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PCR detection of biovar specificity and pathogenicity determinants has been performed in order to analyze the structural components of the genome of V. cholerae El Tor strains (n = 90) isolated during epidemic outbreaks in Siberia and the Far East, and the nucleotide sequence of the ctxB gene and the structure of ctxAB gene promoter region have been determined. As a result, toxicogenic strains V. cholerae...
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