virus, pl. viruses (vI´rus)
1. Formerly, the specific agent of an infectious disease. 2. Specifically, a term for a group of infectious agents which with few exceptions are capable of passing through fine filters that retain most bacteria, are usually not visible through the light microscope, lack independent metabolism, and are incapable of growth or reproduction apart from living cells. They have a prokaryotic genetic apparatus but differ sharply from bacteria in other respects. The complete particle usually contains only DNA or RNA, not both, and is usually covered by a protein shell or capsid that protects the nucleic acid. They range in size from 15 mm up to several hundred mm. Classification of v.'s depends upon characteristics of virions as well as upon mode of transmission, host range, symptomatology, and other factors. For v.'s not listed below, see the specific name.filtrable v., ultravirus; 3. Relating to or caused by a v., as a virus disease. [L. poison]
2060 v. a strain of common cold v.; early isolate of Rhinovirus.JH v;
Abelson murine leukemia v. a retrovirus belonging to the Type C retrovirus group subfamily (family Oncovirinae) which is associated with leukemia and produces in vitro transformation of mouse cells.
adeno-associated v. (AAV) Dependovirus
adenoidal-pharyngeal-conjunctival v. adenovirus
adenosatellite v. Dependovirus
African horse sickness v. a v. of the genus Orbivirus, in the family Reoviridae; the cause of African horse sickness.
African swine fever v. a DNA v. related to the family Iridoviridae and the etiologic agent of African swine fever.
AIDS-related v. (ARV) obsolete term for human immunodeficiency v.
Akabane v. a v. of the genus Bunyavirus, family Bunyaviridae, causing abortion in cattle and congenital arthrogryposis and hydranencephaly in bovine fetuses in Israel, Japan, and Australia; it is transmitted by mosquitoes.
Aleutian mink disease v. a v. of the genus Parvovirus causing Aleutian mink disease.
amphotropic v. an oncornavirus that does not produce disease in its natural host but does replicate in tissue culture cells of the host species and also in cells from other species.
animal viruses v.'s occurring in man and other animals, causing inapparent infection or producing disease.
A-P-C v. adenovirus
Argentine hemorrhagic fever v. (ar-jen-ten´) a member of the Arenaviridae.
attenuated v. a variant strain of a pathogenic v., so modified as to excite the production of protective antibodies, yet not producing the specific disease.
Aujeszky's disease v. pseudorabies v
Australian X disease v. Murray Valley encephalitis v
avian encephalomyelitis v. a v. of the genus Enterovirus (family Picornaviridae) causing avian infectious encephalomyelitis in young chicks.
avian erythroblastosis v. avian leukosis-sarcoma complex (2)
avian infectious laryngotracheitis v. a herpesvirus causing avian infectious laryngotracheitis.
avian influenza v. a type A influenza v. (genus Influenzavirus) that causes fowl plague.fowl plague v;
avian leukosis-sarcoma v. avian leukosis-sarcoma complex (2)
avian lymphomatosis v. 1. avian leukosis-sarcoma complex (2) 2. avian neurolymphomatosis v
avian myeloblastosis v. avian leukosis-sarcoma complex (2)
avian neurolymphomatosis v. the herpesvirus that causes avian lymphomatosis (Marek's disease); is distinct from those causing other forms of leukosis.avian lymphomatosis v. (2), fowl neurolymphomatosis v., Marek's disease v;
avian pneumoencephalitis v. Newcastle disease v
avian sarcoma v. avian leukosis-sarcoma complex (2)
avian viral arthritis v. a v. of the genus Reovirus, family Reoviridae, causing tenosynovitis and arthritis in chickens.
B v. a herpesvirus, in the family Herpesviridae, affecting Old World monkeys, that is very similar morphologically to herpes simplex v.; fatal infection may occur in humans following the bite of an infected monkey, although other modes of transmission have also been documented.monkey B v;
B19 v. a human parvovirus associated with arthritis and arthralgia and a number of specific clinical entities, including erythema infectiosum and aplastic crisis in the presence of hemolytic anemia.
bacterial v. a v. which "infects" bacteria; a bacteriophage.
Bittner v. (bit´ner) mammary tumor v. of mice
BK v. a human polyomavirus, in the family Papovaviridae, of worldwide distribution which produces infections that are usually subclinical in immunocompetent individuals. [initials of patient from whom first isolated]
bluecomb v. transmissible turkey enteritis v
bluetongue v. a v. of the genus Orbivirus, in the family Reoviridae; the agent of bluetongue in sheep.
Bolivian hemorrhagic fever v. a member of the Arenavirus group of single-stranded RNA viruses also known as Machupo v.; primary reservoir in rodents; produces multiple abnormalities in coagulation system including widespread capillary leak syndrome, which can be fatal.
Borna disease v. an unclassified RNA v. that is the cause of Borna disease, a disease of horses.enzootic encephalomyelitis v;
Bornholm disease v. epidemic pleurodynia v
bovine ephemeral fever v. a rhabdovirus causing bovine ephemeral fever in cattle.
bovine immunodeficiency v. a lentivirus causing lymphocytosis in cattle.
bovine leukemia v. (BLV) a type C retrovirus in the subfamily Retrovirinae, commonly infecting cattle, especially dairy cows; in a small proportion of infected cattle, it will cause enzootic bovine leukosis.bovine leukosis v;
bovine leukosis v. bovine leukemia v
bovine papular stomatitis v. a poxvirus of the genus Parapoxvirus, reported from North America, Africa and Europe, causing bovine papular stomatitis.papular stomatitis v. of cattle;
bovine respiratory syncytial v. a pneumovirus causing an emerging disease in young cattle characterized by pneumonia, interstitial pulmonary edema, and emphysema; sheep are also susceptible to the v.
bovine virus diarrhea v. a v. of the genus Pestivirus, in the family Togaviridae, causing bovine v. diarrhea; New York, Oregon, and Indiana strains of the v. are recognized.mucosal disease v;
Bunyamwera v. a serologic group of the genus Bunyavirus, composed of over 150 v. types in the family Bunyaviridae. [Bunyamwera, Uganda, where first isolated]
Bwamba v. a genus of viruses in the family Bunyaviridae; a serologic group of the genus Bunyavirus; associated with cases of Bwamba fever in Uganda. [Bwamba, forest in Uganda where first isolated]
CA v. abbreviation for croup-associated v.
California v. a serologic group of the genus Bunyavirus, comprising over 14 strains including La Crosse and Tahyna v., and the type strain, California v., which causes encephalitis, chiefly in the age group 4 to 14 years.
camelpox v. an orthopoxvirus causing camelpox in camels.
canarypox v. a poxvirus of the genus Avipoxvirus causing a fatal disease of canaries, and also infecting sparrows.
canine distemper v. an RNA v. of the genus Morbillivirus, a member of the family Paramyxoviridae, that causes canine distemper.dog distemper v;
Capim viruses a serologic group of the genus Bunyavirus, the type species of which is Capim v.
caprine arthritis-encephalomyelitis v. a lentivirus causing caprine arthritis-encephalomyelitis in goats.
