Reappraisal of the taxonomy of Streptococcus suis serotypes 20, 22, 26, and 33 based on DNA-DNA homology and sodA and recN phylogenies.

To date, Streptococcus suis was divided into thirty-three serotypes based on its polysaccharide capsular antigens. Although 16S rRNA sequence similarities of serotypes 20, 22, 26, and 33 reference strains to the type strain NCTC 10234(T) were below the threshold value of 98.5% to assign them to S.

Phenotypic and genotypic characterization of Vibrio cholerae clinically isolated in Surabaya, Indonesia.

The phenotypic and genotypic characteristics of 6 clinical strains of Vibrio cholerae isolated in Surabaya, Indonesia in 2009 were examined. The DNA fingerprints obtained suggested that these isolates were not from a single clone. Furthermore, all isolates produced cholera toxin and possessed the classical type of toxin B subunit gene, thus meaning that this is the first report of the occurrence of El Tor variants of V.