exotoxin

exotoxin
—exotoxic, adj.
/ek'soh tok"sin/, n. Biochem.
a soluble toxin excreted by a microorganism. Cf. endotoxin.
[1915-20; EXO- + TOXIN]

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      a poisonous substance secreted by certain bacteria. In their purest form they are the most potent poisons known and are the active agents in diphtheria, tetanus, and botulism. The term is now sometimes restricted to poisonous proteins that are antigenic—i.e., that stimulate the formation of antibodies—and formed by gram-positive bacteria. Compare endotoxin.

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Universalium. 2010.

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  • exotoxin — noun Etymology: International Scientific Vocabulary Date: 1920 a soluble poisonous substance produced during growth of a microorganism and released into the surrounding medium …   New Collegiate Dictionary

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