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Blastocystis

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https://www.readbyqxmd.com/read/28619673/molecular-characterization-of-blastocystis-from-pigs-in-shaanxi-province-of-china
#1
Jun-Ke Song, Rui-Si Hu, Xian-Cheng Fan, Sha-Sha Wang, Hui-Jun Zhang, Guang-Hui Zhao
Blastocystis is an enteric eukaryote of mystery for its ubiquitous presence in animals and humans worldwide and a broad diversity genetically. The animals have been suggested to be an important reservoir to transmit Blastocystis to humans because of high colonization frequency and the presence of zoonotic subtypes. In the present study, the prevalence and subtypes of Blastocystis in pigs in Shaanxi province of China were determined using the molecular technique based on the small subunit rRNA (SSU rRNA) gene fragment...
June 12, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28614462/-cross-sectional-study-of-intestinal-parasitosis-in-child-populations-in-argentina
#2
Graciela Teresa Navone, María Lorena Zonta, Paola Cociancic, Mariela Garraza, María Inés Gamboa, Luis Alberto Giambelluca, Silvia Dahinten, Evelia Edith Oyhenart
Objective: Determine the distribution of intestinal parasitosis in children in nine provinces representative of Argentina's mosaic of contrasting environments. Methods: Descriptive, observational, cross-sectional study of preschool children (5 years old or under) and school-age children (6-14 years) in the provinces of Buenos Aires (sample taken between 2005 and 2013), Chubut (2010-2013), Corrientes (2012), Entre Ríos (2010-2012), Formosa (2014), La Pampa (2006), Mendoza (2008-2011), Misiones (2005-2008 and 2013), and Salta (2012-2013)...
June 8, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28599633/prevalence-of-intestinal-parasitic-infection-and-associated-risk-factors-among-village-health-volunteers-in-rural-communities-of-southern-thailand
#3
Chuchard Punsawad, Nonthapan Phasuk, Suchirat Bunratsami, Kanjana Thongtup, Niramon Siripakonuaong, Somchok Nongnaul
BACKGROUND: Intestinal parasitic infections remain prevalent and constitute a public health problem in certain rural areas of Thailand. Village health volunteers (VHVs), who are members of a Thai healthcare alliance, function as key providers of health prevention measures, disease control, and health education and share national health promotion campaigns with community members. This study is aimed at evaluating the prevalence, intensity, and risk factors for intestinal parasitic infection in VHVs in order to design community awareness and health education campaigns for the target population...
June 9, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28540508/molecular-characterization-of-blastocystis-sp-in-captive-wild-animals-in-qinling-mountains
#4
G H Zhao, X F Hu, T L Liu, R S Hu, Z Q Yu, W B Yang, Y L Wu, S K Yu, J K Song
Blastocystis is one common protist inhabiting in gastrointestinal tracts of animals and humans. Examining the subtypes has important implications for assessing the zoonotic potential of Blastocystis and intestinal health of hosts. In the present study, a total of 497 fecal samples collected from 37 wild animal species in Qinling Mountains were investigated for the presence and subtypes of Blastocystis. Of them, 200 (40.2%) were positive for Blastocystis and 13 subtypes were found, including eight known subtypes (STs1-3, 5, 10, 12-14) and five possible novel subtypes (temporarily named as STs18-22), with ST10 as the predominate subtype and the subtype ST5 was detected in an ostrich for the first time...
May 24, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28483729/presence-of-parasites-in-environmental-waters-in-samsun-and-its-districts
#5
Ülkü Karaman, Zeynep Kolören, Onuralp Seferoğlu, Emine Ayaz, Elif Demirel
OBJECTIVE: The aim of this study was to detect the presence of parasites in environmental waters in Samsun and its districts. METHODS: At the center of Samsun, 13 stations were determined. The research was performed between March 2012 and February 2013, and every month, water samples were collected on the dates stated. The samples were stained with Kinyoun acid-fast, modified trichrome, and trichrome dyes after examining with the direct bond. The preparations were evaluated in terms of parasitologic under a light microscope...
March 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/28413436/predominance-and-association-risk-of-blastocystis-hominis-subtype-i-in-colorectal-cancer-a-case-control-study
#6
Amr Mohamed Mohamed, Mona Abdelfattah Ahmed, Sabah Abdelghany Ahmed, Sherif Ahmed Al-Semany, Saad Saed Alghamdi, Dina Abdulla Zaglool
BACKGROUND: Blastocystis, a genetically diverse intestinal parasite with controversial pathogenic potential, has increasingly been incriminated for diarrheal illness in immunocompromised individuals including colorectal cancer (CRC) patients. The aim of the current study was to assess the possible association between Blastocystis infection and CRC condition in Makkah, Saudi Arabia (KSA). METHODS: Stool samples were collected from 80 non-cancer (NC) and 138 cancer subjects including 74 CRC patients and 64 patients with other cancers outside gastrointestinal tract (COGT)...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28404232/pcr-based-molecular-characterization-of-blastocystis-hominis-subtypes-in-southwest-of-iran
#7
Shahram Khademvatan, Rahim Masjedizadeh, Ehsan Yousefi-Razin, Hamidreza Mahbodfar, Fakher Rahim, Elham Yousefi, Masoud Foroutan
Blastocystis hominis is the most common intestinal parasite found in humans and many other hosts. Pathogenicity of Blastocystis sp. remains controversial and it has been suggested that it may be associated with certain subtypes of organism. The aim of this study was to evaluate the molecular epidemiology of B. hominis and its subtype distribution in Ahvaz, southwest of Iran. During 2012-2014, a total of 481 samples were collected from patients referred to the medical laboratory centers in Ahvaz for stool examination...
April 9, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28388938/subtyping-of-blastocystis-sp-isolated-from-symptomatic-and-asymptomatic-individuals-in-makkah-saudi-arabia
#8
Raafat T Mohamed, Mohammed A El-Bali, Anhar A Mohamed, Mona A Abdel-Fatah, Mohamed A El-Malky, Nawras M Mowafy, Dina A Zaghlool, Rowaida A Bakri, Saeed A Al-Harthi
BACKGROUND: Blastocystis is a group of cosmopolitan gastrointestinal parasite of humans and a wide variety of animals. These anaerobic protozoans include more than 17 specific small-subunit ribosomal RNA subtypes, of which nine are found in humans with a variable geographical distribution. Until now, no study has described the Blastocystis subtypes present in Saudi Arabia. METHODS: In total, 1,262 faecal samples were collected from patients with gastrointestinal complaints and asymptomatic individuals visiting two major hospitals...
April 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28362138/intestinal-parasitic-infections-in-different-groups-of-immunocompromised-patients-in-kashan-and-qom-cities-central-iran
#9
Sima Rasti, Malihe Hassanzadeh, Hossein Hooshyar, Mansooreh Momen-Heravi, Seyed Gholam Abbas Mousavi, Amir Abdoli
INTRODUCTION: Intestinal parasitic infections (IPIs) are important causes of morbidity and mortality in patients with immunocompromising conditions. OBJECTIVE: The aim of this study was to determine the prevalence of IPIs in different groups of immunocompromised patients, including hemodialysis patients (HD), renal transplant recipients (RTR), cancer and HIV/AIDS patients in comparison with healthy individuals in two central cities of Iran (Kashan and Qom). METHODS: In this case-control study, the stool samples of 135 HD, 50 RTR, 60 cancer patients, 20 HIV/AIDS patients and 120 healthy subjects were tested using direct-smear, formol-ether concentration, Ziehl-Neelsen staining and Agar plate method...
June 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/28326446/blastocystis-how-do-specific-diets-and-human-gut-microbiota-affect-its-development-and-pathogenicity
#10
REVIEW
M Lepczyńska, J Białkowska, E Dzika, K Piskorz-Ogórek, J Korycińska
Blastocystis is an enteric parasite that inhabits the gastrointestinal tract of humans and many animals. This emerging parasite has a worldwide distribution. It is often identified as the most common eukaryotic organism reported in human fecal samples. This parasite is recognized and diagnosed more often than ever before. Furthermore, some strains develop resistance against currently recommended drugs, such as metronidazole; therefore, the use of natural remedies or special diets has many positive aspects that may address this problem...
March 22, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28324738/protist-evolution-stealing-genes-to-gut-it-out
#11
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
#12
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...
June 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
#13
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
#14
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
#15
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
#16
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...
April 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
#17
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
#18
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
#19
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
#20
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
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