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https://www.readbyqxmd.com/read/28821723/structural-and-developmental-expression-of-ss-riok-2-an-rio-protein-kinase-encoding-gene-of-strongyloides-stercoralis
#1
Wei-Qiang Lei, James B Lok, Wang Yuan, Yue-Zhou Zhang, Jonathan D Stoltzfus, Robin B Gasser, Si-Yuan He, Huan Zhou, Rui Zhou, Jun-Long Zhao, Min Hu
RIO kinases are essential atypical protein kinases in diverse prokaryotic and eukaryotic organisms, playing significant roles in yeast and humans. However, little is known about their functions in parasitic nematodes. In the present study, we have isolated and characterized the full-length cDNA, gDNA and a putative promoter of a RIOK-2 protein kinase (Ss-RIOK-2) encoding gene (Ss-riok-2) from Strongyloides stercoralis, a medically important parasitic nematode (Order Rhabditida). A three-dimensional structure (3D) model of Ss-RIOK-2 was generated using the Chaetomium thermophilum RIOK-2 protein kinase (Ct-RIOK-2) crystal structure 4GYG as a template...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28820707/prevalence-of-strongyloides-stercoralis-and-other-intestinal-parasite-infections-in-school-children-in-a-rural-area-of-angola-a-cross-sectional-study
#2
María Luisa Ruíz de Alegría Aznar, Karen Colmenares, Mateu Espasa, Arancha Amor, Isabel Lopez, Arlette Ninda, Joaquina Kanjala, Domingas Guilherme, Elena Sulleiro, Begoña Barriga, Eva Gil, Fernando Salvador, Cristina Bocanegra, Teresa López, Milagros Moreno, Israel Molina
Strongyloides stercoralis is widely distributed in the tropics and subtropics. The aim of this study was to determine the prevalence of S. stercoralis and other intestinal parasites and identify the risk factors for infection with S. stercoralis in a rural area of Angola. A cross-sectional study was conducted in school-age children (SAC) in Cubal, Angola. A questionnaire collecting clinical and epidemiological variables was used, and two stool samples were collected. A concentration technique (Ritchie) and a technique for detection of larvae migration (Baermann) were performed...
July 31, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28808619/gastrointestinal-parasites-in-captive-and-free-ranging-cebus-albifrons-in-the-western-amazon-ecuador
#3
Sarah Martin-Solano, Gabriel A Carrillo-Bilbao, William Ramirez, Maritza Celi-Erazo, Marie-Claude Huynen, Bruno Levecke, Washington Benitez-Ortiz, Bertrand Losson
Currently, there is a lack of surveys that report the occurrence of gastrointestinal parasites in the white-headed capuchin monkey (Cebus albifrons). We therefore assessed the presence and richness (= number of different parasite genera) of parasites in C. albifrons in wildlife refuges (n = 11) and in a free-ranging group near a human village (n = 15) in the Ecuadorian Amazon. In the 78 samples collected (median of 3 samples per animal), we identified a total of 6 genera of gastrointestinal parasites, representing protozoa, nematodes, acanthocephalans and cestodes...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28808370/a-rare-case-of-strongyloides-hyperinfection-from-hypogammaglobulinemia
#4
Paidi Ramakrishna Reddy, Sujith M Thomas, A Rajalakshmi, Deepak Vijayan, Muraleedharan Raman
Strongyloides infection can range from asymptomatic eosinophilia to disseminated disease. Common in tropical and subtropical nations, it can lead to hyperinfection, an autoinfection increasing parasitic burden in immunocompromised. Cell-mediated immunity is important in combating parasite infection. We present a case of Strongyloides hyperinfection in hypogammaglobulinemia which was refractory to conventional treatment but responded to immunoglobulin administration with complete resolution indicating role of humoral immunity also...
