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https://www.readbyqxmd.com/read/28324738/protist-evolution-stealing-genes-to-gut-it-out
#1
David Moreira, Purificación López-García
The amount and evolutionary impact of horizontal gene transfer in eukaryotes remain contentious issues. A new phylogenomic study suggests that gene transfer from prokaryotes has contributed significantly to the adaptation and metabolic evolution of Blastocystis, the most widespread human gut eukaryotic parasite.
March 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28279442/low-efficacy-of-metronidazole-in-the-eradication-of-blastocystis-hominis-in-symptomatic-patients-case-series-and-systematic-literature-review
#2
Lissette Batista, Josefa Pérez Jove, Mercè Rosinach, Victoria Gonzalo, Empar Sainz, Carme Loras, Montserrat Forné, Maria Esteve, Fernando Fernández-Bañares
INTRODUCTION: Blastocystis hominis (B. hominis) is a protozoan commonly found in the gastrointestinal tract. There are doubts about its clinical significance. Metronidazole (MTZ) is the recommended first-line treatment. MATERIALS AND METHODS: A retrospective review was carried out between 2011 and 2012. A total of 151 samples were randomly selected from 383 samples positive for B. hominis. Inclusion criteria were: suggestive symptoms, treatment indication and microbiological follow-up...
March 6, 2017: Gastroenterología y Hepatología
https://www.readbyqxmd.com/read/28273080/geospatial-distribution-of-intestinal-parasitic-infections-in-rio-de-janeiro-brazil-and-its-association-with-social-determinants
#3
Clarissa Perez Faria, Graziela Maria Zanini, Gisele Silva Dias, Sidnei da Silva, Marcelo Bessa de Freitas, Ricardo Almendra, Paula Santana, Maria do Céu Sousa
BACKGROUND: Intestinal parasitic infections remain among the most common infectious diseases worldwide. This study aimed to estimate their prevalence and provide a detailed analysis of geographical distribution of intestinal parasites in the metropolitan region of Rio de Janeiro, considering demographic, socio-economic, and epidemiological contextual factors. METHODS/PRINCIPAL FINDINGS: The cross-section survey was conducted among individuals attending the Evandro Chagas National Institute of Infectious Diseases (FIOCRUZ, RJ) during the period from April 2012 to February 2015...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28270802/molecular-epidemiology-of-giardia-blastocystis-and-cryptosporidium-among-indigenous-children-from-the-colombian-amazon-basin
#4
Angie Sánchez, Marina Munoz, Natalia Gómez, Juan Tabares, Laura Segura, Ángela Salazar, Cristian Restrepo, Miguel Ruíz, Patricia Reyes, Yuchen Qian, Lihua Xiao, Myriam C López, Juan D Ramírez
The incidence and prevalence of intestinal parasites in children is most likely due to lack of natural or acquired resistance and differences in behavior and habits closely related to environmental and socioeconomic determinants. The most important protozoa that parasitize humans are Giardia, Entamoeba, Blastocystis, and Cryptosporidium. These parasites present wide intraspecific genetic diversity and subsequently classified into assemblages and subtypes. The Amazon basin is the largest in the world and is the fifth freshwater reserve on the planet...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28262486/lateral-gene-transfer-in-the-adaptation-of-the-anaerobic-parasite-blastocystis-to-the-gut
#5
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/28255818/screening-of-protozoan-and-microsporidian-parasites-in-feces-of-great-cormorant-phalacrocorax-carbo
#6
Piotr Rzymski, Anna Słodkowicz-Kowalska, Piotr Klimaszyk, Piotr Solarczyk, Barbara Poniedziałek
The global population of great cormorants (Phalacrocorax carbo L.) is on the rise. These birds, characterized by rapid metabolism, can deposit large quantities of feces, and because they breed on the land but forage on water, both terrestrial and aquatic environments can be simultaneously affected by their activities. The contribution of great cormorants in the dispersal of bacterial and viral pathogens has been immensely studied; whereas, the occurrence of eukaryotic parasites such as protozoans and microsporidians in these birds is little known...
