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Jiang Long-Zhi
OBJECTIVE: To understand the current status of key parasitic diseases in Tongcheng City, so as to provide an epidemiological reference for formulating the scientific planning for "13th Five-year" parasitic diseases prevention and control. METHODS: The villages of different levels in Tongcheng City were sampled to investigate the infection of parasitic diseases of residents aged three or more years. Soil-transmitted nemathelminth, intestinal protozoa and Enterobius vermicularis were investigated by the Kato-Katz technique (a fecal sample seized two), iodine smear method and cellophane tape method, respectively...
October 24, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Pisit Suntaravitun, Amornrat Dokmaikaw
Intestinal parasitic infections remain a major public health problem in many parts of Thailand, particularly in rural areas. This study aimed to determine the prevalence of intestinal parasitic infections and associated risk factors among the people living in Huai Sai sub-district, Bang Khla district, Chachoengsao Province, central Thailand. A cross-sectional survey was carried out from June 2017 to August 2017 which included a total of 224 participants. Stool samples were examined using a simple direct smear and formalin ethyl acetate concentration technique...
February 2018: Korean Journal of Parasitology
Carolina Valença Barbosa, Magali Muniz Barreto, Rosemary de Jesus Andrade, Fernando Sodré, Claudia Masini d'Avila-Levy, José Mauro Peralta, Ricardo Pereira Igreja, Heloisa Werneck de Macedo, Helena Lucia Carneiro Santos
BACKGROUND: Intestinal parasitic infections are considered a serious public health problem and widely distributed worldwide, mainly in urban and rural environments of tropical and subtropical countries. Globally, soil-transmitted helminths and protozoa are the most common intestinal parasites. Blastocystis sp. is a highly prevalent suspected pathogenic protozoan, and considered an unusual protist due to its significant genetic diversity and host plasticity. METHODOLOGY/MAIN FINDINGS: A total of 294 stool samples were collected from inhabitants of three rural valleys in Rio de Janeiro, Brazil...
2018: PloS One
Maria Cristina Angelici, Chiara Nardis, Riccardo Scarpelli, Paola Ade
In the reported case, a 41-year-old Italian man came to the clinician's observation reporting cramps, bloating and watery diarrhoea a few days after drinking water indicated as unpotable from a fountain in a farm area. The medical suspicion was directed at both gluten intolerance and enteric infection, eventually of waterborne origin. Gluten intolerance was investigated by intestinal biopsy and excluded, while stool analyses ruled out infective bacteriological or viral agents and parasites. Subsequently, a persistent eosinophilia was revealed and a parasitological analysis was again suggested, planning for a more sensitive molecular method...
March 2, 2018: New Microbiologica
Anahita Razavi Piranshahi, Mehdi Tavalla, Shahram Khademvatan
Blastocystis hominis ( B. hominis ) is a protozoan zoonosis which clinical signs of infection with this parasite has been reported to be more severe in patients with weakened immune systems than healthy controls. So, the aim of the study was to evaluate genomic analysis of B. hominis isolates obtained from patients with HIV-positive using locus SSU-rDNA. At first, 268 stool samples were randomly collected from patients with HIV-positive referred to health centers of Khuzestan province, southwest of Iran. Formol-ether and direct smear techniques were used for the detection of parasitic agents...
March 2018: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
Zhang Ya-Lan, Zhu Yan-Kun, Chen Wei-Qi, Deng Yan, Lin Xi-Meng, Li Peng, Zhang Hong-Wei
OBJECTIVE: To understand the epidemic status of principal human parasitosis in the ecological region of Huaiyang hills of Henan Province. METHODS: According to the scheme of The 3rd National Survey of Principal Human Parasites made by National Institute of Parasitic Diseases, the survey was performed based on the ecological regions. The stratified cluster sampling was made combined with the economic and geographical conditions. The infections of intestinal helminths and protozoans in permanent residents were respectively detected by Kato-Kats technique and iodine solution...
July 24, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
C Ocaña-Losada, J A Cuenca-Gómez, M T Cabezas-Fernández, J Vázquez-Villegas, M J Soriano-Pérez, I Cabeza-Barrera, J Salas-Coronas
OBJECTIVES: Blastocystis hominis (B. hominis) is one of the most common intestinal parasites isolated in humans. The parasite can cause gastrointestinal symptoms or, in most cases, remain asymptomatic. There are issues concerning the parasite's pathogenic character. The aim of this study was to analyse the clinical and epidemiological characteristics of the parasite infection by B. hominis, with or without other parasitic co-infections. PATIENTS AND METHODS: An observational retrospective study was conducted of B...
