The organism in or on which a parasite lives, deriving its body substance or energy from the h. [L. hospes, a host]
accidental h. one that harbors an organism which usually does not infect it.
amplifier h. a h. in which infectious agents multiply rapidly to high levels, providing an important source of infection for vectors in vector-borne diseases.
dead-end h. a h. from which infectious agents are not transmitted to other susceptible h.'s.
definitive h. one in which a parasite reaches the adult or sexually mature stage.final h;
final h. definitive h
intermediate h. , intermediary h. 1. one in which larval or developmental stages occur; 2. a host through which a microorganism can pass or which contains an asexual stage of a parasite.secondary h;
paratenic h. an intermediate h. in which no development of the parasite occurs, although its presence may be required as an essential link in the completion of the parasite's life cycle; e.g., the successive fish h.'s that carry the plerocercoid of Diphyllobothrium latum, the broad fish tapeworm, to larger food fish eventually eaten by man or other final h.'s.transport h;
reservoir h. the h. of an infection in which the infectious agent multiplies and/or develops, and upon which the agent is dependent for survival in nature; the h. essential for the maintenance of the infection during times when active transmission is not occurring.
secondary h. intermediate h
transport h. paratenic h
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