Colonization of human genital tract by Streptococcus agalactiae.

This bacteriological study involved 92 young married couples who required medical help because of infertility. Colonization of male urethra or the presence of Streptococcus agalactiae in the ejaculate was detected in 9.78% of men. Vagina or vagina and cervix were colonized in 4.35% of women. Oral application of phenoxymethylpenicillin temporarily eliminated S. agalactiae from the genital tract of all colonized partners. Repeated colonization occurred 3-7 months later, in three cases by different serotypes compared with pretreatment period, in one case by the same serotype.