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Blastocystis sp

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https://www.readbyqxmd.com/read/28262486/lateral-gene-transfer-in-the-adaptation-of-the-anaerobic-parasite-blastocystis-to-the-gut
#1
Laura Eme, Eleni Gentekaki, Bruce Curtis, John M Archibald, Andrew J Roger
Blastocystis spp. are the most prevalent eukaryotic microbes found in the intestinal tract of humans. Here we present an in-depth investigation of lateral gene transfer (LGT) in the genome of Blastocystis sp. subtype 1. Using rigorous phylogeny-based methods and strict validation criteria, we show that ∼2.5% of the genes of this organism were recently acquired by LGT. We identify LGTs both from prokaryote and eukaryote donors. Several transfers occurred specifically in ancestors of a subset of Blastocystis subtypes, demonstrating that LGT is an ongoing process...
March 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28224033/distribution-and-risk-factors-associated-with-intestinal-parasite-infections-among-children-with-gastrointestinal-disorders
#2
Hamed Kiani, Ali Haghighi, Roya Salehi, Eznollah Azargashb
AIM: Prevalence and risk factors associated with intestinal parasites among children ≤ 12 years old in Nahavand county western Iran, was the objective of this search. BACKGROUND: Intestinal parasites (IPs) are important health problems among most societies. METHODS: This cross sectional study was carried out during 6 months from April to September 2014 in Nahavand County western Iran. Fecal samples were collected from 500 children suffering from gastrointestinal disorders (GIDs) and examined by macroscopy and microscopic (using saline and iodine wet mount, formalin-ether sedimentation, Trichrome and modified Ziehl Neelsen staining) methods...
December 2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28088334/subtype-identification-of-human-blastocystis-spp-isolated-from-lao-people-s-democratic-republic
#3
Oranuch Sanpool, Sakhone Laymanivong, Tongjit Thanchomnang, Rutchanee Rodpai, Lakkhana Sadaow, Issarapong Phosuk, Wanchai Maleewong, Pewpan M Intapan
Blastocystis sp. is the most common protist found in the intestinal tract of humans and animals. Blastocystis subtypes (STs) are classified based on the molecular phylogeny of the small subunit rRNA gene (SSU rDNA). At least 17 Blastocystis STs have been reported and, of these, STs 1-9 have been found in humans. This study revealed the presence of human Blastocystis STs in Lao People's Democratic Republic (Lao PDR). Fecal samples were collected from apparently healthy people from the central province of Khammouane and the southern province of Champasak...
January 11, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28060901/molecular-epidemiology-of-blastocystis-sp-in-various-animal-groups-from-two-french-zoos-and-evaluation-of-potential-zoonotic-risk
#4
Amandine Cian, Dima El Safadi, Marwan Osman, Romain Moriniere, Nausicaa Gantois, Sadia Benamrouz-Vanneste, Pilar Delgado-Viscogliosi, Karine Guyot, Luen-Luen Li, Sébastien Monchy, Christophe Noël, Philippe Poirier, Céline Nourrisson, Ivan Wawrzyniak, Frédéric Delbac, Stéphanie Bosc, Magali Chabé, Thierry Petit, Gabriela Certad, Eric Viscogliosi
Blastocystis sp. is a common intestinal parasite infecting humans and a wide range of animals worldwide. It exhibits an extensive genetic diversity and 17 subtypes (STs) have thus far been identified in mammalian and avian hosts. Since several STs are common to humans and animals, it was proposed that a proportion of human infections may result from zoonotic transmission. However, the contribution of each animal source to human infection remains to be clarified. Therefore, the aim of this study was to expand our knowledge of the epidemiology and host specificity of this parasite by performing the largest epidemiological survey ever conducted in animal groups in terms of numbers of species screened...
2017: PloS One
https://www.readbyqxmd.com/read/28007484/diagnosis-of-intestinal-parasites-in-a-rural-community-of-venezuela-advantages-and-disadvantages-of-using-microscopy-or-rt-pcr
#5
COMPARATIVE STUDY
Renzo Nino Incani, Elizabeth Ferrer, Denise Hoek, Robbert Ramak, Jeroen Roelfsema, Lapo Mughini-Gras, Titia Kortbeek, Elena Pinelli
A cross-sectional study was carried out to determine the prevalence and diagnostic performance of microscopy and real time PCR (RT-PCR) for 14 intestinal parasites in a Venezuelan rural community with a long history of persistent intestinal parasitic infections despite the implementation of regular anthelminthic treatments. A total of 228 participants were included in this study. A multiplex RT-PCR was used for the detection of Dientamoeba fragilis, Giardia intestinalis, Cryptosporidium sp. and a monoplex RT-PCR for Entamoeba histolytica...