Caraparu v. a species of C group Bunyavirus and an agent of bunyavirus encephalitis.
cat distemper v. feline panleukopenia v
cattle plague v. rinderpest v
Catu v. an arbovirus of the genus Bunyavirus, of the family Bunyaviridae; an agent of bunyavirus encephalitis.
CELO v. a v. with characteristics of adenovirus, and similar to quail bronchitis v.chicken embryo lethal orphan v;
Central European tick-borne encephalitis v. one of the v.'s of the tick-borne encephalitis complex of group B arboviruses (genus Flavivirus); the causative agent of tick-borne encephalitis (Central European subtype).
C group viruses a serologic group of the genus Bunyavirus (formerly called group C arboviruses), composed of 12 species including Caraparu, Murutucu, and Oriboca v.
Chagres v. a v. in the family Bunyaviridae, an agent of bunyavirus encephalitis.
chicken embryo lethal orphan v. CELO v
chickenpox v. varicella-zoster v
chikungunya v. a mosquito-transmitted arbovirus of the genus Alphavirus (family Togaviridae) found in parts of Africa and in India, Thailand, and Malaysia; causes a febrile illness with joint pains. [named for the "bent up" position of persons so infected]
Coe v. a v. serologically identical with the A-21 strain of coxsackievirus; the cause of a common cold-like disease in military recruits.
cold v. common cold v
Colorado tick fever v. a v. of the genus Orbivirus, from the family Reoviridae, found in the Rocky Mountain region of the United States and transmitted by the tick, Dermacentor andersoni; it causes Colorado tick fever.
Columbia S. K. v. a strain of encephalomyocarditis v.
common cold v. any of the numerous strains of v. etiologically associated with the common cold, chiefly the rhinoviruses, but also strains of adenovirus, Coxsackievirus, ECHO v., and parainfluenza v.cold v;
contagious ecthyma (pustular dermatitis) v. of sheep the poxvirus of the genus Parapoxvirus causing contagious ecthyma (pustular dermatitis) of sheep.soremouth v;
contagious pustular stomatitis v. horsepox v
cowpox v. a v. of the genus Orthopoxvirus that causes cowpox.
Coxsackie v. See Coxsackievirus.
Crimean-Congo hemorrhagic fever v. a v. of the genus Nairovirus (family Bunyaviridae) from Africa and the southern USSR, carried by ticks (Hyalomma and Amblyomma) and found in human blood; the cause of Crimean-Congo hemorrhagic fever.
croup-associated v. (CA v.) parainfluenza v. type 2. See parainfluenza viruses.
cytopathogenic v. a v. whose multiplication leads to degenerative changes in the host cell. See also cytopathic effect.
defective v. a v. particle that contains insufficient nucleic acid to provide for production of all essential viral components; consequently, infectious v. is not produced except under certain conditions (e.g., when the host cell is infected with a "helper" v. also).
delta v. hepatitis delta v
dengue v. a v. of the genus Flavivirus, about 50 nm in diameter; the etiologic agent of dengue in humans and also occurring in monkeys and chimpanzees, usually as inapparent infection; four serotypes are recognized; transmission is effected by mosquitoes of the genus Aedes.
distemper v. See canine distemper v., feline panleukopenia v.
DNA v. a major group of animal v.'s in which the core consists of deoxyribonucleic acid (DNA); it includes parvoviruses, papovaviruses, adenoviruses, herpesviruses, poxviruses, and other unclassified DNA v.'s.deoxyvirus;
dog distemper v. canine distemper v
duck hepatitis v. a DNA v. of the genus Hepadnavirus, in the family Hepadnaviridae, causing v. hepatitis of ducks.
duck influenza v. an influenza A v., a member of the family Orthomyxoviridae, distinct from human influenza A strains on bases of hemagglutination-inhibition.
duck plague v. a herpesvirus that causes duck plague.
eastern equine encephalomyelitis v. a v. of the genus Alphavirus (formerly group A arbovirus), in the family Togaviridae, occurring in the eastern United States; it is normally present in certain wild birds as an inapparent infection, but is capable of causing eastern equine encephalomyelitis in horses and humans following transfer by the bites of culicine mosquitoes.EEE v;
EB v. Epstein-Barr v
Ebola v. a v. morphologically similar to but antigenically distinct from Marburg v., in the family Filoviridae, which causes viral hemorrhagic fever.viral hemorrhagic fever v;
ECBO v. former name for early isolates of bovine enteroviruses.enteric cytopathogenic bovine orphan v;
ECHO v. an enterovirus belonging to the Picornaviridae, isolated from humans; while there are many inapparent infections, certain of the several serotypes are associated with fever and aseptic meningitis, and some appear to cause mild respiratory disease.echovirus, enteric cytopathogenic human orphan v;
ECMO v. simian picornavirus recovered from monkey kidney cells and stools.enteric cytopathogenic monkey orphan v;
ecotropic v. an oncornavirus that does not produce disease in its natural host but does replicate in tissue culture cells derived from the host species.
ECSO v. a picornavirus isolated from outbreaks of enteritis in swine, but not known to be a natural pathogen.enteric cytopathogenic swine orphan v;
ectromelia v. infectious ectromelia v
EEE v. eastern equine encephalomyelitis v
EMC v. encephalomyocarditis v
emerging viruses in epidemiology, a class of viruses that have long infected humans or animals but now have the opportunity to attain epidemic proportions due to human encroachment on tropical rainforests, increased international travel, burgeoning populations in less developed countries, and, possibly, global warming. About two dozen viruses have been termed emergent, including hemorrhagic viruses such as Ebola, Marburg, and Hantaan; the rabies-like viruses Mokola and Duvenhage; rodent-borne Jinin and Lassa virus; and mosquito-borne dengue. Virologists speculate that the strain of HIV that causes AIDS may also fall into this category, having entered humans through contact with monkeys in central Africa, possibly having existed among monkey populations for some 50,000 years.
encephalitis v. any one of a variety of v.'s that cause encephalitis.
encephalomyocarditis v. a picornavirus, probably of rodents, isolated from blood and stools of humans, other primates, pigs, and rabbits; occasionally causes febrile illness with central nervous system involvement in humans, and an often fatal myocarditis in chimpanzees, monkeys and pigs; strains of this v. include Columbia S. K. v. and Mengo v.EMC v;
enteric viruses v.'s of the genus Enterovirus.
