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. 1997 Jun;35(6):1536–1540. doi: 10.1128/jcm.35.6.1536-1540.1997

Detection of Neisseria gonorrhoeae and Chlamydia trachomatis in genitourinary specimens from men and women by a coamplification PCR assay.

K A Crotchfelt 1, L E Welsh 1, D DeBonville 1, M Rosenstraus 1, T C Quinn 1
PMCID: PMC229782  PMID: 9163477

Abstract

A coamplification PCR test for the direct detection of Neisseria gonorrhoeae and Chlamydia trachomatis in urethral and endocervical swabs and urine samples from men and women was compared to standard culture techniques. Processed specimens were amplified in single reaction tubes containing primers for both organisms, and PCR products were detected by a colorimetric microwell plate hybridization assay specific for each pathogen. Of 344 specimens from men, 45 (13.1%) urine specimens were PCR positive for C. trachomatis, 51 (14.8%) urethral swab specimens were PCR positive, and 29 urethral swab specimens (8.4%) were culture positive. After analysis of discrepancies, the resolved sensitivity and specificity of PCR for C. trachomatis were 96.2 and 99.3%, respectively, in urethral swab specimens, compared to 88.2 and 98.6% for urine specimens. Of the 192 specimens from women, 28 (14.6%) urine specimens were PCR positive for C. trachomatis, 32 (16.7%) endocervical specimens were PCR positive, and 19 (9.9%) endocervical specimens were culture positive. After analysis of discrepancies, the resolved sensitivity and specificity of PCR for C. trachomatis for endocervical specimens were both 100% compared to 100 and 99.4%, respectively, for urine specimens from women. In men, 68 (19.8%) urine specimens were PCR positive for N. gonorrhoeae, 73 (21.2%) urethral swabs were PCR positive, and 59 (17.2%) urethral swabs were culture positive. After analysis of discrepancies, the resolved sensitivity and specificity of PCR for N. gonorrhoeae were 97.3 and 97.0%, respectively, for urethral specimens compared to 94.4 and 98.5% for urine specimens. In women, 18 (9.4%) urine specimens were PCR positive for N. gonorrhoeae, 23 (12.0%) were endocervical swab PCR positive, and 15 (7.8%) endocervical specimens were culture positive. After analysis of discrepancies, the resolved sensitivity and specificity of PCR for N. gonorrhoeae were 100 and 99.4%, respectively, for endocervical specimens compared to 90.0 and 95.9% for female urine specimens. These results indicate that a multiplex PCR is highly sensitive for detecting both C. trachomatis and N. gonorrhoeae from a single urine or genital swab, providing a more cost-effective way of screening multiple pathogens.

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Selected References

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