[Vibrio cholerae strains certification].
Certification of V. cholerae strains stored at State collection of pathogenic microorganisms and cell cultures SCPM - Obolensk. 50 V. cholerae strains were studied. Real-time PCR with primers to genes ctxA, ctxB, ace, zot, tcpA, toxR, hlyA, rtxC, rfbO1, ompU, ompW was used. Membership of the studied strains in V. cholerae species was confirmed by molecular-biological methods. 46 strains belong to O1 serogroup, 42 of those - E1 Tor toxigenic, having all the virulence genes and 4 non-toxigenic strains. A strain had ace, zot, tcpA, toxR, rtxC, hlyA, ompU genes. 2 strains had ace, toxR, rtxC, hlyA genes, a strain had only toxR gene which is a global regulatory gene. 2 of the 4 serogroup O1 strains were non-toxigenic and had all the virulence genes (ctxA, ctxB, ace, zot, tcpA, toxR, rtxC, hlyA, ompU). 1 non-toxigenic strain has ace, zot, toxR, hlyA, ompUgenes, and the other - toxR, hlyAgenes. Genome certificates of all the V. cholerae strains stored in State collection of pathogenic microorganisms and cell cultures SCPM - Obolensk were created. Markers of epidemic threat - ctxA, ctxB, tcpA, toxR and additional virulence genes were determined.