enteric cytopathogenic bovine orphan v. ECBO v
enteric cytopathogenic human orphan v. ECHO v
enteric cytopathogenic monkey orphan v. ECMO v
enteric cytopathogenic swine orphan v. ECSO v
enteric orphan viruses enteroviruses isolated from humans and other animals, "orphan" implying lack of known association with disease when isolated; many v.'s of the group are now known to be pathogenic; they include ECBO viruses, ECHO viruses, and ECSO viruses.
enzootic encephalomyelitis v. Borna disease v
ephemeral fever v. a rhabdovirus that causes ephemeral fever of cattle.
epidemic gastroenteritis v. a RNA v., about 27 nm in diameter, which has not been cultured in vitro; it is the cause of epidemic nonbacterial gastroenteritis; at least five antigenically distinct serotypes have been recognized, including the Norwalk agent. These viruses are probably classified with the Caliciviruses in the family Caliciviridae.gastroenteritis v. type A;
epidemic keratoconjunctivitis v. an adenovirus (type 8) causing epidemic keratoconjunctivitis, especially among shipyard workers, and also associated with outbreaks of swimming pool conjunctivitis.
epidemic myalgia v. epidemic pleurodynia v
epidemic parotitis v. mumps v
epidemic pleurodynia v. a v. of Enterovirus coxsackievirus type B, in the family Picornaviridae, that causes epidemic pleurodynia.Bornholm disease v., epidemic myalgia v;
epizootic hemorrhagic disease of deer v. an orbivirus causing epizootic hemorrhagic disease of deer.
Epstein-Barr v. (EBV) a herpesvirus that causes infectious mononucleosis and is also found in cell cultures of Burkitt's lymphoma; associated with nasopharyngeal carcinoma.EB v., human herpesvirus 4;
equine abortion v. equine rhinopneumonitis v
equine arteritis v. a v. of the genus Pestivirus, a member of the family Togaviridae, that causes equine viral arteritis and, frequently, abortion; probably the most common cause of equine influenza.infectious arteritis v. of horses;
equine coital exanthema v. a herpesvirus causing coital exanthema in male and female horses.
equine encephalosis v. an orbivirus causing equine encephalosis in horses.
equine infectious anemia v. caused by a retrovirus, of the Lentivirinae subfamily, and the cause of equine infectious anemia.swamp fever v;
equine influenza viruses strains of influenza v. type A which cause horse influenza; there are several subtypes.
equine rhinopneumonitis v. a herpesvirus reported in the U.S. Europe, and South Africa, causing equine rhinopneumonitis and equine virus abortion.equine abortion v;
FA v. a strain of mouse encephalomyelitis v.
feline immunodeficiency v. (FIV) a lentivirus causing acquired immunodeficiency in cats.
feline leukemia v. (FeLV) a retrovirus of the Oncornovirinae subfamily causing many proliferative (neoplastic) and degenerative (blastopenic) diseases in domestic cats, including lymphosarcoma, thymic atrophy, immune complex glomerulonephritis, fetal abortions and resorptions, and several myeloproliferative and myelodegenerative conditions; it also causes immunosuppression in infected cats.
feline panleukopenia v. a v. of the genus Parvovirus that causes panleukopenia; the v. infects all Felidae, raccoons and mink, but not dogs or other Canidae.cat distemper v., panleukopenia v. of cats;
feline rhinotracheitis v. a herpesvirus that causes feline viral rhinotracheitis.
fibromatosis v. of rabbits rabbit fibroma v
fibrous bacterial viruses filamentous bacterial viruses
filamentous bacterial viruses deoxyribonucleoproteins that "infect" and replicate in Gram-negative bacteria having sex pili and that, unlike bacteriophage, are released from infected bacteria without damage to the cell; they seem to be of two kinds, one of which has a specificity for F pili and the other for I pili.fibrous bacterial viruses;
filtrable v. virus (2)
fixed v. rabies v. whose virulence for rabbits has been stabilized by numerous passages through this experimental host. See also street v.
Flury strain rabies v. See rabies v., Flury strain.
FMD v. foot-and-mouth disease v
foamy viruses retroviruses of the subfamily Spumavirinae, found in primates and other mammals; so named because of lacelike changes produced in monkey kidney cells; syncytia are also produced.foamy agents;
foot-and-mouth disease v. a picornavirus of the genus Rhinovirus causing foot-and-mouth disease of cattle, swine, sheep, goats, and wild ruminants; it has wide distribution throughout Africa and Asia, causing serious economic losses; the v. is spread by contamination of the animal environment with infected saliva and excreta.FMD v;
fowl erythroblastosis v. avian leukosis-sarcoma complex (2)
fowl lymphomatosis v. avian leukosis-sarcoma complex (2)
fowl myeloblastosis v. avian leukosis-sarcoma complex (2)
fowl neurolymphomatosis v. avian neurolymphomatosis v
fowl plague v. avian influenza v
fowlpox v. a v. of the genus Avipoxvirus causing fowlpox and avian diphtheria.
fox encephalitis v. canine adenovirus 1
Friend v. a strain of the splenic group of mouse leukemia v.'s, related to Moloney and Rauscher v.'s.Friend leukemia v., Swiss mouse leukemia v;
Friend leukemia v. Friend v
GAL v. a v. with characteristics of adenovirus, not known to be associated with natural disease.gallus adeno-like v;
gallus adeno-like v. GAL v
gastroenteritis v. type A epidemic gastroenteritis v
gastroenteritis v. type B rotavirus
German measles v. rubella v
Germiston v. a virus in the genus Bunyavirus, family Bunyaviridae
goatpox v. a v. of the genus Capripoxvirus; the cause of goatpox.
Graffi's v. a mouse myeloleukemia v. from filtrates of transplantable tumors; possibly related to Gross' v.
green monkey v. Marburg v
Gross' v. a strain of mouse leukemia v.Gross' leukemia v;
Gross' leukemia v. Gross' v
Guama v. a serologic group of the genus Bunyavirus, composed of 6 species including Catu v., and the type strain, Guama v.
Guaroa v. a v. of the Bunyamwera group of the genus Bunyavirus, and an agent of bunyavirus encephalitis.
HA1 v. hemadsorption v. type 1 See parainfluenza viruses.
HA2 v. hemadsorption v. type 2 See parainfluenza viruses.
hand-foot-and-mouth disease v. the v. causing hand-foot-and-mouth disease; chiefly type A16 but also types A4, A5, A7, A9, or A10 Entervirus coxsackievirus.
