One hundred eighty-five women college students were examined for genital infection with Chlamydia trachomatis. This organism was isolated from nine (5%) of the 185 women. Antibody was demonstrated in the genital secretions of 26 (14%) and in the serum of 70 (38%) of the women. None of the sexually inexperienced women was infected. Among those sexually experienced, the prevalence of isolation of C. trachomatis and of detection of local antibodies in cervical secretions and serum antibodies to C. trachomatis increased in relation to the number of life-time sexual partners. Local antibody appeared to be a more reliable indicator of infection with C. trachomatis than serum antibody in this college population.
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