Test Catalog

Test ID: MTRNA    
Trichomonas vaginalis, Nucleic Acid Amplification, Varies

Useful For Suggests clinical disorders or settings where the test may be helpful

Detection of Trichomonas vaginalis in urine and male patient specimens

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

Trichomonas vaginalis (TV) is a protozoan parasite that commonly infects the genital tract of men and women. It is now considered to be the most common curable sexually transmitted infection (STI) agent, with an estimated 3.7 million infected individuals in the United States.(1-4) Although up to 70% of infected individuals are asymptomatic, infections may be associated with vaginitis, urethritis, and cervicitis in women, and urethritis and prostatitis in men.(3) Patients that are infected with T vaginalis have an increased risk of acquiring other sexually transmitted infections such as HIV, while infections in pregnant women are associated with premature labor, low birth-weight offspring, premature rupture of membranes, and post-hysterectomy/post-abortion infection.(3)


Symptoms of T vaginalis overlap considerably with other sexually transmitted infections; therefore, laboratory diagnosis is required for definitive diagnosis. The most commonly used method for detection is microscopic examination of a wet-mount preparation of vaginal secretions. However, this method has only 35% to 80% sensitivity compared with culture.(5) Culture also suffers from relatively low sensitivity (38%-82%) when compared to molecular methods.(5) Culture is technically challenging and takes 5 to 7 days to complete. Molecular methods, such as the Aptima T vaginalis assay, offer high sensitivity and specificity for detection of trichomoniasis. The Aptima test utilizes target capture, transcription-mediated amplification (TMA), and hybridization protection assay (HPA) technologies for detection of T vaginalis ribosomal RNA (rRNA).

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.


Interpretation Provides information to assist in interpretation of the test results

A positive result is considered indicative of current or recent Trichomonas vaginalis infection (trichomoniasis).

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

This assay is not FDA approved for urine and specimens collected from male patients. However, the performance characteristics of this test have been established by Mayo Clinic in accordance with CLIA-guidelines.


Reliable results are dependent on adequate specimen collection. Because the transport system used for this assay does not permit microscopic assessment of specimen adequacy, training of clinicians in proper specimen collection techniques is necessary.


Therapeutic failure or success cannot be determined with the APTIMA Trichomonas vaginalis assay since nucleic acid may persist following appropriate antimicrobial therapy.


Results from the APTIMA T vaginalis assay should be interpreted in conjunction with other clinical data and symptoms.


A negative result does not preclude a possible infection because results are dependent on adequate specimen collection. Test results may be affected by improper specimen collection, pre-analytical errors, technical errors, or target levels below the assay limit of detection. Furthermore, a negative result does not preclude a possible infection because the presence of Trichomonas tenax or Pentatrichomonas hominis in a specimen may affect the ability to detect T vaginalis rRNA.


Assay performance of the APTIMA T vaginalis assay has not been evaluated in the presence of Dientamoeba fragilis.

Clinical Reference Recommendations for in-depth reading of a clinical nature

1. Weinstock H, Berman S, Cates W Jr: Sexually transmitted diseases among American youth: incidence and prevalence estimates, 2000. Perspect Sex Reprod Health. 2004 Jan-Feb;36(1):6-10

2. Soper D: Trichomoniasis: under control or undercontrolled? Am J Obstet Gynecol. 2004 Jan;190(1):281-290

3. Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention: Trichomoniasis-CDC Fact Sheet. Centers for Disease Control and Prevention (CDC); Reviewed February 27, 2020. Accessed September 10, 2020. Available at www.cdc.gov/std/trichomonas/stdfact-trichomoniasis.htm

4. Schwebke JR, Burgess D: Trichomoniasis. Clin Microbiol Rev. 2004 Oct;17(4):794-803

5. Wendel KA, Erbelding EJ, Gaydos CA, Rompalo AM: Trichomonas vaginalis polymerase chain reaction compared with standard diagnostic and therapeutic protocols for detection and treatment of vaginal trichomoniasis. Clin Infect Dis. 2002 Sep;35(5):576-580