Hantaan v. a v. of the family Bunyaviridae that causes Korean hemorrhagic fever.
hard pad v. the v. causing hard pad disease, probably canine distemper v., but sometimes not recovered.
helper v. a v. whose replication renders it possible for a defective v. or a virusoid (also present in the host cell) to develop into fully infectious agent.
hemadsorption v. type 1 parainfluenza v. type 3. See parainfluenza viruses.HA1 v;
hemadsorption v. type 2 parainfluenza v. type 1. See parainfluenza viruses.HA2 v;
hepatitis A v. (HAV) an RNA virus in the family Picornaviridae; the causative agent of viral hepatitis type A.infectious hepatitis v;
hepatitis B v. (HBV) a DNA virus in the family Hepadnaviridae; the causative agent of viral hepatitis type B.serum hepatitis v;
hepatitis C v. (HCV) a non-A, non-B RNA v. causing post-transfusion hepatitis; it appears to be a member of the family Flaviviridae.
hepatitis delta v. (HDV) a small "defective" RNA v., similar to viroids and virusoids, that requires the presence of hepatitis B v. for replication. The clinical course is variable but is usually more severe than other hepatitides.delta agent, delta antigen, delta v;
hepatitis E v. (HEV) a RNA v., possibly a Calcivirus, that is the principal cause of enterically transmitted, waterborne, or epidemic non A, non B hepatitis occurring primarily in Asia or Africa.
herpes v. See herpesvirus.
herpes simplex v. (HSV) See herpes simplex.
herpes zoster v. varicella-zoster v
hog cholera v. an RNA virus of the genus Pestivirus, in the family Togaviridae, that causes hog cholera.swine fever v;
horsepox v. the poxvirus causing horsepox.contagious pustular stomatitis v;
human immunodeficiency v. (HIV) human T-cell lymphotropic v. type III; a cytopathic retrovirus (subfamily Lentvirinae, family Retroviridae) that is about 100 nm in diameter, has a lipid envelope, and has a characteristic dense cylindrical nucleoid containing core proteins and genomic RNA; it is the etiologic agent of acquired immunodeficiency syndrome (AIDS). Formerly or also known as the lymphadenopathy v. (LAV) or the human T-cell lymphotropic v. type III (HTLV-III). Identified in 1984 by Luc Montagnier and colleagues. RNA; it is the etiologic agent of acquired immunodeficiency syndrome (AIDS).lymphadenopathy-associated v;
human papilloma v. (HPV) an icosahedral DNA v., 55 nm in diameter, of the genus Papillomavirus, family Papovaviridae; certain types cause cutaneous and genital warts in humans, including verruca vulgaris and condyloma acuminatum; other types are associated with severe cervical intraepithelial neoplasia and anogenital and laryngeal carcinomas. Over 70 types have been characterized on the basis of DNA relatedness.infectious papilloma v; HPV infection has emerged as a major public health problem, especially for women. Eighty percent of cervical cancer is attributable to HPV infection, and some 25% of all irregularities seen on Pap smears are also believed to be owed to the presence of the virus, which is often otherwise asymptomatic. Some 40% of HIV-positive women present with severe cervical dysplasia caused by HPV, which in many cases proceeds to fatal cancer with an aggressiveness not commonly seen among non-HIV-positive women. A significant number of AIDS patients who are homosexual men also display anal dysplasia and squamous cell carcinomas due to HPV. The risk of contracting the virus goes up with the number of sexual partners. Some protection is conveyed by diaphragms and condoms.
human T-cell lymphoma/leukemia v. (HTLV) a group of viruses (subfamily Oncovirinae, family Retroviridae) that are lymphotropic with a selective affinity for the helper/inducer cell subset of T lymphocytes and that are associated with adult T-cell leukemia and lymphoma.human T-cell lymphotropic v;
human T-cell lymphotropic v. human T-cell lymphoma/leukemia v
human T lymphotrophic v. a virus that has a predilection for human lymphoid cells.
Ibaraki v. a v. of cattle in Japan, closely related to the bluetongue v.
IBR v. infectious bovine rhinotracheitis v
v. III of rabbits obsolete name for a latent herpesvirus infection of rabbits. [the third strain isolated, used for study]
Ilhéus v. a v. of the genus Flavivirus (group B arbovirus) first isolated in Brazil, later found in Colombia, Central America, and the Caribbean; the cause of Ilhéus encephalitis and Ilhéus fever.
inclusion conjunctivitis viruses former name for Chlamydia trachomatis.
infantile gastroenteritis v. rotavirus
infectious arteritis v. of horses equine arteritis v
infectious bovine rhinotracheitis v. a herpesvirus causing infectious bovine rhinotracheitis.IBR v;
infectious bronchitis v. (IBV) an RNA v. of the family Coronaviridae and the type species of the genus Coronavirus, causing infectious avian bronchitis, being most pathogenic in chicks up to about 4 weeks of age; not to be confused with avian infectious laryngotracheitis v.
infectious bursal disease v. a birnavirus causing infectious bursal disease in chickens.
infectious ectromelia v. a virus belonging to the family Poxviridae morphologically similar to vaccinia v., which occurs as a latent infection in laboratory mice, but which may be activated by stresses such as irradiation and transport to cause disease; inoculation into the footpad results in edema and necrosis.ectromelia v., mousepox v., pseudolymphocytic choriomeningitis v;
infectious hepatitis v. hepatitis A v
infectious papilloma v. human papilloma v
infectious porcine encephalomyelitis v. Teschen disease v
influenza viruses v.'s of the family Orthomyxoviridae which cause influenza and influenza-like infections of humans and other animals; v.'s included are influenza v. types A and B of the genus Influenzavirus, causing, respectively, influenza A and B, and influenza v. type C, which probably belongs to a separate genus and causes influenza C.
insect viruses v.'s pathogenic for insects.
iridescent v. an insect virus in the family Iridoviridae.
Jamestown Canyon v. a member of the California group of arboviruses (family Bunyaviridae) which has been associated with a mild febrile illness in humans in North America.
Japanese B encephalitis v. a v. of the genus Flavivirus (group B arbovirus) occurring particularly in Japan but probably widespread throughout Southeast Asia; the v. is normally present in humans, especially in children, as an inapparent infection, but may cause febrile response and sometimes encephalitis; it may cause encephalitis in horses and abortion in pigs; wild birds are probably the natural hosts and culicine mosquitoes the vectors.Russian autumn encephalitis v;
JC v. a human polyomavirus, family Papovaviridae, of worldwide distribution which produces infections that are usually subclinical in immunocompetent individuals, but is associated with progressive multifocal leukoencephalopathy in immuno-suppressed individuals. [initials of patient from whom first isolated]
JH v. 2060 v [Johns Hopkins University, where first isolated]
Junin v. a v. of the Tacaribe complex of arboviruses, genus Arenavirus, and the cause of Argentinian hemorrhagic fever; also isolated from mites and rodents.
K v. a polyomavirus, family Papovaviridae, that causes pneumonia in young mice by various routes of inoculation.
