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Results of standardization of the multiplex PCR for detection of seven different sequences important for screening of group B Streptococcus infection (1—hypervirulent clone ST17; 2—12403 ATCC, III serotype; 3—BAA611 ATCC, V serotype; 4—strain with mef A/E gene; 5—strain with ermB gene; 6—11360 NCTC; Ia serotype; 7—the negative control)