July 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28793306/different-but-overlapping-populations-of-strongyloides-stercoralis-in-dogs-and-humans-dogs-as-a-possible-source-for-zoonotic-strongyloidiasis
#5
Tegegn G Jaleta, Siyu Zhou, Felix M Bemm, Fabian Schär, Virak Khieu, Sinuon Muth, Peter Odermatt, James B Lok, Adrian Streit
Strongyloidiasis is a much-neglected soil born helminthiasis caused by the nematode Strongyloides stercoralis. Human derived S. stercoralis can be maintained in dogs in the laboratory and this parasite has been reported to also occur in dogs in the wild. Some authors have considered strongyloidiasis a zoonotic disease while others have argued that the two hosts carry host specialized populations of S. stercoralis and that dogs play a minor role, if any, as a reservoir for zoonotic S. stercoralis infections of humans...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28780152/functional-genomic-exploration-reveals-that-ss-riok-1-is-essential-for-the-development-and-survival-of-strongyloides-stercoralis-larvae
#6
Wang Yuan, Huan Zhou, James B Lok, Weiqiang Lei, Siyuan He, Robin B Gasser, Rui Zhou, Rui Fang, Yanqin Zhou, Junlong Zhao, Min Hu
Protein kinase RIOK-1 is a non-ribosomal factor essential for rRNA cleavage and ribosome small subunit maturation. It is encoded in all eukaryotic organisms. The RIOK-1 encoding gene of Caenorhabditis elegans (Ce-riok-1) is expressed in the neuronal and reproductive systems in larvae and adults of this free-living nematode, and it supports larval growth and development of the adult gonad. In spite of its recognised roles in model organisms such as C. elegans, little is known about the function of this molecule in parasitic nematodes...
August 3, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28761475/the-helminths-causing-surgical-or-endoscopic-abdominal-intervention-a-review-article
#7
REVIEW
Erdal Uysal, Mehmet Dokur
BACKGROUND: Helminths sometimes require surgical or endoscopic intervention. Helminths may cause acute abdomen, mechanical intestinal obstruction, gastrointestinal hemorrhage, perforation, hepatitis, pancreatitis, and appendicitis. This study aimed to determine the surgical diseases that helminths cause and to gather, analyze the case reports, case series and original articles about this topic in literature. METHODS: This study was designed as a retrospective observational study...
April 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28759583/control-of-chronic-strongyloides-stercoralis-infection-in-an-endemic-community-may-be-possible-by-pharmacological-means-alone-results-of-a-three-year-cohort-study
#8
Russell Hays, Adrian Esterman, Robyn McDermott
OBJECTIVES: To assess the effect of treatment with ivermectin on the prevalence of S. stercoralis infection in an Australian Aboriginal population over a three year period, and to assess the validity of using a lower ELISA cut-off in diagnosis. METHODS: A three-year cohort study of 259 adult Australian Aboriginals living in a remote community in northern Australia. S stercoralis infection was diagnosed using commercial ELISA testing, and employed a lower threshold for treatment than that recommended...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28735573/chemoattractant-activity-of-tris-hydroxymethyl-aminomethane-for-brugia-pahangi-infective-third-stage-larvae
#9
Y Mitsui, K E Ureña-Tatis, Y Aoki
Urocanic acid (UCA) is known as a major chemoattractant for Strongyloides stercoralis infective third-stage larvae (L3). Since Brugia pahangi is a skin-penetrating parasitic nematode similar to S. stercoralis, UCA was expected to be a chemoattractant for B. pahangi L3. Thus, the chemoattractant activity of UCA for B. pahangi L3 was assessed. The chemotactic responses of B. pahangi L3 to UCA or acetic acid (CH3COOH) dissolved in amine solutions were assessed using an agar-plate assay. A test solution of 200 mm UCA dissolved in aqueous 270 mm tris(hydroxymethyl)aminomethane (Tris) significantly attracted B...
July 24, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28732272/screening-of-the-open-scaffolds-collection-from-compounds-australia-identifies-a-new-chemical-entity-with-anthelmintic-activities-against-different-developmental-stages-of-the-barber-s-pole-worm-and-other-parasitic-nematodes
#10
Sarah Preston, Yaqing Jiao, Jonathan B Baell, Jennifer Keiser, Simon Crawford, Anson V Koehler, Tao Wang, Moana M Simpson, Ray M Kaplan, Karla J Cowley, Kaylene J Simpson, Andreas Hofmann, Abdul Jabbar, Robin B Gasser
The discovery and development of novel anthelmintic classes is essential to sustain the control of socioeconomically important parasitic worms of humans and animals. With the aim of offering novel, lead-like scaffolds for drug discovery, Compounds Australia released the 'Open Scaffolds' collection containing 33,999 compounds, with extensive information available on the physicochemical properties of these chemicals. In the present study, we screened 14,464 prioritised compounds from the 'Open Scaffolds' collection against the exsheathed third-stage larvae (xL3s) of Haemonchus contortus using recently developed whole-organism screening assays...