Kelev strain rabies v. See rabies v., Kelev strain.
Kilham rat v. a v. of the genus Parvovirus causing inapparent infection in rats; also recoverable from rat tumors.latent rat v;
Kisenyi sheep disease v. a v., in the family Bunyaviridae, that is probably the same as Nairobi sheep disease v.
Koongol viruses a serologic group of the genus Bunyavirus, comprising two species, Koongol (type species) and Wongal v.
Korean hemorrhagic fever v. See Hantavirus.
Kyasanur Forest disease v. a group B arbovirus, in the family Flaviviridae, isolated from monkeys in India and capable of causing Kyasanur Forest disease in humans; the v. is spread by monkeys and birds having mild infections; the vectors are probably species of the tick Haemaphysalis.
La Crosse v. a bunyavirus of the California group, family Bunyaviridae, and an agent of bunyavirus encephalitis.
lactate dehydrogenase v. a togavirus present perhaps as a "passenger" in various transplantable mouse tumors.LDH agent;
Lassa v. an arenavirus, family Arenaviridae, that causes Lassa fever, an actue febrile disease with a high mortality.
latent rat v. Kilham rat v
LCM v. lymphocytic choriomeningitis v
Lelystad v. an arterivirus causing a new disease in swine, first reported in 1987 and characterized by abortion and infertility in sows and respiratory problems in piglets.
louping-ill v. a v. of the genus Flavivirus that causes louping ill and is transmitted by the hard tick Ixodes ricinus.
Lucké's v. a herpesvirus associated with Lucké's carcinoma.
lumpyskin disease v. a capripoxvirus causing lumpyskin disease in cattle.
Lunyo v. an atypical strain of Rift Valley fever v.
lymphadenopathy-associated v. (LAV) human immunodeficiency v
lymphocytic choriomeningitis v. an RNA v. of the family Arenaviridae that infects mice, man, monkeys, dogs, and guinea pigs, and causes lymphocytic choriomeningitis; in man, infection may be inapparent, but sometimes the v. causes influenza-like disease, meningitis, or rarely meningoencephalomyelitis; in utero infections of mice establish a type of immunological tolerance.LCM v;
lymphogranuloma venereum v. former name for Chlamydia trachomatis.
Machupo v. a v. of the Tacaribe complex (genus Arenavirus, family Arenaviridae); the cause of Bolivian hemorrhagic fever.
maedi v. a retrovirus (subfamily Lentivirinae) that is the cause of maedi; it is very similar to the visna v.medi v., progressive pneumonia v;
malignant catarrhal fever v. a herpesvirus of wide distribution causing malignant catarrhal fever of cattle; sheep and wildebeests harbor inapparent infections and may transmit the v. to cattle.
Maloney leukemia v. (ma-lo´ne) a retrovirus associated with leukemia in rodents.
mammary cancer v. of mice mammary tumor v. of mice
mammary tumor v. of mice member of the retrovirus subfamily Oncornavirinae, antigenically distinct from the murine leukemia-sarcoma complex, that is associated with adenocarcinomatous tumors of the mammary gland, commonly latent in wild and laboratory mice and causing cancer only in genetically susceptible strains under certain hormonal influences.Bittner agent, Bittner v., Bittner's milk factor, mammary cancer v. of mice, milk factor, mouse mammary tumor v;
Marburg v. an RNA-containing v., genus Filovirus in the family Filoviridae, first recognized at Marburg University (Germany), where it was the cause of a highly fatal hemorrhagic fever among handlers and laboratory workers of green monkeys.green monkey v;
Marek's disease v. avian neurolymphomatosis v
marmoset v. a herpesvirus obtained repeatedly from throat swabs and tissues of New World monkeys.
masked v. a v. ordinarily occurring in the host in a noninfective state, but which may be activated and demonstrated by special procedures such as blind passage in experimental animals.
Mason-Pfizer v. a D-type retrovirus in the subfamily Oncornaviridae that was isolated from a mammary carcinoma of a rhesus monkey.
Mayaro v. a v. of the genus Alphavirus, family Togaviridae, causing epidemics of undifferentiated type fever in South America.
measles v. an RNA v. of the genus Morbillivirus, family Paramyxoviridae, that causes measles in man and is transmitted via the respiratory tract; possesses hemagglutinating, hemadsorbing, and hemolyzing properties.rubeola v;
medi v. maedi v
Mengo v. a strain of encephalomyocarditis v.
milker's nodule v. a virus in the family Poxviridae.
mink enteritis v. a parvovirus that causes enteritis of mink.
MM v. a strain of encephalomyocarditis v.
Mokola v. a rabies related v. of the genus Lyssavirus, family Rhabdoviridae, first isolated from shrews (Crocidura spp.) in Nigeria, which has caused fatal neurological disease in man and cats in Africa.
molluscum contagiosum v. the poxvirus causing molluscum contagiosum of humans.
Moloney's v. a lymphoid leukemia retrovirus of mice, in the subfamily Oncovirinae, isolated originally during propagation of S 37 mouse sarcoma.
monkey B v. B v
monkeypox v. a v. of the genus Orthopoxvirus causing monkeypox.
mouse encephalomyelitis v. a v. of the genus Enterovirus, family Picornaviridae, normally associated with inapparent infections and found in the intestinal tracts of infected mice, occasionally causing mouse encephalomyelitis in experimentally inoculated susceptible mice.mouse poliomyelitis v;
mouse hepatitis v. a coronavirus, in the family Coronaviridae, that in the presence of Eperythrozoon coccoides causes fatal hepatitis in newly weaned mice; otherwise causes inapparent infection.
mouse leukemia viruses retroviruses of the murine leukemia-sarcoma complex that produce leukemia and sometimes lymphosarcomas in mice, including the Abelron, Gross, Moloney, Friend, and Rauscher strains of v.; they have been isolated from inbred mice having high incidence of spontaneous lymphoid leukemia.
mouse mammary tumor v. mammary tumor v. of mice
mouse parotid tumor v. polyoma v
mouse poliomyelitis v. mouse encephalomyelitis v
mousepox v. infectious ectromelia v
mouse thymic v. an unclassified ether-sensitive v., 75 to 100 nm in diameter, that causes necrosis of the thymus in young mice.
mucosal disease v. bovine virus diarrhea v
mumps v. a v. of the genus Paramyxovirus, family Paramyxoviridae, causing parotitis in man, sometimes with complications of orchitis, oophoritis, pancreatitis, meningoencephalitis and others, and transmitted by infectious salivary secretions.epidemic parotitis v;
murine sarcoma v. a seemingly defective retrovirus that produces sarcomas in mice when growing in the presence of a "helper" v.; e.g., mouse leukemia v.
