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Yamazaki T, Sawai K, Takahashi Y, Matsuo J. Characterization of Actin-based Genotypes and Mycoplasma Endosymbionts of Trichomonas vaginalis Isolated in Sapporo, Japan. Acta Parasitol 2024; 69:1324-1328. [PMID: 38775916 DOI: 10.1007/s11686-024-00853-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 04/24/2024] [Indexed: 06/18/2024]
Abstract
PURPOSE Trichomonas vaginalis is a causative agent of common non-viral sexually transmitted infections worldwide. However, the biological features, such as genotypes and endosymbionts, of T. vaginalis isolated in Japan remain unclear. The aim of this study was to characterize the actin-based genotypes and the endosymbionts of T. vaginalis isolated in Sapporo, Japan. METHODS Three T. vaginalis clinical strains were isolated in Sapporo, Japan between 2019 and 2022. Actin-based genotyping was conducted by sequencing and phylogenetic analyses. The endosymbionts, such as Mycoplasma sp. and Trichomonasvirus, were detected using PCR and RT-PCR, respectively. Furthermore, the detected Mycoplasma spp. were identified using 16S rRNA gene sequencing. RESULTS Of the three T. vaginalis strains, two belonged to genotype E, whereas one was genotype G as determined by actin-based genotyping. Two of the T. vaginalis strains harbored Mycoplasma spp. Using nearly full-length 16S rRNA gene sequencing, both were identified as Candidatus Mycoplasma girerdii. In contrast, the Trichomonasvirus was not found in the T. vaginalis strains. CONCLUSION To our knowledge, this is the first report on the characterization of actin-based genotypes and the presence of endosymbiotic Ca. M. girerdii in T. vaginalis strains in Japan. Thus, this study will provide an important impetus for future research.
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Affiliation(s)
- Tomohiro Yamazaki
- School of Medical Technology, Health Sciences University of Hokkaido, Ainosato 2-5, Kita-ku, 002-8072, Sapporo, Japan
| | - Kyohei Sawai
- Department of Clinical Laboratories, Sapporo City General Hospital, 1-1, North-11, West-13, Chuo-ku, 060-8604, Sapporo, Japan
| | - Yuji Takahashi
- School of Medical Technology, Health Sciences University of Hokkaido, Ainosato 2-5, Kita-ku, 002-8072, Sapporo, Japan
| | - Junji Matsuo
- School of Medical Technology, Health Sciences University of Hokkaido, Ainosato 2-5, Kita-ku, 002-8072, Sapporo, Japan.
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Yang Z, Wang J, Qi Y, Shi Y, Li F, Wang W, Tian X, Mei X, Zhang Z, Wang S. A novel detection method based on MIRA-CRISPR/Cas13a-LFD targeting the repeated DNA sequence of Trichomonas vaginalis. Parasit Vectors 2024; 17:14. [PMID: 38191422 PMCID: PMC10775430 DOI: 10.1186/s13071-023-06106-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/18/2023] [Indexed: 01/10/2024] Open
Abstract
BACKGROUND Trichomonas vaginalis is a protozoan parasite, widely recognized as the most prevalent non-viral sexually transmitted infection (STI) globally. This infection is linked to various complications, including pelvic inflammatory disease, adverse pregnancy outcomes, and an increased risk of acquiring HIV. Current molecular detection methods for T. vaginalis are often costly and technically challenging. METHODS We developed a novel detection method for T. vaginalis using a multi-enzyme isothermal rapid amplification-clustered regularly interspaced short palindromic repeats (MIRA-CRISPR)/Cas13a-lateral flow device (LFD). This assay targets the repeated DNA sequence (GenBank: L23861.1) of T. vaginalis and is performed at a constant temperature of 37 °C for approximately 1 hour. RESULTS The detection limit of genomic DNA (gDNA) using our protocol was 1 × 10-4 ng/μl. Specificity was confirmed by the absence of cross-reaction with gDNA from various other microorganisms such as Staphylococcus aureus, Lactobacillus taiwanensis, Escherichia coli, Monilia albicans, Giardia lamblia, or Toxoplasma gondii. Among 30 clinical samples tested, the positive rates of T. vaginalis detection were 33.33% (10/30) by wet mount microscopy, 40% (12/30) by nested polymerase chain reaction (PCR), 40% (12/30) by MIRA-CRISPR/Cas13a-LFD, and 40% (12/30) by the culture method. Compared with the culture method, the gold standard for diagnosing trichomoniasis, wet mount microscopy showed a sensitivity of 83.3% and moderate diagnostic agreement (kappa value = 0.87). Both nested PCR and MIRA-CRISPR/Cas13a-LFD exhibited 100% sensitivity and excellent diagnostic agreement (kappa value = 1). CONCLUSIONS The MIRA-CRISPR/Cas13a-LFD method is a convenient, rapid, stable, and accurate diagnostic tool for detecting T. vaginalis. This method has the potential to enhance the diagnosis and management of vaginitis, offering a significant improvement over existing diagnostic techniques.
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Affiliation(s)
- Zhenke Yang
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Jinghui Wang
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Yiming Qi
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Yiping Shi
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Fakun Li
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Weijuan Wang
- Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Xiaowei Tian
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Xuefang Mei
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Zhenchao Zhang
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China.
| | - Shuai Wang
- Xinxiang Key Laboratory of Pathogenic Biology, Department of Pathogenic Biology, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China.
