virulence factor


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virulence factor

A substance released by a microorganism that allows it to evade host defenses or cause serious injury to its host. Although most virulence factors are released by bacteria for their own benefit, sometimes factors released by one microorganism foster another disease-causing organism.
See also: factor
References in periodicals archive ?
All four isolates obtained in the present study were negative for all additional virulence factors tested, including beta-2 toxin encoding-gene (cpb2), already reported in other wild animals, and enterotoxin encoding gene (cpe), an important virulence factor for C.
In addition, the O antigen is required for proper functionality or expression of other outer membrane virulence factors.
This highlights the importance of the present study that aimed at targeting a virulence factor of the human pathogen S.
faecium isolates are characterized by a high frequency of genes encoding putative virulence factors, such as collagen adhesin (acm gene), enterococcal surface protein (esp gene), hyaluronidase (hyl gene), gelatinase (gelE gene), endocarditis antigen (efa gene), and cytolysin (cyl operon) [6].
Manganese-dependent regulation of the endocarditis-associated virulence factor EfaA of Enterococcus faecalis.
Seropositivity for Antibodies to DRS-G, a Virulence Factor from Streptococcus dysgalactiae subsp.
Therefore it is deduced that PVL, g-hemolysis and LukED may be important virulence factors in the pathogenesis of S.
Research on prevalent Candida species along with their virulence factors in a given set up would be an important tool to prove the relation between the infective species of Candida and infection.
faecium isolates biofilm formation was the most commonly observed virulence factor (51%) followed by haemolysis production (20%).
In a comparison of virulence factors between biofilm-forming isolates and planktonic cells, significant difference was seen for plasma coagulase and hemolysin production.