March 2, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28238960/inter-and-intra-subtype-variation-of-blastocystis-subtypes-isolated-from-diarrheic-and-non-diarrheic-patients-in-iran
#7
Atefe Alinaghizade, Hamed Mirjalali, Mehdi Mohebali, Christen Rune Stensvold, Mostafa Rezaeian
Blastocystis is a common intestinal parasitic protist infecting birds and mammals. Blastocystis comprises at least 17 subtypes (ST), of which ST1-ST9 have been detected in humans. Significant correlation between certain subtypes and pathogenicity remains to be established. Nevertheless, some studies suggest a potential linkage between subtypes (inter- and intra-subtype variation) and clinical manifestations. The aim of this study was to identify intra-subtype genetic variation of subtypes of Blastocystis in stools samples submitted by diarrheic and non-diarrheic patients...
February 24, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28224033/distribution-and-risk-factors-associated-with-intestinal-parasite-infections-among-children-with-gastrointestinal-disorders
#8
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/28224032/prevalence-of-intestinal-parasites-in-referred-individuals-to-the-medical-centers-of-tonekabon-city-mazandaran-province
#9
Samira Shahdoust, Maryam Niyyati, Ali Haghighi, Eznoallah Azargashb, Mohammad Reza Khataminejad
AIM: The aim of the present study was to determine the prevalence of intestinal parasites and their relation with socio-demographic data in referred individuals to the medical centers in Tonekabon, Mazandaran province, 2015. BACKGROUND: Due to the climatic and ecological conditions in Mazandaran province, determination of the status of intestinal parasites among referred individuals to the medical centers of Tonekabon city can help researchers and healthcare services to prevent and/or control of parasitic infection in this region...
December 2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28222192/blastocystis-subtyping-and-its-association-with-intestinal-parasites-in-children-from-different-geographical-regions-of-colombia
#10
Juan David Ramírez, Carolina Flórez, Mario Olivera, María Consuelo Bernal, Julio Cesar Giraldo
Blastocystis is a common enteric protist colonizing probably more than 1 billion people with a large variety of non-human hosts. Remarkable genetic diversity has been observed, leading to the subdivision of the genus into multiple subtypes (ST), some of which are exclusively found in non-human hosts. The aim of this study was to determine the distribution of Blastocystis STs/18S alleles in symptomatic (abdominal pain, anal pruritus, diarrhea, headache, nauseas and/or vomit) and asymptomatic children from nine geographical regions of Colombia...
2017: PloS One
https://www.readbyqxmd.com/read/28167596/epidemiology-and-prevalence-of-blastocystis-spp-in-north-cyprus
#11
Ayse Seyer, Djursun Karasartova, Emrah Ruh, Ayse Semra Güreser, Ebru Turgal, Turgut Imir, Aysegul Taylan Ozkan
This study was conducted to investigate the prevalence of Blastocystis spp. and its subtypes (STs) in North Cyprus; and to evaluate the presence of this parasite and its STs with respect to demographic, socioeconomic, and epidemiological factors, as well as gastrointestinal symptoms. Stool samples were collected from 230 volunteers. Each participant also filled out a questionnaire. The samples were examined microscopically by native-Lugol and trichrome methods and further tested by polymerase chain reaction (PCR) and sequencing...
February 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28127364/prevalence-of-strongyloides-stercoralis-and-other-intestinal-parasites-among-institutionalized-mentally-disabled-individuals-in-rasht-northern-iran
#12
Amin Saeidinia, Ilnaz Tavakoli, Mohammad Reza Naghipour, Behnaz Rahmati, Hossein Ghavami Lahiji, Omid Salkhori, Keyhan Ashrafi
BACKGROUND: We aimed to determine the status of strongyloidiasis in mentally disabled population in the institutional places in Rasht City, the capital of Guilan Province, northern Iran. METHODS: This cross-sectional study was conducted in 8 institutions for mentally retarded population in Rasht in 2013. Before collecting the samples, a questionnaire was filled out for each participant by an expert person. A single stool sample was obtained from each of the 173 subjects and examined using direct wet mount, formalin-ether concentration technique and agar plate culture method...
October 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28096858/prevalence-of-intestinal-parasitic-infections-in-jiroft-kerman-province-iran
#13
Maryam Barkhori Mahni, Mostafa Rezaeian, Eshrat Beigom Kia, Ahmad Raeisi, Khadijeh Khanaliha, Fatemeh Tarighi, Bahare Kamranrashani
BACKGROUND: Intestinal parasitic infections have a worldwide distribution. High prevalence of intestinal parasitic infections in individuals with low socioeconomic status and environmental conditions was found. No study has ever been conducted on the prevalence of these infections in Jiroft. Therefore, in this study prevalence of intestinal parasitic infections was evaluated in Jiroft, Kerman Province, Iran. METHODS: A total of 1060 individuals from rural and urban areas of Jiroft were sampled accidentally, during 2013-2014...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28088334/subtype-identification-of-human-blastocystis-spp-isolated-from-lao-people-s-democratic-republic
#14
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/28087441/blastocystis-and-irritable-bowel-syndrome-frequency-and-subtypes-from-iranian-patients
#15
Shahram Khademvatan, Rahim Masjedizadeh, Fakher Rahim, Hamidreza Mahbodfar, Roya Salehi, Ehsan Yousefi-Razin, Masoud Foroutan
There are inconsistent findings about the role of Blastocystis infection in irritable bowel syndrome (IBS). The present study was aimed to determine the frequency of Blastocystis and their subtypes (ST) in patients with IBS. A total of 122 patients with IBS and 122 healthy individuals referred to the medical laboratory centers in Ahvaz (southwest of Iran) participated in the study. The frequency of Blastocystis was determined. Blastocystis genomic DNA was extracted from positive feces, and PCR was performed using seven primer pairs targeting the SSU rDNA gene...
April 2017: Parasitology International
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
#16
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/28056072/clarifying-the-cryptic-host-specificity-of-blastocystis-spp-isolates-from-alouatta-palliata-and-a-pigra-howler-monkeys
#17
Claudia Villanueva-Garcia, Elias Jose Gordillo-Chavez, Eduardo Lopez-Escamilla, Emilio Rendon-Franco, Claudia Irais Muñoz-Garcia, Lilia Gama, Williams Arony Martinez-Flores, Nayeli Gonzalez-Rodriguez, Mirza Romero-Valdovinos, Hilda Diaz-Lopez, Jose Galian, Guiehdani Villalobos, Pablo Maravilla, Fernando Martinez-Hernandez
Although the presence of cryptic host specificity has been documented in Blastocystis, differences in infection rates and high genetic polymorphism within and between populations of some subtypes (ST) have impeded the clarification of the generalist or specialist specificity of this parasite. We assessed the genetic variability and host specificity of Blastocystis spp. in wild howler monkeys from two rainforest areas in the southeastern region of Mexico. Fecal samples of 225 Alouatta palliata (59) and A. pigra (166) monkeys, belonging to 16 sylvatic sites, were analyzed for infection with Blastocystis ST using a region of the small subunit rDNA (SSUrDNA) gene as a marker...
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
#18
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/27989831/subtype-distribution-of-blastocystis-spp-isolated-from-children-in-eskisehir-turkey
#19
Nihal Dogan, Merve Aydin, Nazmiye Ulku Tuzemen, Ener Cagri Dinleyici, Ilkiz Oguz, Funda Dogruman-Al
Blastocystis spp. is the most common enteric protist found in human feces. The pathogenic role of Blastocystis remains controversial and it has been suggested that the symptomatology of Blastocystis is associated with its subtypes (ST). However, only few studies have investigated the relationship between the symptomatology and subtypes of Blastocystis in children. This study aimed to investigate the prevalence of Blastocystis in children aged 3 to 13years with or without gastrointestinal complaints and determine the distribution of the subtypes of Blastocystis...
October 27, 2016: Parasitology International
https://www.readbyqxmd.com/read/27981305/association-of-enteric-protist-blastocystis-spp-and-gut-microbiota-with-hepatic-encephalopathy
#20
Sedat Yildiz, İbrahim Doğan, Funda Doğruman-Al, Ufuk Nalbantoğlu, Duran Üstek, Fakhriddin Sarzhanov, Süleyman Yildirim
BACKGROUND AND AIMS: Hepatic encephalopathy (HE) is a serious neuropsychiatric sequela emerging in the advanced stages of cirrhosis. The gut microbiota plays an important role in the development of HE. The aim of the study was to analyze the dynamic interplay between microbiota and Blastocystis in cirrhotic patients with or without encephalopathy. METHODS: The study was designed as cross-sectional study. A total of 37 patients from the Ankara city, admitted to the University Hospital within a 6-month period prior to enrolment into the study were included in the study...
December 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
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