Comparison of an automated enzyme immunoassay with a direct fluorescent antibody test and polymerase chain reaction for the detection ofChlamydia trachomatis in diagnostic specimens from male patients

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Abstract
Endourethral swabs and first-pass urine (FPU) samples from 148 male patients were tested forChlamydia trachomatis by an automated enzyme immunoassay (EIA) (Vidas; bioMérieux, France), a direct fluorescent antibody (DFA) test (MicroTrak; Syva, USA) and two polymerase chain reaction (PCR) methods.Chlamydia trachomatis was considered present if a specimen was positive by at least two methods. This expanded criterion identified 27 patients (18%) as truly infected. One of the PCR methods was most sensitive for both types of specimen. When the recommended cut-off value of Vidas was reduced by 50%, its sensitivity on endourethral swabs was comparable to that of the DFA test, but the DFA test performed better with FPU. In general, FPU was suitable only for PCR.

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