Murray Valley encephalitis v. a group B arbovirus of the genus Flavivirus that causes Murray Valley encephalitis; it is transmitted by Culex mosquitoes, and also infects birds and horses.Australian X disease v., MVE v;
Murutucu v. a C group mosquito-borne v. of the genus Bunyavirus, which has caused undifferentiated type fever in Brazil and French Guiana.
MVE v. Murray Valley encephalitis v
myxomatosis v. rabbit myxoma v
Nairobi sheep disease v. an unclassified arbovirus of the family Bunyaviridae causing Nairobi sheep disease, transmitted by the tick, Rhipicephalus appendiculatus; it is a serologic group of v.'s morphologically like Bunyavirus but antigenically unrelated to it.
naked v. a v. consisting only of a nucleocapsid; i.e., one that does not possess an enclosing envelope.
ND v. Newcastle disease v
Nebraska calf scours v. the bovine rotavirus. See rotavirus.
Neethling v. See lumpyskin disease v.
negative strand v. a v. the genome of which is a strand of RNA that is complementary to messenger RNA; negative strand v.'s also carry RNA polymerases necessary for the synthesis of messenger RNA.
Negishi v. one of the group B arboviruses (genus Flavivirus) of the tick-borne encephalitis complex, isolated from fatal infections in Japan.
neonatal calf diarrhea v. one of two v.'s causing neonatal calf diarrhea; a reovirus-like v. is associated with disease in newborn calves, and a coronavirus is associated with disease in calves over 5 days of age.
neurotropic v. a v. that has an affinity for nervous tissue, e.g., poliomyelitis v., neurotropic v. variant of yellow fever, and the "fixed" v. of rabies.
Newcastle disease v. a v. of the genus Paramyxovirus causing Newcastle disease in chickens and, to a lesser extent, in turkeys and other birds; it may occasionally infect laboratory and poultry workers, causing conjunctivitis and lymphadenitis.avian pneumoencephalitis v., ND v;
non-A, non-B hepatitis v. term used to group any of a number of viruses, other than A or B, which cause hepatitis in humans.
nonoccluded v. a v. not inclosed in an inclusion body, usually with reference to an insect v.
Norwalk v. a v. associated with acute viral gastroenteritis and probably belonging to the calicivirus group.
occluded v. a v. inclosed in an inclusion body, usually with reference to an insect v.
Omsk hemorrhagic fever v. a v. of the genus Flavivirus causing Omsk hemorrhagic fever.
oncogenic v. a v. of one of the two groups of tumor-inducing v.'s: the RNA tumor v.'s (subfamily Oncovirinae), which are well defined and rather homogeneous, or the DNA v.'s, which are more diverse.tumor v;
O'nyong-nyong v. a v. of the genus Alphavirus, in the family Togaviridae, found in Uganda, Kenya, and Congo, which causes O'nyong-nyong fever.
orf v. a parapoxvirus causing orf in sheep and goats and sometimes humans.
Oriboca v. a C group v. of the genus Bunyavirus, and an agent of bunyavirus encephalitis.
ornithosis v. former name for Chlamydia psittaci.
orphan viruses v.'s, such as the enteric orphan v.'s, which when originally found were not specifically associated with disease; a number of these have since been shown to be pathogenic.
Pacheco's parrot disease v. probably a v. of the family Herpesviridae, possibly related to the v. of infectious laryngotracheitis.parrot v. (2);
panleukopenia v. of cats feline panleukopenia v
pantropic v. the ordinary strain of yellow fever v., as distinguished from the neurotropic strain; has an affinity for different tissues.
papilloma v. (pap-i-lo´ma) Papillomavirus
pappataci fever viruses phlebotomus fever viruses
papular stomatitis v. of cattle bovine papular stomatitis v
parainfluenza viruses v.'s of the genus Paramyxovirus, of four types: type 1 (hemadsorption v. type 2), which includes sendai v., causes acute laryngotracheitis in children and occasionally adults; type 2 (croup-associated v.) is associated especially with acute laryngotracheitis or croup in young children and minor upper respiratory infections in adults; type 3 (hemadsorption v. type 1; shipping fever v.) has been isolated from small children with pharyngitis, bronchiolitis, and pneumonia, and causes occasional respiratory infection in adults; bovine strains have been isolated from cattle with shipping fever, and the v. has also been isolated from sheep; type 4 has been isolated from a very few children with minor respiratory illness.
paravaccinia v. pseudocowpox v
parrot v. 1. obsolete term for Chlamydia psittaci; 2. Pacheco's parrot disease v
Patois v. a serologic group of the genus Bunyavirus, comprising 4 species.
peste des petits ruminants v. a morbillivirus causing peste des petits ruminants in sheep and goats.
pharyngoconjunctival fever v. one of several types of adenoviruses associated with outbreaks of fever and pharyngitis, sometimes with conjunctivitis, especially in service recruits and people in boarding schools.
phlebotomus fever viruses an unclassified serologic group of arboviruses morphologically like Bunyavirus but antigenically unrelated, transmitted by Phlebotomus papatasi (sandfly) and causing phlebotomus fever; there are 20 strains, including Icoarachi and Itaporanga.pappataci fever viruses, sandfly fever viruses;
plant viruses v.'s pathogenic to higher plants.
pneumonia v. of mice an RNA v. of the genus Pneumovirus, a member of the family Paramyxoviridae, occurring normally as latent infection in laboratory mice, but capable of activation by serial intranasal passage and causing pneumonia.PVM v;
poliomyelitis v. the picornavirus (genus Enterovirus) causing poliomyelitis in humans; the route of infection is the alimentary tract, but the v. may enter the bloodstream and nervous system, sometimes causing paralysis of the limbs and, rarely, encephalitis; many infections are inapparent; serologic types 1, 2, and 3 are recognized, type 1 being responsible for most paralytic poliomyelitis and most epidemics.poliovirus hominis, poliovirus;
polyoma v. a papovavirus (genus Polyomavirus) which normally occurs in inapparent infections in laboratory and wild mice, but after growth on tissue culture is capable of producing parotid tumors in mice and sarcomas in hamsters as well as tumors in other laboratory animals.mouse parotid tumor v;
porcine epidemic diarrhea v. a coronavirus causing porcine epidemic diarrhea in pigs.
porcine hemagglutinating encephalomyelitis v. a coronavirus causing vomiting, wasting, and encephalomyelitis in young pigs.
porcine sarcoma v. a retrovirus causing sarcoma in swine.
Powassan v. a v. of the genus Flavivirus (family Flaviviridae), transmitted by ixodid ticks and causing Powassan encephalitis in children; also capable of producing meningoencephalomyelitis in rabbits and children. [Powassan, Canada, where first isolated]
progressive pneumonia v. maedi v
pseudocowpox v. a v. of the genus Parapoxvirus that causes pseudocowpox in humans and cattle; it is closely related to orf v. and papular stomatitis v.paravaccinia v;
pseudolymphocytic choriomeningitis v. infectious ectromelia v
pseudorabies v. a herpesvirus causing pseudorabies in swine.Aujeszky's disease v;
psittacosis v. former name for Chlamydia psittaci.
