InPouch TV culture for detection of Trichomonas vaginalis (original) (raw)
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NTU Journal of Pure Sciences, 2023
Trichomoniasis has emerged as the most common sexually transmitted disease, and limited data is available on the effective screening technique for the diagnosis of Trichomonas vaginalis (T. vaginalis). This study aimed to compare the ability of two culture media (InPouch TV and Diamond's) to support the growth of clinical isolates of Trichomonas vaginalis and their relative sensitivity for detection of the organism. A total of 343 patients complaining of vaginal discharge of 293 women and urine sample of 50 men were included in the study. From December 2021 to May 2022, from Azadi Teaching Hospital, Private clinics, and Midwifery and Childbearing Hospital in Kirkuk. Three vaginal swabs and a urine sample were screened for trichomoniasis by wet mount microscopy. Diamond Media Culture and Pouch TV were used. The 343 cases studied, 6 women and 1 man were positive by wet mount microscopy, which means 7 (2%) and 336 (98%) were negative. Sterile vaginal swab with centrifugation and urine samples had the highest rate of specificity (85%) to detect TV compared to vaginal swab without centrifugation and Amies Gel Transport Media (AGT) media, which had a lower sensitivity (33% and 16%), respectively. Inpouch TV media was the best culture to grow TV and remained for 10 days, but Local Diamond Modified Media (LDMM) had a poor result for growth of trichomonas vaginalis and only remained alive for 2 days. According to our experiment, the most successful routes of detection are urine and vaginal swab with centrifugation, and Inpouch TV is the unique culture for growth and better than LDMM.
Journal of Clinical Microbiology, 2005
Trichomonas vaginalis infection is estimated to be the most widely prevalent nonviral sexually transmitted infection in the world. Wet-mount microscopy is the most common diagnostic method, although it is less sensitive than culture. The OSOM Trichomonas Rapid Test (Genzyme Diagnostics, Cambridge, Mass.) (referred to here as OSOM) is a new point-of-care diagnostic assay for T. vaginalis that uses an immunochromatographic capillary flow (dipstick) assay and provides results in 10 min. The purpose of this study was to determine the test characteristics of OSOM compared to those of a composite reference standard (CRS) comprised of wet-mount microscopy and T. vaginalis culture. This multicenter cross-sectional study enrolled sexually active women >18 years of age who presented with symptoms of vaginitis, exposure to T. vaginalis, or multiple sexual partners. Vaginal-swab specimens were obtained for T. vaginalis culture, wet mount, and rapid testing. The prevalence of T. vaginalis in this sample was 23.4% (105 of 449) by the CRS. The sensitivity and specificity of OSOM vaginal-swab specimens were 83.3 and 98.8%, respectively, while wet mount had a sensitivity and specificity of 71.4 and 100%, respectively, compared to the CRS. OSOM performed significantly better than wet mount (P ؍ 0.004) and detected T. vaginalis in samples that required 48 to 72 h of incubation prior to becoming culture positive. The performance of the rapid test was not affected by the presence of coinfections with chlamydia and gonorrhea. The OSOM Trichomonas Rapid Test is a simple, objective test that can be expected to improve the diagnosis of T. vaginalis, especially where microscopy and culture are unavailable.
Journal of Clinical Microbiology, 2005
Trichomonas vaginalis infection is estimated to be the most widely prevalent nonviral sexually transmitted infection in the world. Wet-mount microscopy is the most common diagnostic method, although it is less sensitive than culture. The OSOM Trichomonas Rapid Test (Genzyme Diagnostics, Cambridge, Mass.) (referred to here as OSOM) is a new point-of-care diagnostic assay for T. vaginalis that uses an immunochromatographic capillary flow (dipstick) assay and provides results in 10 min. The purpose of this study was to determine the test characteristics of OSOM compared to those of a composite reference standard (CRS) comprised of wet-mount microscopy and T. vaginalis culture. This multicenter cross-sectional study enrolled sexually active women >18 years of age who presented with symptoms of vaginitis, exposure to T. vaginalis, or multiple sexual partners. Vaginal-swab specimens were obtained for T. vaginalis culture, wet mount, and rapid testing. The prevalence of T. vaginalis in this sample was 23.4% (105 of 449) by the CRS. The sensitivity and specificity of OSOM vaginal-swab specimens were 83.3 and 98.8%, respectively, while wet mount had a sensitivity and specificity of 71.4 and 100%, respectively, compared to the CRS. OSOM performed significantly better than wet mount (P ؍ 0.004) and detected T. vaginalis in samples that required 48 to 72 h of incubation prior to becoming culture positive. The performance of the rapid test was not affected by the presence of coinfections with chlamydia and gonorrhea. The OSOM Trichomonas Rapid Test is a simple, objective test that can be expected to improve the diagnosis of T. vaginalis, especially where microscopy and culture are unavailable.
Journal of Clinical Microbiology, 2008
The OSOM Trichomonas rapid test (OSOM Trich) was compared to the wet preparation examination (WP) for the detection of Trichomonas vaginalis vaginitis in women with a low prevalence of infection. A total of 19/1,009 (2%) women had T. vaginalis infection. OSOM Trich had very good performance, with sensitivity, specificity, efficiency, positive predictive value, and negative predictive value of 94.7, 100, 99.9, 100, and 99.9%, respectively. The implementation of OSOM Trich would decrease labor costs.