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Prevalence and Genotype of Trichomonas vaginalis among Men in Xinxiang City, Henan Province, China. J Trop Med 2023; 2023:4119956. [PMID: 36895425 PMCID: PMC9991476 DOI: 10.1155/2023/4119956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/28/2023] [Accepted: 02/09/2023] [Indexed: 03/05/2023] Open
Abstract
Trichomonas vaginalis (T. vaginalis) could cause trichomoniasis through sexual transmission, which was globally distributed. In this study, the prevalence and phylogenetic analyses of T. vaginalis among men in Xinxiang were conducted. From October 2018 to December 2019, a total of 634 male clinical samples were collected, including 254 samples of semen, 43 samples of prostate fluid, and 337 samples of urine. These samples were examined by nested PCR and a total of 32 (5.05%) T. vaginalis-positive samples were detected. Among these samples, the positive rates of T. vaginalis in semen, prostate fluid, and urine were 7.87% (20/254), 4.65% (2/43), and 2.97% (10/337), respectively. Three actin genes were successfully isolated and sequenced from the 32 positive DNA samples, and the analysis of the sequence and phylogenetic tree showed that the three actin gene sequences exhibited 99.7%-100% homology to the published actin gene sequence (EU076580) in NCBI, and the T. vaginalis strains in the three positive samples were identified as genotype E. Our results demonstrate a notable genotype of T. vaginalis in the male population and provide insight into the performance of these genetic markers in the molecular epidemiology of trichomoniasis. However, further studies are needed to research the association between the genotype and the pathogenicity of T. vaginalis.
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Bokharaei-Salim F, Hedayati N, Khanaliha K, Esghaei M, Minaeian S, Oshaghi M, Salemi B. Molecular typing of the actin gene of Trichomonas vaginalis isolates in Tehran, Iran. J Parasit Dis 2022; 46:764-770. [PMID: 36091287 PMCID: PMC9458830 DOI: 10.1007/s12639-022-01496-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 04/24/2022] [Indexed: 11/26/2022] Open
Abstract
Trichomonas vaginalis is a protozoan parasite that causes trichomoniasis with worldwide distribution. This study evaluated actin genotypes of T. vaginalis isolates using PCR-RFLP and sequence analysis in Tehran, Iran. Overall, 850 vaginal samples were collected from women admitted to hospitals affiliated with the Iran University of Medical Sciences in Tehran from 2020-to 2021. The samples were examined by wet mount and cultured. The parasites were harvested, and PCR-RFLP was performed using three endonuclease enzymes of HindII, MseI, and RsaI on all T. vaginalis isolates. Digestion patterns were then compared, and the genotype of these isolates was defined. The PCR products were sequenced. Overall, 12 (1.4%) isolates of T. vaginalis were identified from 850 vaginal samples collected. The most common genotypes were genotype E, seven (58.3%) and genotype G, three (25%), followed by genotype I, two (%16.7), using PCR-RFLP patterns and sequencing. No pattern indicative of mixed infection was found. PCR-RFLP is a proper technique to detect different T. vaginalis isolates, and noticeable polymorphism was found between isolates. Genotype E was the most common genotype in the studied group. The phylogenetic analysis indicated the T. vaginalis genotype E isolates in a distinct group compared to the genotypes G and I that evolved from a common ancestor.
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Affiliation(s)
- Farah Bokharaei-Salim
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Hedayati
- School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Khadijeh Khanaliha
- Research Center of Pediatric Infectious Diseases, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Esghaei
- Department of Virology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sara Minaeian
- Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Tehran, Iran
| | - Mojgan Oshaghi
- Department of Medical Laboratory Sciences, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Borna Salemi
- Student Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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Lorenzo-Benito S, Rivera-Rivas LA, Sánchez-Ayala L, Ortega-López J, Montes-Flores O, Talamás-Lara D, Arroyo R. Omics Analyses of Trichomonas vaginalis Actin and Tubulin and Their Participation in Intercellular Interactions and Cytokinesis. Genes (Basel) 2022; 13:genes13061067. [PMID: 35741829 PMCID: PMC9222396 DOI: 10.3390/genes13061067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/04/2022] [Accepted: 06/07/2022] [Indexed: 02/01/2023] Open
Abstract
Actin and tubulin proteins from Trichomonas vaginalis are crucial for morphogenesis and mitosis. This parasite has 10 and 11 genes coding bonafide actin and tubulin proteins, respectively. Hence, the goal of this work was to analyze these actin and tubulin genes, their expression at the mRNA and protein levels, and their parasite localization in intercellular interaction and cytokinesis. Representative bonafide actin (tvact1) and tubulin (tvtubα1) genes were cloned into and expressed in Escherichia coli. The recombinant proteins TvACT1r and TvTUBα1r were affinity purified and used as antigens to produce polyclonal antibodies. These antibodies were used in 1DE and 2DE WB and indirect immunofluorescence assays (IFA). By IFA, actin was detected as a ring on the periphery of ameboid, ovoid, and cold-induced cyst-like parasites, on pseudopods of amoeboid parasites, and in cytoplasmic extensions (filopodia) in cell–cell interactions. Tubulin was detected in the axostyle, flagellum, undulating membrane, and paradesmose during mitosis. Paradesmose was observed by IFA mainly during cytokinesis. By scanning electron microscopy, a tubulin-containing nanotubular structure similar to the tunneling nanotubes (TNTs) was also detected in the last stage of cytokinesis. In conclusion, actin and tubulin are multigene families differentially expressed that play important roles in intercellular interactions and cytokinesis.
