aggressin


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ag·gres·sin

(ă-gres'in),
Obsolete term for a substance of microbial origin postulated to inhibit the resistance mechanisms of the host.
[L. agressor, an assailant, fr. ad-gredio, pp. -gressus, to attack]

aggressin

(1) A nonspecific term for any product (antigen) secreted by pathogenic bacteria.
(2) Virulence factor.
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