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Journal of Clinical Microbiology, January 2002, p. 89-95, Vol. 40, No. 1
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.1.89-95.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Development and Validation of a PCR-Based Enzyme-Linked Immunosorbent Assay with Urine for Use in Clinical Research Settings To Detect Trichomonas vaginalis in Women

S. Cornelia Kaydos,1 Heidi Swygard,2 Shelly L. Wise,2 Arlene C. Sena,2,3 Peter A. Leone,2,4 William C. Miller,1,2 Myron S. Cohen,2,5 and Marcia M. Hobbs2,5*

Departments of Epidemiology,1 Medicine,2 Durham County Health Department, Durham,3 Wake County Human Services, Raleigh, North Carolina,4 Microbiology & Immunology, University of North Carolina at Chapel Hill, Chapel Hill5

Received 6 August 2001/ Returned for modification 27 September 2001/ Accepted 14 October 2001

Trichomonas vaginalis infection is highly prevalent worldwide and is associated with poor birth outcomes and enhanced human immunodeficiency virus transmission. Traditional detection methods rely on microscopic examination of vaginal specimens (wet mount) and culture, which can be insensitive and time-consuming. More than 3,000 women attending two sexually transmitted disease clinics were enrolled in this cross-sectional study to evaluate urine-based PCR for detection of T. vaginalis using a combined reference standard of wet mount and culture from vaginal swab. The prevalence of trichomoniasis in the population was 16.7% (502 of 3,009 women) using the reference standard. PCR with urine combined with agarose gel-based detection was 66.9% sensitive and 98.3% specific compared to the reference standard. Detection of PCR products using an unlabeled enzyme-linked immunosorbent assay (ELISA) improved the sensitivity to 86.4%, but specificity fell to 86.1%. Using a digoxigenin-labeled ELISA for detection of amplified T. vaginalis DNA from urine, the sensitivity and specificity of the PCR improved to 90.8 and 93.4%, respectively, compared to wet mount or culture from vaginal swabs. For clinical research settings in which vaginal specimens are not available and culture conditions are not feasible, urine-based PCR-ELISA may be useful for the detection of trichomoniasis in women.

* Corresponding author. Mailing address: Department of Medicine, Campus Box 7030, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599. Phone: (919) 966-5050. Fax: (919) 966-6714. E-mail: mmhobbs{at}med.unc.edu.

Journal of Clinical Microbiology, January 2002, p. 89-95, Vol. 40, No. 1
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.1.89-95.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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