PVM v. pneumonia v. of mice
quail bronchitis v. a v., similiar to an adenovirus, closely related antigenically to CELO v.
Quaranfil v. an ungrouped arbovirus isolated from human blood and from herons.
rabbit fibroma v. a poxvirus of the genus Leporipoxvirus, closely related to vaccinia and myxoma v.'s, that causes Shope fibroma.fibromatosis v. of rabbits, Shope fibroma v;
rabbit myxoma v. the poxvirus of the genus Leporipoxvirus causing myxomatosis of rabbits.myxomatosis v;
rabbitpox v. an orthopoxvirus that causes epidemics of pox in laboratory rabbits; immunologically, it is closely related to vaccinia v. but is more virulent in rabbits.
rabies v. a large bullet-shaped v. of the genus Lyssavirus, in the family Rhabdoviridae, that is the causative agent of rabies.
rabies v., Flury strain a v. isolated from human brain, attenuated (fixed) by serial propagation in nonmammalian hosts, and subsequently established in chick embryo culture.
rabies v., Kelev strain an attenuated, embryonate fowl egg-passaged strain.
rat sialodacryoadenitis v. a coronavirus causing sialodacryoadenitis in rats.
Rauscher leukemia v. an RNA retrovirus associated with leukemia in rodents; similar to Friend v.Rauscher's v;
Rauscher's v. Rauscher leukemia v
REO v. respiratory enteric orphan v
respiratory enteric orphan v. a nonenveloped icosahedral virus whose genome consists of double stranded RNA, belonging to the family Reoviridae, frequently found in both the respiratory and enteric tract.REO v;
respiratory syncytial v. an RNA v. of the genus Pneumovirus, in the family Paramyxoviridae, with a tendency to form syncytia in tissue culture, that causes minor respiratory infection with rhinitis and cough in adults, but is capable of causing severe bronchitis and bronchopneumonia in young children; first isolated from chimpanzees with respiratory disease.chimpanzee coryza agent, Rs v;
Rida v. a variant of the scrapie agent.
Rift Valley fever v. a v. of the genus Phlebovirus (family Bunyaviridae) that occurs in central and southern Africa in sheep, goats, and cattle, causing abortions and severe febrile disease, especially in young lambs; humans, especially herdsmen and veterinarians, who may become infected through close contact with infected animals, developing a dengue-like disease; the v. also infects buffaloes, camels and antelopes; it is mosquito-borne, but also probably infects by contact and respiratory tract.
rinderpest v. an RNA v. of the genus Morbillivirus, causing rinderpest; it is closely related to the measles and canine distemper v.'s.cattle plague v;
RNA v. a group of v.'s in which the core consists of RNA; a major group of animal v.'s that includes the families Picornaviridae, Reoviridae, Togaviridae, Flaviviridae, Bunyaviridae, Arenaviridae, Paramyxoviridae, Retroviridae, Coronaviridae, Orthomyxoviridae, and Rhabdoviridae.ribovirus;
RNA tumor viruses v.'s of the subfamily Oncovirinae.
Ross River v. a mosquito-borne alphavirus, family Togaviridae, that causes epidemic polyarthritis.
Rous-associated v. (RAV) a leukemia v. of the leukosis-sarcoma complex which by phenotypic mixing with a defective (noninfectious) strain of Rous sarcoma v. effects production of infectious sarcoma v. with envelope antigenicity of the RAV.
Rous sarcoma v. (RSV) a sarcoma-producing v. of the avian leukosis-sarcoma complex identified by Rous in 1911.
Rs v. respiratory syncytial v
Rubarth's disease v. canine adenovirus 1
rubella v. an RNA v. of the genus Rubivirus; the agent causing rubella (German measles) in humans.German measles v;
rubeola v. measles v
Russian autumn encephalitis v. Japanese B encephalitis v
Russian spring-summer encephalitis v. tick-borne encephalitis v
Salisbury common cold viruses strains of rhinovirus of historical interest because of early studies that established the viral etiology of common colds.
salivary v. a highly species-specific herpesvirus (cytomegalovirus) with particular affinity for the salivary gland tissue.salivary gland v;
salivary gland v. salivary v
sandfly fever viruses phlebotomus fever viruses
San Miguel sea lion v. a calicivirus, family Caliciviridae, first isolated from sea lions on San Miguel island off the California coast, which is indistinguishable from the vesicular exanthema of swine v. both biophysically and clinically in terms of the vesicular disease syndrome that it produces in swine.
Sendai v. a parainfluenza v. type 1 reported to cause pneumonia in pigs; also used extensively to effect fusion of tissue culture cells.
serum hepatitis v. hepatitis B v
sheep-pox v. a poxvirus of the genus Capripoxvirus causing sheep-pox.
shipping fever v. parainfluenza v. type 3. See parainfluenza viruses.
Shope fibroma v. rabbit fibroma v
Shope papilloma v. a papillomavirus infecting wild cottontail rabbits. See Shope papilloma.
Simbu v. a serologic group of the genus Bunyavirus, comprising a number of species including the type strain, Simbu v.
simian v. (SV) any of a number of v.'s, belonging to various families, isolated from monkeys or from cultures of monkey cells.vacuolating v;
simian v. 40 simian vacuolating v. No. 40
simian hemorrhagic fever v. an arterivirus causing simian hemorrhagic fever in macaque monkeys.
simian vacuolating v. No. 40 (SV40) a small (40 to 45 nm) DNA v. of the genus Polyomavirus, family Papovaviridae; the cause of seemingly inapparent infections in monkeys, especially rhesus, and a common contaminant of monkey cell cultures; the v. may cause inapparent infection in humans and may be excreted in stools of children for several weeks; it can produce fibrosarcoma in suckling hamsters, and transformation may occur in human diploid cells; it may also form "hybrid" v. in cells also infected with certain adenoviruses.simian v. 40;
Sindbis v. the type species of the genus Alphavirus, in the family Togaviridae, usually transmitted by mosquitoes of the genus Culex; and causative agent of Sindbis fever. [village in Egypt where first isolated]
slow v. a v., or a virus-like agent, etiologically associated with a disease having a long incubation period of months to years with a gradual onset frequently terminating in severe illness and/or death.
smallpox v. variola v
snowshoe hare v. a member of the California group of arboviruses (family Bunyaviridae) causing fever, severe headache, and nausea in humans in North America.
soremouth v. contagious ecthyma (pustular dermatitis) v. of sheep
Spondweni v. an arbovirus of the genus Flavivirus isolated from mosquitoes in Africa; may cause disease in humans.
