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exotoxin |
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exotoxin /exo·tox·in/ (ek´so-tok″sin) a potent toxin formed and excreted by the bacterial cell, and free in the surrounding medium.ex´otoxic streptococcal pyrogenic exotoxin one produced by Streptococcus pyogenes, existing in several antigenic types and causing fever, the rash of scarlet fever, organ damage, increased blood-brain barrier permeability, and alterations in immune response.
Exotoxin A poisonous secretion produced by bacilli which is carried in the bloodstream to other parts of the body. Mentioned in: Diphtheria exotoxin [ek′sətok′sin] Etymology: Gk, exo + toxikon, poison a toxin that is secreted or excreted by a living microorganism. Compare endotoxin. exotoxin (ek´sōtoksin), n the toxic material formed by microorganisms and subsequently released into their surrounding environments. exotoxin a potent toxin formed and secreted by the bacterial cell, and found free in the surrounding medium. Exotoxins are generally heat labile, and are protein in nature. Many can be detoxified with retention of antigenicity by treatment with formaldehyde (toxoid). Many are important virulence factors in pathogenic bacteria. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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streptococcal streptococcal angina Streptococcal Antibody Tests streptococcal infection Streptococcal Infections streptococcal pharyngitis streptococcal proctitis streptococcal pyrogenic exotoxin streptococcal sex syndrome streptococcal sore throat streptococcemia streptococci streptococcosis Streptococcus Streptococcus agalactiae |
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