March 2017: Acta Tropica
https://www.readbyqxmd.com/read/27920396/prevalence-and-subtype-identification-of-blastocystis-sp-in-healthy-individuals-in-the-tunis-area-tunisia
#6
Imène Ben Abda, Nabil Maatoug, Rania Ben Romdhane, Nada Bouhelmi, Najet Zallegua, Karim Aoun, Eric Viscogliosi, Aïda Bouratbine
Blastocystis sp. is currently the most common eukaryotic parasite found in humans. Despite its potential public health impact, epidemiological data regarding its prevalence and molecular subtype (ST) distribution in Maghreb are rarely reported. Therefore, the aim of this study was to determine the prevalence of the parasite in a cohort of healthy food handler Tunisian individuals and to acquire the first molecular data regarding the distribution of Blastocystis sp. STs in this country. Therefore, 524 fecal samples were collected, and 68 of them (13%) were identified as positive for the parasite by direct-light microscopy of smears...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27905282/distribution-of-parasites-detected-in-stool-samples-of-patients-admitted-to-our-parasitology-laboratory-during-a-three-year-period-between-2012-and-2014
#7
Mehmet Burak Selek, Bayhan Bektöre, Ergenekon Karagöz, Orhan Baylan, Mustafa Özyurt
OBJECTIVE: Parasitic diseases are among the major public health issues worldwide. A number of tests are available for diagnosis, but the sentivity and specifity of these tests are assumed to be insufficient. Nevertheless, the most common diagnostic method is microscopic examination. In this study, we aimed to introduce the distribution of parasites detected in stool samples of patients admitted to our laboratory on the basis of parameters such as, age, and gender during a 3-year period between 2012 and 2014...
September 2016: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/27847411/zoonotic-intestinal-protozoan-of-the-wild-boars-sus-scrofa-in-persian-gulf-s-coastal-area-bushehr-province-southwestern-iran
#8
Kambiz Yaghoobi, Bahador Sarkari, Majid Mansouri, Mohammad Hossein Motazedian
AIM: Wild boars, Sus scrofa, are potential reservoirs of many zoonotic diseases, and there are a possibility of transmission of the zoonotic diseases from these animals to humans and also domestic animals. This study aimed to evaluate the protozoan contamination of wild boars in the Persian Gulf's coastal area (Bushehr Province), southwestern Iran. MATERIALS AND METHODS: A total of 25 crossbred boars were collected during a course of vertebrate pest control in Bushehr province, in 2013...
October 2016: Veterinary World
https://www.readbyqxmd.com/read/27770759/subtype-analysis-of-blastocystis-sp-isolates-from-asymptomatic-individuals-in-an-urban-community-in-the-philippines
#9
Davin Edric V. Adao, Ace O. Dela Serna, Maria Luz B. Belleza, Nicole R. Bolo, Windell L. Rivera
Blastocystis sp. is a commonly reported enteric protistan parasite in faecal specimens with a worldwide distribution afflicting both humans and a wide range of animals. The aim of this study is to characterize the subtypes (STs) of Blastocystis sp. isolates from asymptomatic individuals in an urban community in Pateros, Metro Manila, Philippines. The 600-bp small subunit ribosomal RNA (SSU rRNA) barcoding region of Blastocystis sp. isolates was amplified and sequenced using the primers RD5 and BhRDr. Subtypes were identified by uploading the sequences onto the Basic Local Alignment and Search Tool (BLAST) websites, the Blastocystis Subtype (18S) and Sequence Typing (MLST) Database and by construction of a phylogenetic tree...
October 1, 2016: Annals of Parasitology
https://www.readbyqxmd.com/read/27761331/occurrence-of-blastocystis-sp-in-water-catchments-at-malay-villages-and-aboriginal-settlement-during-wet-and-dry-seasons-in-peninsular-malaysia
#10
Samseh Abdullah Noradilah, Ii Li Lee, Tengku Shahrul Anuar, Fatmah Md Salleh, Siti Nor Azreen Abdul Manap, Noor Shazleen Husnie Mohd Mohtar, Syed Muhamad Azrul, Wan Omar Abdullah, Norhayati Moktar
In the tropics, there are too few studies on isolation of Blastocystis sp. subtypes from water sources; in addition, there is also an absence of reported studies on the occurrence of Blastocystis sp. subtypes in water during different seasons. Therefore, this study was aimed to determine the occurrence of Blastocystis sp. subtypes in river water and other water sources that drained aboriginal vicinity of highly endemic intestinal parasitic infections during wet and dry seasons. Water samples were collected from six sampling points of Sungai Krau (K1-K6) and a point at Sungai Lompat (K7) and other water sources around the aboriginal villages...
