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Journal of Clinical Microbiology, 02 1995, 455-457, Vol 33, No. 2
KR Smith, S Ching, H Lee, Y Ohhashi, HY Hu, HC Fisher 3rd and EW Hook 3rd
The high sensitivity of nucleic acid amplification tests such as ligase
chain reaction (LCR) has the potential to simplify specimen collection for
the microbiologic diagnosis of gonorrhea. We screened first-void urine
specimens from 283 women attending a Birmingham, Ala., sexually transmitted
disease (STD) clinic by using LCR and compared the results to those of
cervical and urethral cultures for gonorrhea diagnosis. Fifty-three (18.7%)
women had positive cervical cultures for gonorrhea, and 41 of the 53 (77%)
also had positive urethral cultures. One additional patient had only a
positive urethral culture (the cervical gonorrhea culture was negative).
LCR testing of urine specimens for gonorrhea yielded positive results for
51 of 54 (94.4%) women with positive cervical or urethral cultures. Of 229
women with both urethral and cervical cultures negative for gonorrhea, 2
(0.8%) had positive urine LCR results as well. To resolve the discrepancies
between urine LCR and culture results, LCR tests of simultaneously
collected urethral and cervical swab specimens and LCR tests of the same
urine specimens using different nucleotide primers were conducted. After
evaluation of five discrepant results, the sensitivity, specificity,
positive predictive value, and negative predictive value of LCR for the
detection of gonorrhea in urine specimens were 94.6%, 100%, 100%, and
98.7%, respectively. We conclude that urine LCR testing for Neisseria
gonorrhoeae is a practical alternative to culture for the detection of
gonorrhea in women. Urine testing for STD diagnosis has the potential to
simplify and expand the opportunities for STD screening and surveillance of
women.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Evaluation of ligase chain reaction for use with urine for identification of Neisseria gonorrhoeae in females attending a sexually transmitted disease clinic
University of Alabama at Birmingham 35294-0006.
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