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toxin

toxin (tok´sin)

A noxious or poisonous substance that is formed or elaborated either as an integral part of the cell or tissue, as an extracellular product (exotoxin), or as a combination of the two, during the metabolism and growth of certain microorganisms and some higher plant and animal species. [G. toxikon, poison]
animal t. zootoxin
anthrax t. a culture filtrate of Bacillus anthracis containing an exotoxin with at least three different antigenically distinct components: edema factor, lethal factor, and protective antigen.Bacillus anthracis t;
Bacillus anthracis t. anthrax t
bacterial t. any intracellular or extracellular t. formed in or elaborated by bacterial cells.
bee t. the t. delivered by a bee sting; contains three active principles: biogenic amines, active peptides, and certain hydrolytic enzymes.
botulinus t. a potent neurotoxin from Clostridium botulinum.botulin, botulismotoxin;
cholera t. See Vibrio cholerae.
cobra t. cobrotoxin
Crotalus t. the t. of rattlesnake.
diagnostic diphtheria t. Schick test t
Dick test t. streptococcus erythrogenic t
dinoflagellate t. a potent neurotoxin that is thought to act similarly to botulinus t. by impairing the synthesis or the release of acetylcholine.
diphtheria t. See Corynebacterium diphtheriae.
erythrogenic t. streptococcus erythrogenic t
extracellular t. exotoxin
intracellular t. endotoxin
normal t. a t. solution holding exactly 100 lethal doses in 1 ml.
plant t. phytotoxin
scarlet fever erythrogenic t. streptococcus erythrogenic t
Schick test t. Corynebacterium diphtheriae t. diluted so that the inoculated dose (0.1 or 0.2 ml) will contain 1 / 50 th of guinea pig minimal lethal dose. See also Schick test.diagnostic diphtheria t;
streptococcus erythrogenic t. a culture filtrate of lysogenized group A strains of beta-hemolytic streptococci, erythrogenic when inoculated into the skin of susceptible persons, and neutralized by antibodies that appear during scarlet fever convalescence; three immunological types (A, B, and C) are recognized.Dick test t., erythrogenic t., scarlet fever erythrogenic t;
tetanus t. the neurotropic, heat-labile exotoxin of Clostridium tetani and the cause of tetanus; it has been isolated as a crystalline protein (molecular weight 67,000), is one of the most poisonous substances known, and seems to function by blocking inhibitory synaptic impulses.tetanotoxin;

 

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