Also found in: Encyclopedia.
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]
Farlex Partner Medical Dictionary © Farlex 2012
aggressin(1) A nonspecific term for any product (antigen) secreted by pathogenic bacteria.
(2) Virulence factor.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.