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Journal of Clinical Microbiology, October 2000, p. 3585-3588, Vol. 38, No. 10
Departments of Medicine/Infectious
Diseases1 and
Microbiology,2 University of Alabama at
Birmingham, Birmingham, Alabama 35294, and Jefferson County
Department of Health, Birmingham, Alabama 352023
Received 17 May 2000/Returned for modification 4 July 2000/Accepted 8 August 2000
Vaginal trichomonosis is a highly prevalent infection which has
been associated with human immunodeficiency virus acquisition and
preterm birth. Culture is the current "gold standard" for diagnosis. As urine-based testing using DNA amplification techniques becomes more widely used for other sexually transmitted diseases (STDs)
such as gonorrhea and chlamydia, a similar technique for trichomonosis
would be highly desirable. Women attending an STD clinic for a new
complaint were screened for Trichomonas vaginalis by
wet-preparation (wet-prep) microscopy and culture and for the presence
of T. vaginalis DNA by specific PCR of vaginal and urine specimens. The presence of trichomonosis was defined as the detection of T. vaginalis by direct microscopy and/or culture from
either vaginal samples or urine. The overall prevalence of
trichomonosis in the population was 28% (53 of 190). The sensitivity
and specificity of PCR using vaginal samples were 89 and 97%,
respectively. Seventy-four percent (38 of 51) of women who had a
vaginal wet prep or vaginal culture positive for trichomonads had
microscopic and/or culture evidence of the organisms in the urine. Two
women were positive for trichomonads by wet prep or culture only in the
urine. The sensitivity and specificity of PCR using urine specimens
were 64 and 100%, respectively. These results indicate that the
exclusive use of urine-based detection of T. vaginalis is
not appropriate in women. PCR-based detection of T. vaginalis using vaginal specimens may provide an alternative to culture.
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Detection of Trichomonosis in Vaginal and Urine
Specimens from Women by Culture and PCR
*
Corresponding author. Mailing address: Zeigler Research
Building #239, 703 19th St. South, Birmingham, AL 35294-0007. Phone: (205) 975-5665. Fax: (205) 975-7764. E-mail:
Jane.Schwebke{at}ccc.uab.edu.
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