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
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
As we compared the virulence factor gene content of the 3 collections, we also compared the proportion of phylogenetic groups and subgroups and of resistant strains.
The infections could be more severe in immune-suppressed individuals like cancer and neutropenic patients.2 Various virulence factors are produced by P.
Agarose gel electrophoresis image that shown the PCR product of a virulence factor gene (iss) at (258 bp) in different bacterial isolates.
A virulence factor that STEC and EPEC can have in common is the adherence factor intimin, which has the encoding sequence eaeA.
Table 4 showed that the most common virulence factors possessed by the isolates were hemolysin and biofilm formation and are acid resistant.
Lynett et al., "cagE is a virulence factor associated with Helicobacter pylori-induced duodenal ulceration in children," The Journal of Infectious Diseases, vol.
Primer pair sequences for real time PCR of the virulence factor are 5' -TGAATCCTGTCGCTAATG-3' as the forward primer; and 5'-TATCATCCGACCTTTCACT-3' as the reverse primer (15).
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].
It most closely resembles Group A streptococcus in genetic sequencing and also shares many of the same virulence factors resulting in similar clinical manifestations.
Manganese-dependent regulation of the endocarditis-associated virulence factor EfaA of Enterococcus faecalis.
capsulatum, CBP1 is a secreted virulence factor that promotes intracellular replication of yeast [45, 46].
The virulence factor in some species of GCS most frequently mentioned is the M protein, the protein that also belongs to group A streptococci [2, 5, 7, 10, 12, 14, 21, 22].