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Journal of Clinical Microbiology, December 1999, p. 4127-4130, Vol. 37, No. 12
Department of Medical Microbiology and
Infectious Diseases1 and Department of
Dermatology and Venereology,2 Erasmus University
Medical Center Rotterdam, 3015 GD Rotterdam, The Netherlands
Received 24 June 1999/Returned for modification 3 August
1999/Accepted 27 August 1999
Four vaginal cotton swab specimens were obtained from each of 804 women visiting the outpatient sexually transmitted disease clinic of
the Erasmus University Medical Center Rotterdam, Rotterdam, The
Netherlands, for validation of various forms of Trichomonas vaginalis diagnostic procedures. One swab specimen was
immediately examined by wet mount microscopy, a second swab was placed
in Kupferberg's Trichosel medium for cultivation, and two swabs were placed in phosphate-buffered saline (PBS), pH 7.2. The resulting PBS
suspension was used for direct staining with acridine orange and
fluorescence microscopy, inoculation of modified Diamond's culture
medium, and a PCR specific for T. vaginalis. A total of 70 samples positive in one or more of the tests were identified: 31 (3.8%) infections were detected by wet mount microscopy, and 36 (4.4%) were identified by acridine orange staining, as opposed to 40 (4.9%) and 46 (5.7%) positives in modified Diamond's and Trichosel
media, respectively. PCR was positive for 61 (7.5%) samples. Secondly,
from each of 200 women were obtained a urine sample and a vaginal
cotton swab specimen, and 200 urine samples were obtained from men. For
the women, 15 (7.4%) of the samples showed a positive result for
either the wet mount (n = 1), Trichosel culture
(n = 6), PCR on the vaginal swab sample
(n = 10), or PCR on the urine specimen
(n = 11). Four men (2%) were diagnosed with a
T. vaginalis infection. Thus, PCR appears to be the method
of choice for the detection of genital infections with T. vaginalis.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Improved Diagnosis of Trichomonas
vaginalis Infection by PCR Using Vaginal Swabs and Urine Specimens
Compared to Diagnosis by Wet Mount Microscopy, Culture, and
Fluorescent Staining
*
Corresponding author. Mailing address: Department of
Medical Microbiology and Infectious Diseases, Erasmus University
Medical Center Rotterdam, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands. Phone: 31-10-4635813. Fax: 31-10-4633875. E-mail: vanbelkum{at}bacl.azr.nl.
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