2016: PeerJ
https://www.readbyqxmd.com/read/27741951/epidemiological-and-clinical-profile-of-adult-patients-with-blastocystis-sp-infection-in-barcelona-spain
#11
Fernando Salvador, Elena Sulleiro, Adrián Sánchez-Montalvá, Carmen Alonso, Javier Santos, Isabel Fuentes, Israel Molina
BACKGROUND: Blastocystis spp. are among the most frequently observed intestinal parasites in humans. Despite the discovery of Blastocystis approximately 100 years ago, limited information is available regarding its pathogenesis, genetic diversity, and available treatment options. The aim of this study was to describe the epidemiological and clinical characteristics of patients with Blastocystis sp. infections diagnosed at Vall d'Hebron University Hospital (Barcelona, Spain). METHODS: A retrospective observational study was performed which included all adult patients who attended Vall d'Hebron University Hospital from February 2009 to March 2014 that had Blastocystis sp...
October 14, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27659930/asymptomatic-effluent-protozoa-colonization-in-peritoneal-dialysis-patients
#12
Liliana Simões-Silva, Inês Correia, Joana Barbosa, Carla Santos-Araujo, Maria João Sousa, Manuel Pestana, Isabel Soares-Silva, Benedita Sampaio-Maia
Currently, chronic kidney disease (CKD) is a global health problem. Considering the impaired immunity of CKD patients, the relevance of infection in peritoneal dialysis (PD), and the increased prevalence of parasites in CKD patients, protozoa colonization was evaluated in PD effluent from CKD patients undergoing PD. Overnight PD effluent was obtained from 49 asymptomatic stable PD patients. Protozoa analysis was performed microscopically by searching cysts and trophozoites in direct wet mount of PD effluent and after staining smears...
September 2016: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
https://www.readbyqxmd.com/read/27566417/prevalence-risk-factors-for-infection-and-subtype-distribution-of-the-intestinal-parasite-blastocystis-sp-from-a-large-scale-multi-center-study-in-france
#13
Dima El Safadi, Amandine Cian, Céline Nourrisson, Bruno Pereira, Christelle Morelle, Patrick Bastien, Anne-Pauline Bellanger, Françoise Botterel, Ermanno Candolfi, Guillaume Desoubeaux, Laurence Lachaud, Florent Morio, Christelle Pomares, Meja Rabodonirina, Ivan Wawrzyniak, Frédéric Delbac, Nausicaa Gantois, Gabriela Certad, Laurence Delhaes, Philippe Poirier, Eric Viscogliosi
BACKGROUND: Blastocystis sp. is the most common intestinal parasite of humans. Despite its potential public health impact, epidemiological data regarding the prevalence and molecular subtype distribution of Blastocystis sp. in Europe are rarely reported. Therefore, the first multi-center epidemiological survey performed in Europe was conducted in France to diagnose and subtype Blastocystis sp. and to identify risk factors for infection. METHODS: Stool samples from 788 patients were collected either in summer or winter in 11 hospitals throughout France together with patient data...
2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27496143/a-decade-of-intestinal-protozoan-epidemiology-among-settled-immigrants-in-qatar
#14
Marawan A Abu-Madi, Jerzy M Behnke, Sonia Boughattas, Asma Al-Thani, Sanjay H Doiphode
BACKGROUND: The World Health Organization estimates that about 3.5 billion people worldwide are affected by intestinal parasitic infections. Reports have already emphasized the role of immigrants in outbreaks of parasitic diseases in industrialized countries. With the mass influx of immigrants to Qatar, patent intestinal parasitic infections have been observed. Herein, the prevalence of intestinal protozoan infections was analysed in 29,286 records of subjects referred for stool examination at the Hamad Medical Corporation over the course of a decade (2005 to 2014, inclusive)...
2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27476606/comparison-of-the-genetic-variability-of-blastocystis-subtypes-between-human-carriers-from-two-contrasting-climatic-regions-of-m%C3%A3-xico
#15
Isaac Villegas-Gómez, Fernando Martínez-Hernández, Alejandro Urrea-Quezada, Mariana González-Díaz, María Durazo, Jesús Hernández, Guadalupe Erendira Orozco-Mosqueda, Guiehdani Villalobos, Pablo Maravilla, Olivia Valenzuela
Blastocystis sp. is an anaerobic intestinal microorganism commonly identified in the feces of several animals, including humans. Blastocystis exhibits high genetic polymorphism and at least 17 subtypes (ST) have been identified; ST1-ST3 are frequently found in the Americas. Furthermore, in vitro assays have shown that temperature and humidity can affect the viability of Blastocystis cysts. In this study, we describe the genetic variability and genetic differentiation among and within Blastocystis STs in adults and children from the cities of Hermosillo and Morelia cities, which represent arid and humid subtropical climatic regions of México, respectively...
October 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27471855/granular-formation-during-apoptosis-in-blastocystis-sp-exposed-to-metronidazole-mtz
#16
Devi Balkrishnan Dhurga, Kumar Suresh, Tian Chye Tan
The role and function of the granular life cycle stage in Blastocystis sp, remains uncertain despite suggestions being made that the granules are metabolic, reproductive and lipid in nature. This present study aims to understand granular formation by triggering apoptosis in Blastocystis sp. by treating them with metronidazole (MTZ). Blastocystis sp.cultures of 4 sub-types namely 1, 2, 3 and 5 when treated with 0.01 and 0.0001 mg/ml of metronidazole (MTZ) respectively showed many of the parasites to be both viable and apoptotic (VA)...
2016: PloS One
https://www.readbyqxmd.com/read/27468042/blastocystis-sp-and-blastocystis-ratti-in-a-brazilian-porcupine-coendou-prehensilis-with-diarrhea
#17
Alexandra M Goe, Darryl J Heard, J Roger Easley, Amy L Weeden, April L Childress, James F X Wellehan
A hand-raised, 5-mo-old, intact male Brazilian porcupine (Coendou prehensilis) was evaluated for chronic diarrhea, failure to thrive, and anorexia. On presentation the porcupette was dull, dehydrated, and passing yellow, malodourous, watery diarrhea. Cytologic examination of feces revealed a large number of organisms, morphologically consistent with Blastocystis. Blastocystis polymerase chain reaction (PCR) performed on feces was positive. Direct sequencing on two sequential samples confirmed the presence of Blastocystis ratti and a novel Blastocystis sequence...
June 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/27447173/evaluation-of-the-nanochip%C3%A2-gastrointestinal-panel-gip-test-for-simultaneous-detection-of-parasitic-and-bacterial-enteric-pathogens-in-fecal-specimens
#18
Shifra Ken Dror, Elsa Pavlotzky, Mira Barak
Infectious gastroenteritis is a global health problem associated with high morbidity and mortality rates. Rapid and accurate diagnosis is crucial to allow appropriate and timely treatment. Current laboratory stool testing has a long turnaround time (TAT) and demands highly qualified personnel and multiple techniques. The need for high throughput and the number of possible enteric pathogens compels the implementation of a molecular approach which uses multiplex technology, without compromising performance requirements...
2016: PloS One
https://www.readbyqxmd.com/read/27367710/monitoring-of-waterborne-parasites-in-two-drinking-water-treatment-plants-a-study-in-sarawak-malaysia
#19
Reena Leeba Richard, Init Ithoi, Mohamad Azlan Abd Majid, Wan Yusoff Wan Sulaiman, Tian Chye Tan, Veeranoot Nissapatorn, Yvonne Ai Lian Lim
The occurrence of waterborne parasites coupled with water parameters at various processing sites of two drinking water treatment plants (A and B) and seven distribution system (DS) sites in Sarawak, Malaysia were studied. Ten liters of water underwent immunomagnetic separation (IMS) technique to detect the presence of Giardia and Cryptosporidium (oo)cysts. The remaining supernatant was used to detect other parasites whilst 50 mL of water sample was each used in the detection of free-living amoebae and fecal coliforms...
2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27356981/high-occurrence-of-blastocystis-sp-subtypes-1-3-and-giardia-intestinalis-assemblage-b-among-patients-in-zanzibar-tanzania
#20
Joakim Forsell, Margareta Granlund, Linn Samuelsson, Satu Koskiniemi, Helén Edebro, Birgitta Evengård
BACKGROUND: Blastocystis is a common intestinal parasite with worldwide distribution but the distribution of Blastocystis and its subtypes in East Africa is largely unknown. In this study, we investigate the distribution of Blastocystis subtypes in Zanzibar, Tanzania and report the prevalence of intestinal parasites using both molecular methods and microscopy. METHODS: Stool samples were collected from both diarrhoeic and non-diarrhoeic outpatients in Zanzibar. In addition to microscopy, real-time PCR for Blastocystis, Entamoeba histolytica and E...
June 29, 2016: Parasites & Vectors
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