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Overview:
Diagnosis of Trichomonas vaginalis infection.
Garcia LS. Diagnostic Medical Parasitology. 4th ed. Washington, DC: ASM Press; 2001.
Leber AL, Novak SM. Intestinal and urogenital amebae, flagellates, and ciliates. In: Murray PA, ed. Manual of Clinical Microbiology. 7th ed. Washington, DC: ASM Press;1999.
Rein MF. Trichomonas vaginalis. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 5th ed. Philadelphia, Pa: Churchill Livingstone;2000.
Sorvillo F, Smith L, Kerndt P, et al.Trichomonas vaginalis, HIV, and African-Americans. Emerg Infect Dis. 2001; 7(6):927-932. PubMed 11747718
van Der Schee C, van Belkum A, Zwijgers L, et al. Improved diagnosis of Trichomonas vaginalis infection by PCR using vaginal swabs and urine specimen compared to diagnosis by wet mount microscopy, culture, and fluorescent staining. J Clin Microbiol. 1999 Dec; 37(12):4127-4130. PubMed 10565943
Collection Instructions:
Gen-Probe® Aptima® swab or Aptima® urine specimen transport; ThinPrep® or SurePath™ liquid cytology vial.
Vaginal swab: Care provider specimen: Collect vaginal fluid sample using the Gen-Probe® Aptima® vaginal swab kit by contacting the swab to the lower third of the vaginal wall and rotating the swab for 10 to 30 seconds to absorb fluid. Immediately place the swab into the transport tube and carefully break the swab shaft against the side of the tube. Tightly screw on the cap. Patient self-collection: Partially open the package of the Gen-Probe® Aptima® vaginal swab kit. Do not touch the soft tip or lay the swab down. If the soft tip is touched, the swab is laid down, or the swab is dropped, use a new Aptima® swab specimen collection kit. Remove the swab. Carefully insert the swab into the vagina about 2" past the introitus and gently rotate the swab for 10 to 30 seconds, making sure the swab touches the walls of the vagina so that moisture is absorbed by the swab. Withdraw the swab without touching the skin. Immediately place the swab into the transport tube and carefully break the swab shaft against the side of the tube. Tightly screw on the cap.
Endocervical swab: Remove excess mucus from the cervical os and surrounding mucosa using the cleaning swab (white shaft swab in the package with red printing). Discard this swab. Insert the specimen collection swab (blue shaft swab in the package with green printing) into the endocervical canal. Gently rotate the swab clockwise for 10 to 30 seconds in the endocervical canal to ensure adequate sampling. Withdraw the swab carefully; avoid contact with the vaginal mucosa. Remove the cap from the swab specimen transport tube and immediately place the specimen collection swab into the transport tube. Carefully break the swab shaft at the scoreline; use care to avoid splashing of the contents. Recap the swab specimen transport tube tightly.
Male urethral swab: The patient should not have urinated for at least one hour prior to specimen collection. Insert the specimen collection swab (blue shaft swab in the package with the green printing) 2 to 4 cm into the urethra. Gently rotate the swab clockwise for two to three seconds in the urethra to ensure adequate sampling. Withdraw the swab carefully. Remove the cap from the swab specimen transport tube and immediately place the specimen collection swab into the specimen transport tube. Carefully break the swab shaft at the scoreline; use care to avoid splashing of contents. Recap the swab specimen transport tube tightly.
Urine specimen: The patient should not have urinated for at least one hour prior to specimen collection. Direct patient to provide a first-catch urine (approximately 20 mL to 30 mL of the initial urine stream) into a urine collection cup free of any preservatives. Collection of larger volumes of urine may result in specimen dilution that may reduce test sensitivity; lesser volumes may not adequately rinse organisms into the specimen. Female patients should not cleanse the labial area prior to providing the specimen. Add urine to the Aptima® COMBO 2 urine collection device. The final volume must be between the two black lines on the device (about 2 mL).
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