| analysis of phenotype, genotype and serotype distribution in erythromycin-resistant group b streptococci isolated from vaginal flora in southern ireland. | the screening of 2000 women of childbearing age in cork between 2004 and 2006 produced 37 erythromycin-resistant group b streptococcus (gbs) isolates. pcr analysis was performed to determine the basis for erythromycin resistance. the ermtr gene was most frequently expressed (n = 19), followed by the ermb gene (n = 8). four isolates harboured the mefa gene. six isolates yielded no pcr products. some phenotype-genotype correlation was observed. all isolates expressing the mefa gene displayed the m ... | 2010 | 19602300 |