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Affiliation(s)
- Sebastián Lorenzo-Benito
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (S.L.-B.); (L.A.R.-R.); (L.S.-A.); (D.T.-L.)
| | - Luis Alberto Rivera-Rivas
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (S.L.-B.); (L.A.R.-R.); (L.S.-A.); (D.T.-L.)
| | - Lizbeth Sánchez-Ayala
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (S.L.-B.); (L.A.R.-R.); (L.S.-A.); (D.T.-L.)
| | - Jaime Ortega-López
- Departamento de Biotecnología y Bioingeniería, CINVESTAV-IPN. Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (J.O.-L.); (O.M.-F.)
| | - Octavio Montes-Flores
- Departamento de Biotecnología y Bioingeniería, CINVESTAV-IPN. Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (J.O.-L.); (O.M.-F.)
| | - Daniel Talamás-Lara
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (S.L.-B.); (L.A.R.-R.); (L.S.-A.); (D.T.-L.)
| | - Rossana Arroyo
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. IPN #2508, Col. San Pedro Zacatenco, Alcaldía Gustavo A. Madero, Mexico City CP 07360, Mexico; (S.L.-B.); (L.A.R.-R.); (L.S.-A.); (D.T.-L.)
- Correspondence: ; Tel.: +52-55-5747-3342
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Mabaso N, Abbai N. Distribution of genotypes in relation to metronidazole susceptibility patterns in Trichomonas vaginalis isolated from South African pregnant women. Parasitol Res 2021; 120:2233-2241. [PMID: 34002261 PMCID: PMC8128682 DOI: 10.1007/s00436-021-07177-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 04/29/2021] [Indexed: 01/25/2023]
Abstract
Reports on metronidazole resistance of Trichomonas vaginalis strains have been on the increase. This study investigated the in vitro metronidazole resistance patterns in T. vaginalis isolates obtained from South African pregnant women and the genotypes of these isolates. This study included 362 pregnant women recruited from a hospital in Durban, South Africa. The women provided self-collected vaginal swabs for the detection of T. vaginalis by culture in Diamonds media. Cultured isolates were then subjected to anaerobic susceptibility assays to metronidazole. For the genotyping assays, the actin gene was digested by HindII, MseI, and RsaI. The banding patterns obtained after digestion was used to determine the genotypes. A total of 21/362 (5.8%) pregnant women tested positive for T. vaginalis infection. Of the 21 T. vaginalis isolates tested for metronidazole susceptibility, 9.5% (2/21) had a minimum inhibitory concentration (MIC) of 4 μg/ml (resistant), 38.1% (8/21) had a MIC of 2 μg/ml (intermediate), and 52.4% (11/21) had a MIC ≤ 1 μg/ml (susceptible). The dominant genotype that was identified across the isolates was genotype G. There was no correlation between genotype harboured and metronidazole susceptibility patterns. In this study, resistance to metronidazole was observed in clinical isolates of T. vaginalis. This study did not find a correlation between genotype harboured and metronidazole susceptibility patterns. Despite the lack of association, our study provides data on an area of research that is currently lacking in our setting.
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Affiliation(s)
- Nonkululeko Mabaso
- School of Clinical Medicine Laboratory, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.
| | - Nathlee Abbai
- School of Clinical Medicine Laboratory, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
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Multiattribute Analysis of Trichomonas vaginalis Diagnostics and Its Correlation with Clinical Complaints and Contraceptive Methods in a Symptomatic Egyptian Cohort. Infect Dis Obstet Gynecol 2021; 2021:5525095. [PMID: 34012232 PMCID: PMC8105115 DOI: 10.1155/2021/5525095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/16/2021] [Accepted: 04/21/2021] [Indexed: 11/18/2022] Open
Abstract
Background Trichomonas vaginalis (T. vaginalis) infection has been long considered among the sexually transmitted diseases that possesses a clear effect on women's health especially in the childbearing period. Methods A 234 females of age range 18-45 years old attending the Gynecology and Obstetrics Outpatient Clinic of Kasr El Aini Hospitals were enrolled in a cross-sectional study. The taken vaginal swabs were subjected to wet mount microscopy, Giemsa stain, modified Diamond's culture, and nested polymerase chain reaction (nPCR) amplification. Multiattribute and analytical hierarchy processes were conducted to detect laboratory utility. Univariate and multivariate analyses were done to detect the multiple risk factors that may be associated with Trichomonas infection. Results Based on nPCR, the prevalence of trichomoniasis was 26.9%. Wet mount, Giemsa stain, and culture showed 100% specificity but of low sensitivity (28.57%, 28.57%, and 57.14%, respectively). On the multivariate analysis, nPCR showed the highest rank for diagnostic performance and culture had the lowest rank. For univariate analysis, there was a significant correlation between T. vaginalis infection and vaginal discharge, burning sensation, dyspareunia, and the use of intrauterine device (IUD) (P value < 0.05). Conclusion The routine screening of trichomoniasis using nPCR was reliable, sensitive, and specific. Also, it could financially be considered a more suitable option in batch screening. Significant higher rates of infection were reported among IUD users compared to condom or hormonal-based methods.
