exotoxin

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Related to Exotoxins: Endotoxins

exotoxin

[¦ek·sə¦täk·sən]
(microbiology)
A toxin that is excreted by a microorganism.
References in periodicals archive ?
Mutational analysis of superantigen activity responsible for the induction of skin erythema by streptococcal pyrogenic exotoxin C.
Prophage regions encode virulence factors such as exotoxins, (13) and the diversity of prophages might affect the variety in GAS pathogenicity.
Among these, the genes associated with lipopolysac-charides (LPS), cell wall, multi-drug efflux pumps, protease, exotoxin A, hemolysin, type II secretion system, attachment, motility, chemotaxis and biofilm formations, are more interesting [12, 13].
It has been proved to be a very sensitive and specific technique for detection of the genes encoding alpha and epsilon exotoxins of C.
Antigenic compounds in GAS infections include the M-protein, hyaluronic acid coat and exotoxins.
Its neutralizing action on certain toxins, exotoxins, virus infections, endotoxins and histamine is in direct proportion to the amount of the lethal factor involved and the amount of ascorbate given.
The resulting HA is characterized by low amounts of nucleic acids, proteins, bacterial endotoxins, exotoxins and microbial contamination which reduces hypersensitivity reactions when the material is injected either as linear or crosslinked HA.
More strikingly, the exotoxins produced by many pathogenic bacteria are encoded in the genome of lysogenic phages.
perfringens can produce at least 20 exotoxins, with alpha-toxin being the most virulent, causing cell destruction by hydrolysis of key cell membrane components and lysis of erythrocytes, leukocytes, platelets, fibroplasts and muscle cells.
First, Aeromonas species can produce highly toxic exotoxins, which may lead to extensive myonecrosis as well as necrotizing fasciitis.
The exotoxins A and B, released by the organism, act on the bowel mucosal wall to cause diarrhea and colitis.