February 15, 2018: Revista Clínica Española
Wen Chao Li, Kai Wang, Youfang Gu
BACKGROUND: Global data regarding the molecular epidemiology of Blastocystis sp. and Pentatrichomonas hominis in sheep and goats are sparse. China has one of the largest sheep and goat populations in the world. In this study we investigated the occurrence of Blastocystis sp. and P. hominis in domestic sheep and goats in China, and analyzed the genetic characterization of these two parasite species. METHODS: In total, we collected fresh fecal samples from 832 sheep and 781 goats located on seven and ten farms, respectively, in the central eastern region of China...
February 17, 2018: Parasites & Vectors
J Yakoob, Z Abbas, R Khan, K Tariq, S Awan, M A Beg
Introduction An association of Helicobacter pylori and common protozoal parasites in patients with abdominal discomfort and chronic diarrhoea is unclear and may be pathological. Materials and methods One hundred and sixty-one patients with diarrhoea were compared to 114 age and sex matched controls. Stool samples were examined by microscopy and DNA extracted for PCR with specific primers for H. pylori and protozoal parasites Blastocystis sp., Entamoeba sp. (Entamoeba histolytica, Entamoeba dispar and Entamoeba moshkovskii) and Giardia duodenalis (G...
February 16, 2018: British Journal of Biomedical Science
Djursun Karasartova, Ayse Semra Gureser, Emrah Ruh, Buse Turegun-Atasoy, Mustafa Kerem Calgin, Leyla Tasci, Aysegul Taylan-Ozkan
Polymerase chain reaction (PCR) is an effective technique for diagnosis of Blastocystis infection. Notably, DNA isolation procedure is extremely critical for the PCR step. In the present study, a recently described extraction procedure, named as the "sand method" was modified and adapted for isolation of Blastocystis DNA. To evaluate its efficacy, the current method and QIAamp DNA Stool Mini Kit (Qiagen) were applied to fresh human stool samples. Our results indicated that, the mean DNA concentrations obtained by the sand method and the commercial kit were 48 and 55 ng/μl, respectively...
February 10, 2018: Experimental Parasitology
P D Scanlan, C J Hill, R P Ross, C A Ryan, C Stanton, P D Cotter
Research into the gut microbiota of human infants is necessary in order to better understand how inter-species interactions and ecological succession shape the diversity of the gut microbiota, and in turn, how the specific composition of the gut microbiota impacts on host health both during infancy and in later years. Blastocystis is a ubiquitous intestinal protist that has been linked to a number of intestinal and extra-intestinal diseases. However, emerging data show that asymptomatic carriage is common and that Blastocystis is prevalent in the healthy adult gut microbiota...
February 5, 2018: Parasitology
Ibrahim Hamad, Rita Abou Abdallah, Isabelle Ravaux, Saadia Mokhtari, Hervé Tissot-Dupont, Caroline Michelle, Andreas Stein, Jean-Christophe Lagier, Didier Raoult, Fadi Bittar
Research on the relationship between changes in the gut microbiota and human disease, including AIDS, is a growing field. However, studies on the eukaryotic component of the intestinal microbiota have just begun and have not yet been conducted in HIV-infected patients. Moreover, eukaryotic community profiling is influenced by the use of different methodologies at each step of culture-independent techniques. Herein, initially, four DNA extraction protocols were compared to test the efficiency of each method in recovering eukaryotic DNA from fecal samples...
2018: PloS One
Noé Patrick M'bondoukwé, Eric Kendjo, Denise Patricia Mawili-Mboumba, Jeanne Vanessa Koumba Lengongo, Christelle Offouga Mbouoronde, Dieudonné Nkoghe, Fousseyni Touré, Marielle Karine Bouyou-Akotet
BACKGROUND: Malaria, filariasis, and intestinal parasitic infections (IPIs) are common and frequently overlap in developing countries. The prevalence and predictors of these infections were investigated in three different settlements (rural, semi-urban, and urban) of Gabon. METHODS: During cross-sectional surveys performed from September 2013 to June 2014, 451 individuals were interviewed. In addition, blood and stool samples were analysed for the presence of Plasmodium, filarial roundworm, intestinal protozoan, and helminth infections...
January 30, 2018: Infectious Diseases of Poverty
Elena Dacal, José M Saugar, Aida de Lucio, Marta Hernández-de-Mingo, Elena Robinson, Pamela C Köster, María L Aznar-Ruiz-de-Alegría, Mateu Espasa, Arlette Ninda, Javier Gandasegui, Elena Sulleiro, Milagros Moreno, Fernando Salvador, Israel Molina, Esperanza Rodríguez, David Carmena
BACKGROUND: Human infections by the gastrointestinal helminth Strongyloides stercoralis and the enteric protozoans Giardia duodenalis, Cryptosporidium spp. and Blastocystis spp. are not formally included in the list of 20 neglected tropical diseases prioritised by the World Health Organization. Although largely underdiagnosed and considered of lower public health relevance, these infections have been increasingly demonstrated to cause significant morbidity and even mortality globally, particularly among children living in resource-poor settings...
January 29, 2018: Parasites & Vectors
Buravej Assavapongpaiboon, Uthaitip Bunkasem, Vivornpun Sanprasert, Surang Nuchprayoon
Intestinal parasitic infection rate among school-aged children in Thailand has been decreasing. However, certain intestinal parasites remain problematic in some regions. This cross-sectional study was conducted between February and September 2016 in three suburban government primary schools (KK, BR, and HK), Saraburi, Thailand. Stool was collected from 263 asymptomatic subjects (4-15 years old), using simple direct smear, formalin-ether concentration, Boeck and Drbohlav's Locke-Egg-Serum (LES) medium culture, and agar plate culture...
January 22, 2018: American Journal of Tropical Medicine and Hygiene
Emma L Betts, Eleni Gentekaki, Adele Thomasz, Vicki Breakell, Angus I Carpenter, Anastasios D Tsaousis
Blastocystis is an anaerobic protist, commonly inhabiting the intestinal tract of both humans and other animals. Blastocystis is extremely diverse comprising 17 genetically distinct subtypes in mammals and birds. Pathogenicity of this enteric microbe is currently disputed and knowledge regarding its distribution, diversity and zoonotic potential is fragmentary. Most research has focused on Blastocystis from primates, while sampling from other animals remains limited. Herein, we investigated the prevalence and distribution of Blastocystis in animals held within a conservation park in South East England...
January 17, 2018: Parasitology
Rüdiger Hauck
Except for the important role coccidia have as predisposing factors of necrotic enteritis, the role parasites play in the dynamics of a healthy microbiota of chickens is not well explored. This review describes the interactions of relevant intestinal parasites of chickens with bacteria. Infection with Eimeria spp. favor the growth of Clostridium perfringens and suppress the growth of many other bacteria by increasing viscosity and passage time of the ingesta, and by causing lesions to the intestinal mucosa that improve the availability of nutrients for C...
December 2017: Avian Diseases
Mehrgan Heydari-Hengami, Yaghoob Hamedi, Majid Najafi-Asl, Khojasteh Sharifi-Sarasiabi
Background: Food handlers play a significant role in the dissemination and transmission of enteropathogenic microorganisms, including intestinal parasites. The aim of this study was to determine the prevalence of intestinal parasites in food handlers of Bandar Abbas, southern Iran. Methods: In this cross-sectional study, 800 stool samples were randomly collected in a period of 6 months from Jun to Nov 2015. The diagnosis was made on direct wet mount, formalin-ether concentration, Ziehl-Neelsen, and Trichrome stained slides...
January 2018: Iranian Journal of Public Health
Funda Sankur, Seniz Ayturan, Erdogan Malatyali, Hatice Ertabaklar, Sema Ertug
Background: Blastocystis is a common protozoon that inhabits human intestinal tract and has a worldwide distribution. This study aimed to determine subtype (ST) distribution of Blastocystis among school-aged children in a western city of Turkey between Mar and Jun 2014. Methods: This cross-sectional study was conducted among primary school children in Mugla between Mar and Jun 2014. Overall, 468 stool samples from children were examined by direct microscopy and inoculated into Jones medium...
October 2017: Iranian Journal of Parasitology
Zeynep Koloren, Berivan Basak Gulabi, Panagiotis Karanis
The aim of this study was to identify the subtypes of Blastocystis sp. and complete a phylogenetic analysis of 268 water samples that were collected from the Samsun, Amasya and Sinop Provinces of the Black Sea in Turkey, between the years 2011 and 2014. Blastocystis sp. was investigated in 48 uncultured sea water samples that were collected from 4 sites within the Sinop Province. A total of 100 river water samples were collected from 37 sites in the Samsun Province and 120 river water samples were collected from 10 sampling sites within the Amasya Province...
April 2018: Acta Tropica
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