Genetic difference between Streptococcus suis serotype 2 virulent strain and avirulent strain by suppression subtractive hybridization
Finally FCT10.10 was selected as the highest virulent strain for production.
Half of the victims have been hospitalised, a high rate that may indicate an especially virulent strain of E. coli.
The authors argue the version of the disease that caused the medieval plague is likely extinct, but suggest that further study could reveal how it may have evolved into a less virulent strain.
One in five lung cancer sufferers have a particularly virulent strain called small cell lung cancer which kills all but three per cent of sufferers within five years of diagnoses.
"At this point, there isn't a lot of data to suggest this is a more virulent strain, " said Dr. Ian Williams of the Centers for Disease Control and Prevention.
The virulent strains had a polysaccharide capsule and formed smooth colonies on AGAR medium.