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Identification of Trichomonas Vaginalis Genotypes Using by Actin Gene and Molecular Based Methods in Southwest of Iran. Rep Biochem Mol Biol 2021; 10:135-143. [PMID: 34277877 DOI: 10.52547/rbmb.10.1.135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 01/19/2020] [Indexed: 11/18/2022]
Abstract
Background Trichomonas vaginalis (T. vaginalis) is a sexually transmitted protozoan parasite and the causative agent of trichomoniasis. The genetic characterization of T. vaginalis isolates shows notable genetic variation in this parasite. In the present study, we aimed to identify the T. vaginalis genotypes based on analyzing of actin gene in women specimens referred to health centers of Ilam city, southwest Iran. Methods A total of 1765 female samples were collected from gynecology clinics in the city of Ilam. DNA was extracted from positive samples and nested polymerase chain reaction (Nested PCR) was used to amplify the actin gene. Then, partial sequencing and genotyping of the actin gene was performed. A phylogenetic tree was drawn using the detected genotypes of T. vaginalis and reference sequences. Results Twenty-one of the 1765 urine and vaginal samples were positive for T. vaginalis. All infected individuals were married and their age in years was between 25 to 34. Further, the majority of infected women had cervical lesions, patchy erythema, and white color discharge. According to sequencing analysis, the isolates were identified as genotype G (n= 8) and genotype E (n= 2). Conclusion From the collected samples, we were able to distinguish at least two genotypes (G and E) of T. vaginalis. However, lesser is known about these genotypes in the city of Ilam. Further studies with a higher number of isolates should be performed in order to understand the implications of these results in this region.
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Actin Gene-Based Molecular Typing of Trichomonas vaginalis Clinical Isolates from the North of Iran. Acta Parasitol 2020; 65:859-864. [PMID: 32500506 DOI: 10.2478/s11686-020-00226-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 05/06/2020] [Indexed: 11/20/2022]
Abstract
AIM The aim of the current study is to evaluate the prevalence of trichomoniasis in men and women in the north of Iran and to find genotypes in the positive clinical specimens based on T. vaginalis actin gene. MATERIALS AND METHODS Women's genital (n = 500) and men's urine (n = 1500) samples were collected from the participants referred to clinics in Mazandaran Province, northern Iran, during 2006-2018. In addition, 1500 Pap smear specimens, archived in the Bu Ali Hospital, Sari City, Mazandaran Province, northern Iran, were examined. The specimens were examined based on parasitological methods, nested polymerase chain reaction (PCR), PCR-restriction fragment length polymorphism, and phylogenetic analysis. RESULTS Overall, 17 (0.48%) of 3500 specimens were positive by PCR. Total prevalence was 0.55% (n = 2000) for women, of which 500 (1.4%; n = 7) specimens were collected freshly, and 1500 (0.26%; n = 4) were Pap smears. Moreover, six (0.4%) out of 1500 men urine specimens were positive. Overall, genotypes G, E, and I were detected with the prevalence of seven (0.2%), seven (0.2%), and three (0.08%), respectively. There was no significant statistical difference among the prevalence of the detected genotypes (P > 0.05). CONCLUSION As a whole, the prevalence of trichomoniasis was low in the studied area in the north of Iran and, most importantly, the genotypes of E, G, and I were distributed among men and women in the province.
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Genotypic Variation in Trichomonas vaginalis Detected in South African Pregnant Women. Infect Dis Obstet Gynecol 2020; 2020:1687427. [PMID: 32831547 PMCID: PMC7426786 DOI: 10.1155/2020/1687427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/25/2020] [Accepted: 07/14/2020] [Indexed: 11/17/2022] Open
Abstract
Background Trichomonas vaginalis is the causative agent of trichomoniasis. The genetic characterisation of T. vaginalis isolates reveals significant genetic diversity in this organism. Data on the prevalence of different genotypes of T. vaginalis in South African populations is lacking. This study investigated the diversity of T. vaginalis in a pregnant population in South Africa. Methods In this study, 362 pregnant women from the King Edward VIII Hospital in Durban, South Africa, provided vaginal swabs to be tested for the presence of T. vaginalis. T. vaginalis was detected using the TaqMan assay using commercially available primers and probes specific for this protozoan (Pr04646256_s1). The actin gene from T. vaginalis was amplified with gene-specific primers. The actin amplicons were digested with HindII, MseI, and RsaI, and the banding patterns were compared across the three digests for assignment of genotypes. Phylogenetic analysis was conducted using MEGA. Results The prevalence of T. vaginalis in the study population was 12.9% (47/362). Genotype G was the most frequent genotype in our study population. Genotypes H and I were detected in one sample each. According to the multiple sequence alignments and phylogenetic analysis, a level of diversity was observed across and within genotypes. Four different single-nucleotide changes in the actin gene were detected. Sample TV358 (H genotype) contained a single amino acid substitution from glutamine to lysine. Sample TV184 (G genotype) contained a single amino acid substitution from glutamic acid to arginine. Sample TV357 (G genotype) contained two amino acid substitutions, arginine to leucine and glycine to aspartic acid. Conclusion Three different genotypes were observed in the pregnant population. Diversity was observed across and within genotypes. The observed diversity can be challenging for future vaccine design and development of antigen-based rapid diagnostic tests for trichomoniasis.
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Genetic Diversity of Trichomonas Vaginalis Clinical Isolates According to Restriction Fragment Length Polymorphism Analysis of the 60-kDa Proteinase Gene. Acta Parasitol 2019; 64:300-307. [PMID: 31165993 DOI: 10.2478/s11686-019-00065-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 05/02/2019] [Indexed: 01/31/2023]
Abstract
INTRODUCCTION Trichomonas vaginalis is a highly prevalent parasitic that causes the sexually transmitted disease trichomoniasis with some serious health complications. More understanding about genetic features of the parasite can be helpful in the study of the pathogenesis, epidemiology of the infection and drug susceptibility. For this end, we conducted analysis of a fragment (23 kDa) of the p60 of T. vaginalis gene. MATERIAL AND METHODS The restriction fragment length polymorphism (RFLP) methods was used. RESULT AND DISCUSSION RFLP analysis showed the difference between T. vaginalis isolates from symptomatic and asymptomatic patients, suggesting a relation between the genetic identity of the isolates and their clinical manifestations.
