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Trichomoniasis: Sensitivity and Specificity

Introduction: Trichomoniasis is a common sexually transmitted disease caused by Trichomonas vaginalis.

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Tags: Gynecologic Infection Tag this Diagnosis.

Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Women age 14-49, United States 3% Trichomonas vaginalis infection detected by PCR of self-collected vaginal swabs by 3754 women.

Clin Infect Dis. 2007 Nov 15;45(10):1319-26.

66%
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The sensitivity and specificity of findings for Trichomoniasis are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Sensitive and Specific Findings
FindingResult SensitivitySpecificity
[ + ] Affirm VP III Microbial Identification System + 0 - 90%99%
[ + ] Transcription-mediated amplification testing + 0 - 98%98%
[ + ] OSOM Trichomonas Rapid Test + 0 - 88%98%
[ + ] Culture on Diamond's Medium + 0 - 95%95%
Specific Findings
FindingResult SensitivitySpecificity
[ + ] Clinical diagnosis + 0 - 84.6%99.6%
[ + ] Trichomonads on liquid-based Pap smear + 0 - 61%99%
[ + ] Trichomonads on liquid-based Pap smear + 0 - 57%97%
Poorly Diagnostic Findings
FindingResult SensitivitySpecificity
[ + ] Vaginal pH + 0 - 56%50%
[ + ] Wet Mount Sensitivity = 65%
[ + ] Strawberry Cervix Sensitivity = 5%