Concordance of rectal and cervical Chlamydia trachomatis OmpA genotypes infecting women in Birmingham, Alabama

We evaluated cervical and rectal Chlamydia trachomatis OmpA genotypes isolated from 22 women in Birmingham, AL, who were infected at both sites. Two women had mixed infection at one site. Of 20 women infected with a single OmpA genotype at each site, four (20%) had discordant genotypes at these sites.