Pathogenicity of nine human Yersinia enterocolitica isolates of Iran were
tested by serological tests and molecular approaches. Of these nine
isolates two harbored a plasmid (1478 & 1479). These two isolates showed
different patterns of total proteins compared with others.
Autoagglutination (AA) and resistance to the bactericidal effect of human
serum tests(SR) used to differentiate between virulent and avirulent isolates
of Y. enterocolitica. Isolates 1478 and 1479 showed to be AA+ / SR+ where
as others were AA- / SR- .
With these findings it is evident that the serological tests can be used to
identify virulent from avirulent isolates.
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