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  • Title: Three-year history of transcription-mediated amplification-based Trichomonas vaginalis analyte-specific reagent testing in a subacute care patient population.
    Author: Napierala M, Munson E, Munson KL, Kramme T, Miller C, Burtch J, Olson R, Hryciuk JE.
    Journal: J Clin Microbiol; 2011 Dec; 49(12):4190-4. PubMed ID: 21998416.
    Abstract:
    A total of 7,899 specimens submitted for live clinical Trichomonas vaginalis analyte-specific reagent (ASR) screening from 2008 to 2010 were audited on the basis of patient gender, specimen source, molecular Neisseria gonorrhoeae and Chlamydia trachomatis results, and relative light unit (RLU) data yielded by T. vaginalis ASR. Only 1.4% of the screening was ordered by emergency department clinicians. The screening volume in 2010 was 126% higher than that in 2008. The proportions of annual female and male screening remained consistent throughout the 3-year interval (∼92 and 8%, respectively). Although 71.8 and 9.5% of screening was performed on endocervical and vaginal specimens, respectively, over the 3-year period, no significant difference was noted in the T. vaginalis detection rates (8.9 and 8.6%, P = 0.85). Increased T. vaginalis detection was derived from female urine specimens (12.6%) compared to female genital swabs (P = 0.0004). The proportion of female urine screening increased during the 3-year interval (P < 0.0002). T. vaginalis detection rate in males was 6.6%, with no difference between urethral and urine T. vaginalis detection (P = 0.53). The mean RLU value for 714 positive specimens was 3,971,441; analogous values for each female specimen source and combined male source testing showed no variance (P ≥ 0.29). Combined-gender T. vaginalis detection rate (9.1%) was significantly greater than those of C. trachomatis (5.9%) and N. gonorrhoeae (1.5%; P < 0.0002). Equivocal results presented at a rate of 0.4%. T. vaginalis ASR is an increasingly utilized assay that yields higher detection rates than other sexually transmitted infection etiologies in this community subacute care setting.
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