Cultural and serological studies have provided limited, often conflicting, evidence of a role for mycobacteria in

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Two immunofluorescence tests were compared for detecting antibodies to chlamydiae. The inclusion antigen test was more sensitive, detecting antibodies in more sera and at higher titres. The micro-IF test was more specific, differentiating between antibodies to C. trachomatis and those to C.IOL 207. Antibodies to this non-genital chlamydial type accounted for half the positive results. These antibodies can cause the prevalence of C. trachomatis infections to be over estimated when genus-specific serology tests are used.

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