St. Louis encephalitis v. a group B arbovirus, in the family Flaviviridae, occurring in the U.S., Trinidad, and Panama; normally present as inapparent infection in humans, but sometimes a cause of encephalitis; the v. has been isolated from birds in Panama and from several mosquito species, especially Psorophora.
street v. an isolate of rabies v. from a naturally infected domestic animal.
swamp fever v. equine infectious anemia v
swine encephalitis v. a coronavirus, in the family Coronaviridae, that causes swine encephalitis.
swine fever v. hog cholera v
swine influenza viruses strains of influenza v. type A which cause influenza of swine and can infect humans.
swinepox v. a poxvirus distinct from vaccinia v. and the cause of swinepox; the pig louse plays an important role in transmission.
swine vesicular disease v. a porcine enterovirus causing vesicular disease in swine.
Swiss mouse leukemia v. Friend v
Tacaribe v. the type v. of the Tacaribe complex of v.'s (arenaviruses), isolated from bats and mosquitoes in Trinidad.
Tahyna v. a California group arbovirus, in the family Bunyaviridae, from central Europe, known to infect humans.
temperate v. referring to a phage that does not lyse its host immediately but may persist in latent form and eventually lyse its host. See lysogeny.
Teschen disease v. a picornavirus causing Teschen disease of pigs; the v. is normally a harmless inhabitant of the intestinal tract, but virulent strains cause epizootics of the disease.infectious porcine encephalomyelitis v;
Tete viruses a serologic group of the genus Bunyavirus, comprising a number of types.
TGE v. transmissible gastroenteritis v. of swine
Theiler's original v. Theiler's mouse encephalomyelitis v
Theiler's v. Theiler's mouse encephalomyelitis v
Theiler's mouse encephalomyelitis v. a virus in the family Picornaviridae.Theiler's original v., Theiler's v;
tick-borne v. tick-borne encephalitis v
tick-borne encephalitis v. an arbovirus of the genus Flavivirus that occurs in Central Europe and the USSR in two subtypes, causing two forms of encephalitis in humans: tick-borne encephalitis (Central European subtype) and tick-borne encephalitis (Eastern subtype); the vectors are ticks of the genus Ixodes.Russian spring-summer encephalitis v., tick-borne v;
TO v. theiler's original v. See mouse encephalomyelitis v.
trachoma v. former name for Chlamydia trachomatis.
transmissible gastroenteritis v. of swine a coronavirus that causes transmissible gastroenteritis of swine.TGE v;
transmissible turkey enteritis v. a coronavirus causing bluecomb disease of turkeys.bluecomb v;
tumor v. oncogenic v
turkey meningoencephalitis v. a v. of the genus Flavivirus causing paralysis and enteritis in turkeys in Israel.
turkey rhinotracheitis v. a pneumovirus causing rhinotracheitis in turkeys and swollen head syndrome in chickens.
Turlock v. an unclassified serologic group of arboviruses morphologically like Bunyavirus but antigenically unrelated to it.
Umbre v. an arbovirus related serologically to the Turlock v.
vaccine v. See vaccine.
vaccinia v. the poxvirus (genus Orthopoxvirus) used in the immunization of people against variola (smallpox), usually causing a local reaction but sometimes generalized vaccinia, especially in children; the v. is closely related serologically to the v.'s of variola and cowpox, but certain differences have been demonstrated which indicate that they are perhaps distinct but closely related strains of a variola-vaccinia-cowpox complex; the lineage of vaccinia v. is uncertain, and it is very unlikely that it descended from Jenner's original v.poxvirus officinalis;
vacuolating v. simian v
varicella-zoster v. a herpesvirus, morphologically identical to herpes simplex v., that causes varicella (chickenpox) and herpes zoster in man; varicella results from a primary infection with the v.; herpes zoster results from secondary invasion by the same v. or by reactivation of infection which in many instances has been latent for many years.chickenpox v., herpes zoster v., human herpesvirus 3;
variola v. a poxvirus of the genus Orthopoxvirus, the pathogen of smallpox in humans.smallpox v;
VEE v. Venezuelan equine encephalomyelitis v
Venezuelan equine encephalomyelitis v. a group A arbovirus of the genus Alphavirus, family Togaviridae, occurring in Venezuela and several other South American countries, in Panama and Trinidad, and occasionally the United States causing Venezuelan equine encephalomyelitis in horses and humans; it seems to be more viscerotropic than neurotropic; the v. is transmitted by Culex mosquitoes.VEE v;
vesicular exanthema of swine v. a calicivirus causing vesicular exanthema of swine. See also San Miguel sea lion v.
vesicular stomatitis v. an RNA v. of the genus Vesiculovirus, in the family Rhabdoviridae, causing vesicular stomatitis in horses, cattle, sheep, and pigs.VS v;
viral hemorrhagic fever v. Ebola v
visceral disease v. cytomegalovirus
visna v. an RNA v. (subfamily Lentivirinae) that causes visna; it is closely related antigenically to the similar maedi v.
VS v. vesicular stomatitis v
WEE v. western equine encephalomyelitis v
Wesselsbron disease v. a mosquito-borne group B arbovirus of the genus Flavivirus causing Wesselsbron fever.
western equine encephalomyelitis v. a group A arbovirus of the genus Alphavirus, family Togaviridae, occurring in the western United States and parts of South America; it occurs naturally, usually as a symptomless infection in birds, but causes western equine encephalomyelitis in horses and humans following transfer by the bites of mosquitoes, chiefly Culex tarsalis.WEE v;
West Nile v. West Nile encephalitis v
West Nile encephalitis v. caused by a virus in the family Flaviviridae.West Nile v;
xenotropic v. a retrovirus that does not produce disease in its natural host and replicates only in tissue culture cells derived from a different species.
Yaba v. a poxvirus from the family Poxviridae, distinct from monkeypox v., that causes Yaba tumors in monkeys.Yaba monkey v;
Yaba monkey v. Yaba v
yellow fever v. an arbovirus, the type species of the genus Flavivirus, in the family Flaviviridae, endemic in tropical Africa south of the Sahara and in tropical South America, occasionally spreading to countries outside these areas; it is the cause of yellow fever of humans and other primates; the v. exists in wild primates, and probably also in edentates, marsupials, and rodents, and is transmitted to humans by Aedes Aegypti and the Haemagogus complex of tree-top mosquitoes which feed on arboreal mammals.
Zika v. a mosquito-borne virus of the genus Flavivirus (family Flaviviridae), found in parts of Africa and in Malaysia, that causes Zika fever. [Zika, forest in Uganda, where first isolated]
Browse Medical References: