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Trichomonas vaginalis

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https://www.readbyqxmd.com/read/28918075/direct-detection-of-trichomonas-vaginalis-virus-in-trichomonas-vaginalis-positive-clinical-samples-from-the-netherlands
#1
Ivo Jehee, Charlotte van der Veer, Michelle Himschoot, Mirjam Hermans, Sylvia Bruisten
Trichomonas vaginalis is the most common sexually transmitted parasitical infection worldwide. T. vaginalis can carry a virus: Trichomonas vaginalis virus (TVV). To date, four TVV species have been described. Few studies have investigated TVV prevalence and its clinical importance. We have developed a nested reverse-transcriptase PCR, with novel, type specific primers to directly detect TVV RNA in T. vaginalis positive clinical samples. A total of 119T. vaginalis positive clinical samples were collected in Amsterdam and "s-Hertogenbosch, the Netherlands, from 2012 to 2016...
September 13, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28910741/drug-susceptibility-testing-in-microaerophilic-parasites-cysteine-strongly-affects-the-effectivities-of-metronidazole-and-auranofin-a-novel-and-promising-antimicrobial
#2
David Leitsch
The microaerophilic parasites Entamoeba histolytica, Trichomonas vaginalis, and Giardia lamblia annually cause hundreds of millions of human infections which are treated with antiparasitic drugs. Metronidazole is the most often prescribed drug but also other drugs are in use, and novel drugs with improved characteristics are constantly being developed. One of these novel drugs is auranofin, originally an antirheumatic which has been relabelled for the treatment of parasitic infections. Drug effectivity is arguably the most important criterion for its applicability and is commonly assessed in susceptibility assays using in vitro cultures of a given pathogen...
September 5, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28903731/phytochemical-rich-foods-inhibit-the-growth-of-pathogenic-trichomonads
#3
Sabrina M Noritake, Jenny Liu, Sierra Kanetake, Carol E Levin, Christina Tam, Luisa W Cheng, Kirkwood M Land, Mendel Friedman
BACKGROUND: Plants produce secondary metabolites that often possess widespread bioactivity, and are then known as phytochemicals. We previously determined that several phytochemical-rich food-derived preparations were active against pathogenic foodborne bacteria. Trichomonads produce disease (trichomoniasis) in humans and in certain animals. Trichomonads are increasingly becoming resistant to conventional modes of treatment. It is of interest to test bioactive, natural compounds for efficacy against these pathogens...
September 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28903180/diamine-derivative-anti-trichomonas-vaginalis-and-anti-tritrichomonas-foetus-activities-by-effect-on-polyamine-metabolism
#4
Graziela Vargas Rigo, Márcia Rodrigues Trein, Danielle da Silva Trentin, Alexandre José Macedo, Bruno Assis de Oliveira, Angelina Maria de Almeida, Raquel Brandt Giordani, Mauro Vieira de Almeida, Tiana Tasca
Human and bovine trichomoniasis are sexually transmitted diseases (STD) caused by Trichomonas vaginalis and Tritrichomonas foetus, respectively. Human trichomoniasis is the most common non-viral STD in the world and bovine trichomoniasis causes significant economic losses to breeders. Considering the significant impact of the infections caused by these protozoa and the treatment failures, the search for new therapeutic alternatives becomes crucial. In this study the effect of diamines and amino alcohols in the in vitro viability of trichomonads was evaluated...
September 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28887063/the-50kda-metalloproteinase-tvmp50-is-a-zinc-mediated-trichomonas-vaginalis-virulence-factor
#5
Jonathan Puente-Rivera, José Luis Villalpando, Alma Villalobos-Osnaya, Laura Isabel Vázquez-Carrillo, Gloria León-Ávila, María Dolores Ponce-Regalado, César López-Camarillo, Jose Miguel Elizalde-Contreras, Eliel Ruiz-May, Rossana Arroyo, María Elizbeth Alvarez-Sánchez
Trichomonas vaginalis is a protozoan parasite that can adapt to the trichomonicidal Zn(2+) concentrations of the male urogenital tract microenvironment. This adaptation is mediated by molecular mechanisms, including proteinase expression, that are regulated by cations such as Zn(2+). Herein, we characterized the previously identified 50kDa metalloproteinase aminopeptidase P (M24 family) member TvMP50 as a new Zn(2+)-mediated parasite virulence factor. Quantitative RT-PCR and indirect immunofluorescence assays corroborated the positive regulation of both mp50 gene expression and native TvMP50 protein overexpression in the cytoplasm and secretion products of parasites grown in the presence of Zn(2+)...
September 5, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28879644/adenosine-reduces-reactive-oxygen-species-and-interleukin-8-production-by-trichomonas-vaginalis-stimulated-neutrophils
#6
Amanda Piccoli Frasson, Camila Braz Menezes, Gustavo Krumel Goelzer, Simone Cristina Baggio Gnoatto, Solange Cristina Garcia, Tiana Tasca
Trichomonas vaginalis is a flagellated protozoan that affects the human urogenital tract causing 276.4 million new infections a year. The parasite elicits a vaginal mucosal infiltration of immune cells, especially neutrophils which are considered to be primarily responsible for cytological change observed at the infection site as well as the major contributor in the inflammatory response against the parasite. Extracellular nucleotides and their nucleosides are signaling compounds involved in several biological processes, including inflammation and immune responses...
September 6, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28877568/trichomonas-vaginalis-%C3%AE-actinin-2-modulates-host-immune-responses-by-inducing-tolerogenic-dendritic-cells-via-il-10-production-from-regulatory-t-cells
#7
Hye-Yeon Lee, Juri Kim, Jae-Sook Ryu, Soon-Jung Park
Trichomonas vaginalis is a pathogen that triggers severe immune responses in hosts. T. vaginalis α-actinin 2, Tvα-actinin 2, has been used to diagnose trichomoniasis. This study was undertaken to examine the role of Tvα-actinin 2 as an antigenic molecule to induce immune responses from humans. Western blot analysis using anti-Tvα-actinin 2 antibodies indicated its presence in the secreted proteins of T. vaginalis. ELISA was employed to measure cytokine production by vaginal epithelial cells, prostate cells, mouse dendritic cells (DCs), or T cells stimulated with T...
August 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28876319/trichomonas-vaginalis-prevalence-and-correlates-in-women-and-men-attending-sti-clinics-in-western-canada
#8
Jennifer Gratrix, Sabrina Plitt, LeeAnn Turnbull, Petra Smyczek, Judith Brandley, Ron Scarrott, Prenilla Naidu, Lindsay Bertholet, Max Chernesky, Ron Read, Ameeta E Singh
Trichomonas vaginalis prevalence (2.8%) in female sexually transmitted infection clinic attendees was within the prevalence of chlamydia (5.8%) and gonorrhea (1.8%), while being very low for male attendees (0.2%). Correlates among women were indigenous ethnicity, other ethnicity, and being symptomatic.
June 16, 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28876312/screening-for-sexually-transmitted-infections-in-adolescent-girls-and-young-women-in-mombasa-kenya-feasibility-prevalence-and-correlates
#9
Linnet N Masese, George Wanje, Emmanuel Kabare, Valentine Budambula, Francis Mutuku, Grace Omoni, Anisa Baghazal, Barbra A Richardson, R Scott McClelland
INTRODUCTION: As adolescents and young women become sexually active, they are at risk of adverse reproductive health outcomes including sexually transmitted infections (STIs). We assessed feasibility and acceptability of STI screening among 15- to 24-year-old women in Mombasa, Kenya. METHODS: After sensitization activities, participants were recruited from 3 high schools and 1 university. Study staff conducted informational sessions. Students interested in participating were given consent forms to take home, and invited to visit our clinic for STI screening...
June 28, 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28876306/incident-trichomonas-vaginalis-is-associated-with-partnership-concurrency-a-longitudinal-cohort-study
#10
Chris R Kenyon, Jozefien Buyze, Mark Klebanoff, Rebecca M Brotman
BACKGROUND: Sexual partner concurrency (PC) has been shown to be a risk factor for a number of sexually transmitted infections but it is unknown if it is a risk factor for Trichomonas vaginalis (TV). OBJECTIVE: We assess if there is an association between PC and incident TV infection. STUDY DESIGN: We used mixed effects logistic regression to assess the association between PC and incident TV in the Longitudinal Study of Vaginal Flora, a cohort study of 3620 women followed quarterly for 5 visits...
June 30, 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28875299/-1-h-13-c-and-15-n-resonance-assignments-and-secondary-structures-of-cyclophilin-2-from-trichomonas-vaginalis
#11
Tesmine Martin, Yuan-Chao Lou, Sarita Aryal, Jung-Hsiang Tai, Chinpan Chen
Cyclophilins are peptidyl prolyl isomerases that play an important role in a wide variety of biological functions like protein folding and trafficking, intracellular and extracellular signaling pathways, nuclear translocation and in pre-mRNA splicing. Two cyclophilins have been identified in the parasitic organism Trichomonas vaginalis and were named as TvCyP1 and TvCyP2. The 2 enzymes have been found to interact with Myb transcription factors in the parasite which regulate the iron induced expression of ap65-1 gene leading to cytoadherence of the parasite to human vaginal epithelial cells to cause the disease trichomoniasis...
September 5, 2017: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/28871927/sociodemographic-sexual-behavior-and-microbiological-profiles-of-men-attending-public-health-laboratories-for-testing-for-sexually-transmitted-diseases
#12
Mario Sviben, Sunčanica Ljubin-Sternak, Tomislav Meštrović, Jasmina Vraneš
In order to identify the groups at risk of sexually transmitted diseases (STDs), we assessed the sociodemographic profiles of men testing for STD, their sexual habits, and the results of microbiological analysis. During a three-year period, a total of 700 men older than 18 years of age completed the questionnaire regarding sociodemographic and sexual behavior. Urethral swabs were taken for microbiological analysis. Thirty-three percent of respondents reported not using condoms. Those that do not use condoms were predominantly less educated, unmarried but in steady relationships, employed, with children, and smokers...
July 2017: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28868962/prevalence-of-mycoplasma-genitalium-and-other-sexually-transmitted-infections-causing-urethritis-among-high-risk-heterosexual-male-patients-in-estonia
#13
Stanislav Tjagur, Reet Mändar, Margus Punab
BACKGROUND: We aimed to evaluate the prevalence of sexually transmitted infections (STI, including Mycoplasma genitalium, Chlamydia trachomatis, Neisseria gonorrhoeae, Trichomonas vaginalis) among high-risk heterosexual male patients and to clarify their potency to cause complaints and inflammation. METHODS: The study group included 825 men (18.0-49.5 y) consulting andrologist at Tartu University Hospital (Estonia) due to subjectively perceived risk of STI. Patients completed STI risk behaviour questionnaire...
September 4, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28838225/role-of-%C3%AE-actinin-2-in-cytoadherence-and-cytotoxicity-of-trichomonas-vaginalis
#14
Hye-Yeon Lee, Juri Kim, Soon-Jung Park
Trichomonas vaginalis is a pathogen that triggers severe immune responses in hosts. T. vaginalis α-actinin 2 (Tvα-actinin 2), has been used to diagnose trichomoniasis. Tvα-actinin 2 was dissected into three parts, the N-terminal, central, and C-terminal portions of the protein (#1, #2, and #3, respectively). Western blot of these Tvα-actinin 2 proteins with pooled patients' sera indicated that Tvα-actinin 2 #2 and #3, but not Tvα-actinin 2 #1, reacted with those sera. Immunofluorescence assays of two different forms of T...
August 25, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28809395/cryo-em-structures-of-the-80s-ribosomes-from-human-parasites-trichomonas-vaginalis-and-toxoplasma-gondii
#15
Zhifei Li, Qiang Guo, Lvqin Zheng, Yongsheng Ji, Yi-Ting Xie, De-Hua Lai, Zhao-Rong Lun, Xun Suo, Ning Gao
As an indispensable molecular machine universal in all living organisms, the ribosome has been selected by evolution to be the natural target of many antibiotics and small-molecule inhibitors. High-resolution structures of pathogen ribosomes are crucial for understanding the general and unique aspects of translation control in disease-causing microbes. With cryo-electron microscopy technique, we have determined structures of the cytosolic ribosomes from two human parasites, Trichomonas vaginalis and Toxoplasma gondii, at resolution of 3...
August 15, 2017: Cell Research
https://www.readbyqxmd.com/read/28806985/parents-and-teachers-views-on-sexual-health-education-and-screening-for-sexually-transmitted-infections-among-in-school-adolescent-girls-in-kenya-a-qualitative-study
#16
George Wanje, Linnet Masese, Ethel Avuvika, Anisa Baghazal, Grace Omoni, R Scott McClelland
BACKGROUND: To successfully develop and implement school-based sexual health interventions for adolescent girls, such as screening for Chlamydia trachomatis, Neisseria gonorrhoeae, and Trichomonas vaginalis, it is important to understand parents' and teachers' attitudes towards sexual health education and acceptability of sexually transmitted infection (STI) screening interventions. METHODS: In this qualitative study, we approached parents and teachers from three high schools to participate in in-depth interviews (IDIs) and focus-group discussions (FGDs)...
August 14, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28804083/vaginal-infections-in-haitian-immigrant-women-living-in-miami-florida
#17
Julia Seay, Morgan Mandigo, Karina Hew, Erin Kobetz
OBJECTIVE: To characterize vulvovaginal candidiasis (VC), trichomonas vaginalis (TV), and bacterial vaginosis (BV) among Haitian women living in Miami to identify contributing factors to cervical cancer disparity in this population. METHODS: Using a CBPR framework, 246 Haitian women (ages 21-65) were recruited. Self-collected cervical cytology specimens were analyzed for VC, TV, and BV. RESULTS: The proportion of participants with VC, TV, and BV, were 7...
2017: Journal of Health Care for the Poor and Underserved
https://www.readbyqxmd.com/read/28803864/the-detection-of-microorganisms-related-to-urethritis-from-the-oral-cavity-of-male-patients-with-urethritis
#18
Phuong Thi Le, Ryoichi Hamasuna, Masahiro Matsumoto, Keiichi Furubayashi, Masayuki Hatanaka, Shuichi Kawai, Takamasa Yamaguchi, Kazutaka Uehara, Norihiko Murakami, Masaru Yoshioka, Ken Nakayama, Yutaka Shiono, Keisuke Muraoka, Masahiko Suzuki, Naohiro Fujimoto, Tetsuro Matsumoto
OBJECTIVES: To investigate the presence of microorganisms related to urethritis in the oral cavity of male patients with urethritis and the efficacies of antimicrobials for urethritis on microorganisms in the oral cavity. METHODS: Ninety-two male patients with urethritis and 17 male controls participated to this study at 12 urology clinics in Japan between March 2014 and March 2015. The first voided urine (FVU) and oral wash fluid (OWF) specimens were collected from the participants...
October 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28803140/a-competent-catalytic-active-site-is-necessary-for-substrate-induced-dimer-assembly-in-triosephosphate-isomerase
#19
Pedro Jimenez-Sandoval, Jose Luis Vique-Sanchez, Marisol López Hidalgo, Gilberto Velazquez-Juarez, Corina Diaz-Quezada, Luis Fernando Arroyo-Navarro, Gabriela Montero Moran, Juliana Fattori, A Jessica Diaz-Salazar, Enrique Rudiño-Pinera, Rogerio Sotelo-Mundo, Ana Carolina Migliorini Figueira, Samuel Lara-Gonzalez, Claudia G Benítez-Cardoza, Luis G Brieba
The protozoan parasite Trichomonas vaginalis contains two nearly identical triosephosphate isomerases (TvTIMs) that dissociate into stable monomers and dimerize upon substrate binding. Herein, we compare the role of the "ball and socket" and loop 3 interactions in substrate assisted dimer assembly in both TvTIMs. We found that point mutants at the "ball" are only 39 and 29-fold less catalytically active than their corresponding wild-type counterparts, whereas Δloop 3 deletions are 1502 and 9400-fold less active...
August 9, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28799824/high-prevalence-of-asymptomatic-sexually-transmitted-infections-among-human-immunodeficiency-virus-infected-pregnant-women-in-a-low-income-south-african-community
#20
Maanda Mudau, Remco P Peters, Lindsey De Vos, Dawie H Olivier, Dvora J Davey, Edwin S Mkwanazi, James A McIntyre, Jeffrey D Klausner, Andrew Medina-Marino
There is a lack of evidence on the burden of Chlamydia trachomatis (CT), Neisseria gonorrhoeae (NG) and Trichomonas vaginalis (TV) among HIV-infected pregnant women in South Africa. We conducted a cross-sectional analysis of HIV-infected pregnant women in two healthcare facilities in a South African township to determine the prevalence of CT, NG and TV. HIV-infected pregnant women were recruited during the first antenatal care visit for their current pregnancy and requested to self-collect vulvovaginal swab specimens...
January 1, 2017: International Journal of STD & AIDS
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