Abstract
The presence of Chlamydia trachomatis-related deoxyribonucleic acid sequences in endocervical specimens of 317 women was analyzed by deoxyribonuclei acid hybridization techniques with deoxyribonucleic acid from C. trachomatis used as probes. Samples from 56 of 172 high-risk patients (32.6%) and 16 of 145 low-risk patients (11.0%) contained C. trachomatis-related deoxyribonucleic acid sequences. Direct detection of chlamydial antigen with enzyme-linked immunoassay on the same patients yielded positive rates of 26.3% and 7.3% for the high- and low-risk patients, respectively. C. trachomatis culture confirmed 86.3% of deoxyribonucleic acid-positive results and 84.0% of antigen-positive results. The overall sensitivities of chlamydial deoxyribonucleic acid and antigeh assays were 91.7% and 68.8%, respectively, whereas the specificities were 95.3% and 94.7%. Results also suggested that the test of the C. trachomatis deoxyribonucleic acid correlated better with the female urogenital chlamydial infections than did the antigen test of C. trachomatis. The combined results of higher sensitivity in detecting the microorganism and better correlation with disease activity may make the deoxyribonucleic acid hybridization test a useful tool for the early and accurate diagnosis of C. trachomatis infections in female patients.
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