Due to difficulties in distinguishing benign footrot from early cases of virulent footrot and because there is no possibility for virulence testing of strains of Dichelobacter nodosus in Sweden, the diagnosis is based of the presence or absence of clinical signs of footrot in sheep flocks.
Due to difficulties in distinguishing benign footrot from early cases of virulent footrot and because there is no possibility for virulence testing of strains of D nodosus in Sweden, the diagnosis is based of the presence or absence of clinical signs of footrot (score ≥2) in sheep flocks.
Identification of the dfrA5-IS26 confinuration in a virulence plasmid, highlights the possibility of co-selection of antibiotic resistance and virulence determinants under antibiotic selective pressures [22].
In conclusion, the design of molecules to impair intimate attachment of attaching and effacing pathogens to the intestinal mucosa will probably have an important effect on dangerous microorganisms of public health importance, and there is a possibility that virulence factor inhibitors will be effective for a long time before resistance becomes an issue.
While these genes are strong candidates contributing to human virulence, there are also possibilities of neutral gene acquisition or loss.
The research might even lead to the development of antiviral drugs that work by interfering with the genes responsible for producing virulence in pandemic viruses.Another intriguing possibility raised by Dr Taubenberger's team is that avian viruses may adapt to humans in a predictable sequence.
This evidence suggested the possibility that other virulence factor(s) than cholera toxin might be crucial in the pathogenesis of Vibrio cholerae-induced diarrhoea, but their nature remains unknown.
All these evidence suggested the possibility that other virulence factor(s) than CT might be crucial in the pathogenesis of Vibrio cholerae-induced diarrhoea, but their nature remains still unknown.
By inactivating key genes involved in virulence, it allows for the possibility of using a live-attenuated vaccine that is safe and can induce the appropriate protective immune responses without generating the pathology associated with progression of disease resulting in improved protective efficacy.
One cannot exclude the possibility, however, that virulence does not reflect virus fitness in this case.