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Masha SC, Cools P, Descheemaeker P, Reynders M, Sanders EJ, Vaneechoutte M. Urogenital pathogens, associated with Trichomonas vaginalis, among pregnant women in Kilifi, Kenya: a nested case-control study. BMC Infect Dis 2018; 18:549. [PMID: 30400890 PMCID: PMC6219184 DOI: 10.1186/s12879-018-3455-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 10/23/2018] [Indexed: 11/23/2022] Open
Abstract
Background Screening of curable sexually transmitted infections is frequently oriented towards the diagnosis of chlamydia, gonorrhea, syphilis and trichomoniasis, whereas other pathogens, sometimes associated with similar urogenital syndromes, remain undiagnosed and/or untreated. Some of these pathogens are associated with adverse pregnancy outcomes. Methods In a nested case-control study, vaginal swabs from 79 pregnant women, i.e., 28 T. vaginalis-positive (cases) and 51 T. vaginalis-negative (controls), were screened by quantitative PCR for Adenovirus 1 and 2, Cytomegalovirus, Herpes Simplex Virus 1 and 2, Chlamydia trachomatis, Escherichia coli, Haemophilus ducreyi, Mycoplasma genitalium, M. hominis, candidatus M. girerdii, Neisseria gonorrhoeae, Streptococcus agalactiae, Treponema pallidum, Ureaplasma parvum, U. urealyticum, and Candida albicans. Additionally, we determined whether women with pathogens highly associated with T. vaginalis had distinct clinical signs and symptoms compared to women with T. vaginalis mono-infection. Results M. hominis was independently associated with T. vaginalis (adjusted odds ratio = 6.8, 95% CI: 2.3–19.8). Moreover, M. genitalium and Ca M. girerdii were exclusively detected in women with T. vaginalis (P = 0.002 and P = 0.001), respectively. Four of the six women co-infected with T. vaginalis and Ca M. girerdii complained of vaginal itching, compared to only 4 out of the 22 women infected with T. vaginalis without Ca M. girerdii (P = 0.020). Conclusion We confirm M. hominis as a correlate of T. vaginalis in our population, and the exclusive association of both M. genitalium and Ca. M. girerdii with T. vaginalis. Screening and treatment of these pathogens should be considered. Electronic supplementary material The online version of this article (10.1186/s12879-018-3455-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Simon C Masha
- Kenya Medical Research Institute, Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute, P.O. Box 230, Kilifi, Kenya. .,Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185, Ghent, Belgium. .,Faculty of Pure and Applied Sciences, Department of Biological Sciences, Pwani University, Kilifi, Kenya.
| | - Piet Cools
- Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185, Ghent, Belgium
| | - Patrick Descheemaeker
- Department of Laboratory Medicine, Medical Microbiology, AZ St-Jan Brugge-Oostende, Bruges, Belgium
| | - Marijke Reynders
- Department of Laboratory Medicine, Medical Microbiology, AZ St-Jan Brugge-Oostende, Bruges, Belgium
| | - Eduard J Sanders
- Kenya Medical Research Institute, Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute, P.O. Box 230, Kilifi, Kenya
| | - Mario Vaneechoutte
- Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185, Ghent, Belgium
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Zhang Z, Kang L, Wang W, Zhao X, Li Y, Xie Q, Wang S, He T, Li H, Xiao T, Chen Y, Zuo S, Kong L, Li P, Li X. Prevalence and genetic diversity of Trichomonas vaginalis clinical isolates in a targeted population in Xinxiang City, Henan Province, China. Parasit Vectors 2018; 11:124. [PMID: 29499747 PMCID: PMC5834841 DOI: 10.1186/s13071-018-2753-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 02/26/2018] [Indexed: 11/15/2022] Open
Abstract
Background Trichomonas vaginalis (TV) is a protozoan parasite that causes trichomoniasis, a sexually transmitted disease, worldwide. In this study, we investigated the prevalence and genetic characterization of T. vaginalis and contrasted the most prevalent strains of T. vaginalis isolated from Xinxiang City, Henan Province, China. Results In Xinxiang from September 2015 to September 2017, a total of 267 (1.64%, 95% confidence interval, CI: 1.45–1.85) clinical T. vaginalis-positive samples from vaginal secretions were observed by wet mount microscopy from 16,294 women with some clinical symptoms of trichomoniasis. We found that trichomoniasis frequently occurred in the 21- to 40-year-old age group and in winter. After the 267 clinical T. vaginalis positive samples were cultured, 68 isolates of T. vaginalis were harvested and identified as genotype E (58.82%), H (17.65%), mixed 1 (17.65%) and mixed 2 (5.88%) using a sensitive and reliable polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) typing method on the actin gene. The phylogenetic diversity analysis showed that the genotype E samples fell within a separate clade compared to the other T. vaginalis isolates, while the samples of the genotype H separated into two clades. Conclusions Our results demonstrate a notable gene polymorphism of clinical isolates from the targeted population and provide insight into the performance of these genetic markers in the molecular epidemiology of trichomoniasis. However, further studies are needed to clarify the association between a certain genotype and the pathogenicity of T. vaginalis.
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Affiliation(s)
- Zhenchao Zhang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Lixia Kang
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Weijuan Wang
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Xin Zhao
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Yuhua Li
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Qing Xie
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Shuai Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China.
| | - Tong He
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Han Li
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Tingwei Xiao
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Yunchao Chen
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Suqiong Zuo
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Lingmin Kong
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Pengju Li
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Xiangrui Li
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China. .,College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, People's Republic of China.