European Journal of Obstetrics & Gynecology and Reproductive Biology, 2006
Objectives: The aim of this study was to compare wet mount-, Giemsa stain-, acridine orange fluorescent stain-, cultivation-and polymerase chain reaction (PCR)-based approaches to establish which method or combination of methods was most effective in the laboratory diagnosis of trichomoniasis. Study design: Out of 200 investigated patients with various gynecological complaints, Trichomonas vaginalis infection was detected in 27 (13.5%) by any of methods investigated. Among women with trichomonads, a typical clinical finding was presented in only nine. For analysis of sensitivity and specificity of the methods used, the receiver operating characteristic (ROC) curve concept with culture as a gold standard was applied. Results: Infection was diagnosed by wet mount in 14 (7.0%) women, by Giemsa stain in 11 (5.5%) and by acridine orange stain in 16 (8.0%) women. In 21 (10.5%) women, it was diagnosed by culture in Diamond's medium, and in 22 (11.0%) by PCR. For the initial diagnosis of trichomoniasis, wet preparation is the test that is widely available in most STD clinics, but its sensitivity is poor (66.67%). Giemsa stain shows a low sensitivity of 52.38%. Acridine orange shows reasonable sensitivity and specificity of 71.43% and 99.44%, respectively. The sensitivity and specificity of PCR (80.95% and 97.21%) did not exceed that of culture. Conclusion: With regard to the fact that trichomoniasis can have an atypical or even asymptomatic course, in order to accurately diagnose this disease, microbiological investigation is necessary. Comparison of different methods showed that at least two techniques, such as culture and acridine orange staining, have the potential for better diagnosis of T. vaginalis infection. PCR detection of infection has been demonstrated to be highly specific and sensitive, but its availability and cost effectiveness are in question. PCR could provide an alternative for laboratory diagnosis of trichomoniasis by culture. #
Comparison of Three Diagnostic Methods for Trichomonas vaginalis Detection in a Low-Resource Setting
Journal of Advances in Medicine and Medical Research
Aims: To comparatively evaluate the efficiency of three simple trichomoniasis diagnostic techniques in a low-resource setting at the Baixada Fluminense region, Province of Rio de Janeiro, Brazil. Place and Duration of Study: The sample was obtained from the medical records of women attending the Iguaçu University Clinic's Gynaecology Outpatient Clinic from January to December 2020. The sample consisted of medical records of 135 women aged 17 to 78 years. Methodology: With the aid of a sterile and disposable bi-valve speculum, vaginal secretion was collected with a swab from the vaginal sac. The secretion was used for smears in two slides for wet mount examination and Papanicolaou staining and then seeded in a tube with 6 ml of Diamond's culture medium. Results: The results showed that among the 135 women with clinical signs of vulvovaginitis, 65 (48.15%) were infected by Trichomonas vaginalis. The positivity rates displayed significant differences according to the detection ...
Diagnosis of Trichomonas vaginalis infection by PCR
2007
Objective: To compare the sensitivity of PCR, wet preparation and culture in detecting Trichomonas vaginalis in urine and vaginal fluid. Methods: A PCR targeting the beta-tubulin genes of T. vaginalis was used for the detection of the organism in both vaginal swab and urine specimens from infected patients. Random urine samples were collected from 30 patients (23 females and 7 males), and tested for T. vaginalis by wet preparation and the Inpouch T. vaginalis culture systeme. Two vaginal swabs were collected by each woman. PCR detection. was carried out on samples negative by first methods. Results: The positive result was found in 28.57% in male urine and 39.13% in female urine samples, 65.21% in 1st swab and 78.26 % in 2nd swab by wet preparation. By culture, the male urine samples showed 42.85% positive, female urine 69.56% while 1st swab showed 86.95% positive and 2nd swab 91.30% positive. All negative cases by culture in urine and vaginal samples were tested by PCR, which showe...
BMC Women's Health
Background: There is little data on Trichomonas vaginalis infection in Ghana. This study evaluated the prevalence of trichomoniasis using different diagnostic methods and determined the risk factors for infection in patients. Methods: A structured questionnaire was administered. Vaginal swabs, urethral swabs and urine specimens were obtained from consenting patients; and the samples processed following standard protocols. The presence of T. vaginalis was determined using wet mount microscopy and polymerase chain reaction (PCR) as gold standard. We also assessed the diagnostic performance the JD's Trichomonas V® rapid antigen test to inform clinical practice. Results: The PCR assay detected T. vaginalis positivity in 64 of 150 patients (42.6, 95%CI:35.0, 50.6) including all positive samples of wet mount microscopy and JD's Trichomonas V® test. Wet mount microscopy showed low sensitivity (31.6%), high specificity (100%), moderate positive predictive value (75.0%), moderate positive likelihood ratio (3.0), and weak agreement (Cohen's kappa, 0.283) with PCR assay. The JD's Trichomonas V® test displayed lower sensitivity (25.0%), specificity (83.3%), and weaker measure of agreement (Cohen's kappa, 0.233) with PCR. In multivariate analysis, the strongest independent predictor for T. vaginalis was female gender [adjusted odds ratio (AOR), 24.89; 95% confidence interval (CI): 10.58, 51.21; P-value< 0.001]. Knowledge of STI showed a protective effect against infection with the parasite (AOR, 0.13; 95%CI: 0.07, 0.29; P-value< 0.017). Conclusion: The sensitivity of wet mount microscopy was low for T. vaginalis screening in our region. The JD's Trichomonas V® test should not be considered as an alternative test. We recommend mandatory PCR assay for confirmation of negative wet mount results.