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Masha SC, Cools P, Crucitti T, Sanders EJ, Vaneechoutte M. Molecular typing of Trichomonas vaginalis isolates by actin gene sequence analysis and carriage of T. vaginalis viruses. Parasit Vectors 2017; 10:537. [PMID: 29084570 PMCID: PMC5663105 DOI: 10.1186/s13071-017-2496-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 10/23/2017] [Indexed: 11/15/2022] Open
Abstract
Background The protozoan parasite Trichomonas vaginalis is the most common non-viral, sexually transmitted pathogen. Although T. vaginalis is highly prevalent among women in Kenya, there is lack of data regarding genetic diversity of isolates currently in circulation in Kenya. Methods Typing was performed on 22 clinical isolates of T. vaginalis collected from women attending the antenatal care clinic at Kilifi County Hospital, Kenya, in 2015. Genotyping followed a previously proposed restriction fragment length polymorphism (RFLP) scheme, which involved in silico cleavage of the amplified actin gene by HindII, MseI and RsaI restriction enzymes. Phylogenetic analysis of all the sequences was performed to confirm the results obtained by RFLP-analysis and to assess the diversity within the RFLP genotypes. Additionally, we determined carriage of the four different types of Trichomonas vaginalis viruses (TVVs) by polymerase chain reaction. Results In silico RFLP-analysis revealed five actin genotypes; 50.0% of the isolates were of actin genotype E, 27.3% of actin genotype N, 13.6% of actin genotype G and 4.5% of actin genotypes I and P. Phylogenetic analysis was in agreement with the RFLP-analysis, with the different actin genotypes clustering together. Prevalence of TVVs was 43.5% (95% confidence interval, CI: 23.2–65.5). TVV1 was the most prevalent, present in 39.1% of the strains and 90% of the T. vaginalis isolates which harbored TVVs had more than one type of TVV. None of the isolates of actin genotype E harbored any TVV. Conclusion The presence of five actin genotypes in our study suggests notable diversity among T. vaginalis isolates occurring among pregnant women in Kilifi, Kenya. Isolates of the most prevalent actin genotype E lacked TVVs. We found no association between T. vaginalis genotype, carriage of TVVs and symptoms. Further studies with higher number of strains should be conducted in order to corroborate these results. Electronic supplementary material The online version of this article (10.1186/s13071-017-2496-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Simon C Masha
- Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute (KEMRI), P.O. Box 230-80108, Kilifi, Kenya. .,Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185 9000, Ghent, Belgium. .,Department of Biological Sciences, Faculty of Pure and Applied Sciences, Pwani University, P.O. BOX 195-80108, Kilifi, Kenya.
| | - Piet Cools
- Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185 9000, Ghent, Belgium
| | - Tania Crucitti
- HIV/STI Reference Laboratory, Department of Clinical Sciences, Institute of Tropical Medicine, Nationalestraat 155, 2000, Antwerpen, Belgium
| | - Eduard J Sanders
- Centre for Geographic Medicine Research - Coast, Kenya Medical Research Institute (KEMRI), P.O. Box 230-80108, Kilifi, Kenya
| | - Mario Vaneechoutte
- Laboratory Bacteriology Research, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan, 185 9000, Ghent, Belgium
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Goo YK, Shin WS, Yang HW, Joo SY, Song SM, Ryu JS, Kong HH, Lee WK, Chung DI, Hong Y. Loop-Mediated Isothermal Amplification Targeting Actin DNA of Trichomonas vaginalis. THE KOREAN JOURNAL OF PARASITOLOGY 2016; 54:329-34. [PMID: 27417089 PMCID: PMC4977792 DOI: 10.3347/kjp.2016.54.3.329] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 04/10/2016] [Accepted: 04/16/2016] [Indexed: 11/24/2022]
Abstract
Trichomoniasis caused by Trichomonas vaginalis is a common sexually transmitted disease. Its association with several health problems, including preterm birth, pelvic inflammatory disease, cervical cancer, and transmission of human immunodeficiency virus, emphasizes the importance of improved access to early and accurate detection of T. vaginalis. In this study, a rapid and efficient loop-mediated isothermal amplification-based method for the detection of T. vaginalis was developed and validated, using vaginal swab specimens from subjects suspected to have trichomoniasis. The LAMP assay targeting the actin gene was highly sensitive with detection limits of 1 trichomonad and 1 pg of T. vaginalis DNA per reaction, and specifically amplified the target gene only from T. vaginalis. Validation of this assay showed that it had the highest sensitivity and better agreement with PCR (used as the gold standard) compared to microscopy and multiplex PCR. This study showed that the LAMP assay, targeting the actin gene, could be used to diagnose early infections of T. vaginalis. Thus, we have provided an alternative molecular diagnostic tool and a point-of-care test that may help to prevent trichomoniasis transmission and associated complications.
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Affiliation(s)
- Youn-Kyoung Goo
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Won-Sik Shin
- Department of Obstetrics and Gynecology, Shinsegae Women's Hospital, Daegu 41535, Korea
| | - Hye-Won Yang
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - So-Young Joo
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Su-Min Song
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Jae-Sook Ryu
- Department of Environmental Biology & Medical Parasitology, Hanyang University College of Medicine, Seoul 04763, Korea
| | - Hyun-Hee Kong
- Department of Parasitology, Dong-A University College of Medicine, Busan 49201, Korea
| | - Won-Ki Lee
- Center of Biostatistics, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Dong-Il Chung
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Yeonchul Hong
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
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Momeni Z, Sadraei J, Kazemi B, Dalimi A. Molecular typing of the actin gene of Trichomonas vaginalis isolates by PCR-RFLP in Iran. Exp Parasitol 2015; 159:259-63. [PMID: 26542260 DOI: 10.1016/j.exppara.2015.10.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 09/06/2015] [Accepted: 10/29/2015] [Indexed: 10/22/2022]
Abstract
Trichomonas vaginalis is a human urogenital pathogen that causes trichomoniasis, the most common nonviral, parasitic sexually transmitted infection in the world. At present, little is known regarding the degree of strain variability of T. vaginalis. A classification method for T. vaginalis strains would be a useful tool in the study of the epidemiology, drug resistance, pathogenesis and transmission of T. vaginalis. Eight different types of actin genes have been identified by PCR-RFLP in T. vaginalis; the purpose of this study is to determine the genotypes of this parasite in Karaj city, Iran. Forty-five clinical T. vaginalis isolates from vaginal secretions and urine sediment were collected from Karaj city from 2012 through 2014. DNA was extracted and the actin gene was amplified by nested-PCR; all samples were positive. To determine the genetic differences, sequencing on seven samples was conducted. Then, all PCR products were digested with HindII, MseI, and RsaI restriction enzymes. Of 45 isolates, 23 samples (51.1%) were of actin genotype G, 11 samples (24.4%) of genotype E, six samples (13.3%) of genotype H, three samples (6.6%) of genotype I, and two samples (4.4%) were mixed genotypes of G and E. Genetic diversity of T. vaginalis isolates is notable. The actin genotype G may be the dominant genotype in Karaj city, Iran.
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Affiliation(s)
- Zohreh Momeni
- Parasitology & Entomology Dept., Medical Sciences Faculty, Tarbiat Modares University, Tehran, Iran
| | - Javid Sadraei
- Parasitology & Entomology Dept., Medical Sciences Faculty, Tarbiat Modares University, Tehran, Iran.
| | - Bahram Kazemi
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdolhossein Dalimi
- Parasitology & Entomology Dept., Medical Sciences Faculty, Tarbiat Modares University, Tehran, Iran
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17
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Hawksworth J, Levy M, Smale C, Cheung D, Whittle A, Longhurst D, Muir P, Gibson W. Population structure and genetic diversity of the parasite Trichomonas vaginalis in Bristol, UK. INFECTION GENETICS AND EVOLUTION 2015; 34:36-43. [DOI: 10.1016/j.meegid.2015.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/03/2015] [Accepted: 06/04/2015] [Indexed: 10/23/2022]
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Trichomonas vaginalis is highly prevalent in adolescent girls, pregnant women, and commercial sex workers in Ndola, Zambia. Sex Transm Dis 2013; 37:223-7. [PMID: 19940808 DOI: 10.1097/olq.0b013e3181c21f93] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The aim of the study was to assess the prevalence of Trichomonas sp. infection among adolescent girls, pregnant women, and commercial sex workers in Ndola, Zambia. METHODS A cross-sectional study was conducted among 460 girls attending school, 307 pregnant women, and 197 commercial sex workers. Self-collected specimens from the vagina, rectum, and mouth were tested by polymerase chain amplification assays for the presence of Trichomonas vaginalis, Pentatrichomonas hominis, and Trichomonas tenax. Genotyping was performed on specimens that tested positive for T. vaginalis. RESULTS The prevalence of vaginal infection with T. vaginalis was 24.6% among the adolescents, 32.2% among the pregnant women, and 33.2% among the commercial sex workers. Trichomonads other than T. vaginalis were rarely found in the vagina, rectum, and mouth. The presence of T. vaginalis in the rectum was associated with T. vaginalis in the vagina. T. tenax was also detected in the vagina. A total of 9 actin genotypes of T. vaginalis were identified. The distribution of the actin genotypes of T. vaginalis was similar in the 3 study groups. CONCLUSION We detected high prevalence rates of trichomoniasis among women in Ndola, Zambia. Prevalence among adolescent girls was lower than among pregnant women and commercial sex workers but was still high. We were not able to detect differences in T. vaginalis actin genotypes among the 3 study groups.
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Abstract
Recent advances in genetic characterisation of Trichomonas vaginalis isolates show that the extensive clinical variability in trichomoniasis and its disease sequelae are matched by significant genetic diversity in the organism itself, suggesting a connection between the genetic identity of isolates and their clinical manifestations. Indeed, a high degree of genetic heterogeneity in T vaginalis isolates has been observed using multiple genotyping techniques. A unique two-type population structure that is both local and global in distribution has been identified, and there is evidence of recombination within each group, although sexual recombination between the groups appears to be constrained. There is conflicting evidence in these studies for correlations between T vaginalis genetic identity and clinical presentation, metronidazole susceptibility, and the presence of T vaginalis virus, underscoring the need for adoption of a common standard for genotyping the parasite. Moving forward, microsatellite genotyping and multilocus sequence typing are the most robust techniques for future investigations of T vaginalis genotype-phenotype associations.
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Affiliation(s)
- John C Meade
- Department of Microbiology, University of Mississippi Medical Center, Jackson, Mississippi, USA
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Genetic Characterization of Trichomonas vaginalis Isolates by Use of Multilocus Sequence Typing. J Clin Microbiol 2012; 50:3293-300. [DOI: 10.1128/jcm.00643-12] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Prokopi M, Chatzitheodorou T, Ackers JP, Clark CG. A preliminary investigation of microsatellite-based genotyping in Trichomonas vaginalis. Trans R Soc Trop Med Hyg 2011; 105:479-81. [PMID: 21700304 DOI: 10.1016/j.trstmh.2011.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 05/10/2011] [Accepted: 05/10/2011] [Indexed: 11/26/2022] Open
Abstract
The genetic epidemiology of Trichomonas vaginalis is poorly understood at present. The recent release of the organism's genome sequence opens the way to investigation of polymorphic markers allowing strain identification. We here report a preliminary analysis of microsatellite loci in T. vaginalis and show that this approach holds promise for future studies of infection transmission and organism diversity.
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Affiliation(s)
- Marianna Prokopi
- Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK
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Conrad M, Zubacova Z, Dunn LA, Upcroft J, Sullivan SA, Tachezy J, Carlton JM. Microsatellite polymorphism in the sexually transmitted human pathogen Trichomonas vaginalis indicates a genetically diverse parasite. Mol Biochem Parasitol 2010; 175:30-8. [PMID: 20813140 DOI: 10.1016/j.molbiopara.2010.08.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 08/19/2010] [Accepted: 08/23/2010] [Indexed: 10/19/2022]
Abstract
Given the growing appreciation of serious health sequelae from widespread Trichomonas vaginalis infection, new tools are needed to study the parasite's genetic diversity. To this end we have identified and characterized a panel of 21 microsatellites and six single-copy genes from the T. vaginalis genome, using seven laboratory strains of diverse origin. We have (1) adapted our microsatellite typing method to incorporate affordable fluorescent labeling, (2) determined that the microsatellite loci remain stable in parasites continuously cultured for up to 17 months, and (3) evaluated microsatellite marker coverage of the six chromosomes that comprise the T. vaginalis genome, using fluorescent in situ hybridization (FISH). We have used the markers to show that T. vaginalis is a genetically diverse parasite in a population of commonly used laboratory strains. In addition, we have used phylogenetic methods to infer evolutionary relationships from our markers in order to validate their utility in future population analyses. Our panel is the first series of robust polymorphic genetic markers for T. vaginalis that can be used to classify and monitor lab strains, as well as provide a means to measure the genetic diversity and population structure of extant and future T. vaginalis isolates.
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Affiliation(s)
- Melissa Conrad
- Department of Medical Parasitology, New York University Langone Medical Center, New York, NY 10010, USA
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Cui J, Das S, Smith TF, Samuelson J. Trichomonas transmembrane cyclases result from massive gene duplication and concomitant development of pseudogenes. PLoS Negl Trop Dis 2010; 4:e782. [PMID: 20689771 PMCID: PMC2914791 DOI: 10.1371/journal.pntd.0000782] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 07/02/2010] [Indexed: 01/04/2023] Open
Abstract
Background Trichomonas vaginalis has an unusually large genome (∼160 Mb) encoding ∼60,000 proteins. With the goal of beginning to understand why some Trichomonas genes are present in so many copies, we characterized here a family of ∼123 Trichomonas genes that encode transmembrane adenylyl cyclases (TMACs). Methodology/Principal Findings The large family of TMACs genes is the result of recent duplications of a small set of ancestral genes that appear to be unique to trichomonads. Duplicated TMAC genes are not closely associated with repetitive elements, and duplications of flanking sequences are rare. However, there is evidence for TMAC gene replacements by homologous recombination. A high percentage of TMAC genes (∼46%) are pseudogenes, as they contain stop codons and/or frame shifts, or the genes are truncated. Numerous stop codons present in the genome project G3 strain are not present in orthologous genes of two other Trichomonas strains (S1 and B7RC2). Each TMAC is composed of a series of N-terminal transmembrane helices and a single C-terminal cyclase domain that has adenylyl cyclase activity. Multiple TMAC genes are transcribed by Trichomonas cloned by limiting dilution. Conclusions/Significance We conclude that one reason for the unusually large genome of Trichomonas is the presence of unstable families of genes such as those encoding TMACs that are undergoing massive gene duplication and concomitant development of pseudogenes. Trichomonas vaginalis is the only medically important protist (single-cell eukaryote) that is sexually transmitted. The ∼160-Mb Trichomonas genome contains more predicted protein-encoding genes (∼60,000) than the human genome. To begin to understand why there are so many copies of some genes, we chose here to study a large family of genes encoding unique transmembrane cyclases. Our most important results include the following. More than 100 transmembrane cyclase genes do not result from chromosomal duplications, because for the most part only the coding regions of the genes, rather than flanking sequences, are duplicated. Almost half of the transmembrane cyclase genes are pseudogenes, and these pseudogenes are polymorphic among laboratory strains of Trichomonas. Messenger RNAs for numerous transmembrane cyclases are expressed simultaneously, and representative cyclase domains have adenylyl cyclase activity. In summary, the large family of Trichomonas genes encoding transmembrane adenylyl cyclases results from massive gene duplication and concomitant development of pseudogenes.
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Affiliation(s)
- Jike Cui
- Department of Molecular and Cell Biology, Boston University Goldman School of Dental Medicine, Boston, Massachusetts, United States of America
- Graduate Program in Bioinformatics, Boston University, Boston, Massachusetts, United States of America
| | - Suchismita Das
- Department of Molecular and Cell Biology, Boston University Goldman School of Dental Medicine, Boston, Massachusetts, United States of America
| | - Temple F. Smith
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States of America
| | - John Samuelson
- Department of Molecular and Cell Biology, Boston University Goldman School of Dental Medicine, Boston, Massachusetts, United States of America
- * E-mail:
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Current world literature. Curr Opin Obstet Gynecol 2009; 21:450-5. [PMID: 19724169 DOI: 10.1097/gco.0b013e3283317d6c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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