May 28, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28731999/-duodenal-linphoma-asociated-to-strongyloides-stercoralis-infection-two-types-of-htlv-1-infection
#11
Julissa Guevara Miranda, Patricia Guzmán Rojas, Jorge Espinoza-Ríos, Fernando Mejía Cordero
Infection by the Human T- Lymphotropic virus I (HTLV-1) causes Adult T cell Leukemia-lymphoma (ATLL), being the duodenal involvement rare. Commonly, patients co-infected with HTLV-1 and Strongyloides stercoralis are seen due to the lack of TH2 response found on these patients. We describe a 48-year- old woman, from the jungle of Peru, with a family history of HTLV-1 infection, who presented with a History of chronic diarrhea and weight loss. HTLV-1 infection with ATLL and strongyloidiasis were diagnosed. Ivermectin treatment and chemotherapy were initiated, being stabilized, and discharged...
April 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28728589/occurrence-of-strongyloidiasis-in-privately-owned-and-sheltered-dogs-clinical-presentation-and-treatment-outcome
#12
Paola Paradies, Fabrizio Iarussi, Mariateresa Sasanelli, Antonio Capogna, Riccardo Paolo Lia, Daniele Zucca, Beatrice Greco, Cinzia Cantacessi, Domenico Otranto
BACKGROUND: The increasing number of reports of human infections by Strongyloides stercoralis from a range of European countries over the last 20 years has spurred the interest of the scientific community towards this parasite and, in particular, towards the role that infections of canine hosts may play in the epidemiology of human disease. Data on the epidemiology of canine strongyloidiasis is currently limited, most likely because of the inherent limitations of current diagnostic methods...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28722622/side-benefits-of-mass-drug-administration-for-lymphatic-filariasis-on-strongyloides-stercoralis-prevalence-on-pemba-island-tanzania
#13
Beatrice Barda, Marco Albonico, Dora Buonfrate, Shaali M Ame, Said Ali, Benjamin Speich, Jennifer Keiser
Strongyloides stercoralis, although endemic in many countries, is not included in helminth control programs. Few data are available on the prevalence and morbidity linked to this infection. We compared data from two studies conducted in 1998 and 2013 on Pemba Island, Tanzania, involving 525 and 509 schoolchildren, respectively. In 1998, the diagnostic method used was Harada Mori, whereas in 2013 diagnosis was made by both Koga agar plate and Baermann methods. The prevalence registered was 41% in 1998 and 7% in 2013...
June 19, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28721104/case-report-of-a-computerized-tomography-sign-in-strongyloides-stercoralis-infection
#14
Sandeep Yerra, Pradeep Yarra
This is a case of strongyloidiasis showing colon enhancement on a computerized tomography (CT) scan. The patient presented with chief complaints of diarrhea and abdominal pain. She gave a history of recent travel to El Salvador and her stool was positive for Strongyloides stercoralis. A CT scan revealed a circumferential enhancement of the sigmoid colon. This CT sign was unusual in strongyloidiasis and when combined with the symptoms, caused us to rule out inflammatory bowel disease and shock bowel. Stool examination revealed ova and parasites of Strongyloides stercoralis...
2017: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/28719325/serologic-monitoring-of-public-health-interventions-against-strongyloides-stercoralis
#15
Paola Vargas, Alejandro J Krolewiecki, Adriana Echazú, Marisa Juarez, Pamela Cajal, Jose F Gil, Nicolás Caro, Julio Nasser, Patrick Lammie, Rubén O Cimino
Northwestern Argentina is endemic for soil-transmitted helminths, and annual deworming programs are carried out in prioritized areas. High prevalence of Strongyloides stercoralis was reported in this area; therefore, control programs including ivermectin are being evaluated. The NIE-enzyme linked immunosorbent assay (ELISA) was used for this purpose. In this community trial, two groups of patients, classified according to housing and living conditions were evaluated. Simultaneous with baseline survey, Group 1 was moved to new households with access to improved water and sanitation facilities (W and S), where deworming (MDA, massive drug administration) took place within 1 month; whereas Group 2 received MDA but remained living with unimproved W and S...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28705595/excretory-secretory-antigens-of-strongyloides-venezuelensis-applied-to-igg-detection-in-human-strongyloidosis
#16
Renata A Cunha, Edson F G de Carvalho, José E N de Sousa, Julia M Costa-Cruz
Strongyloidosis is a neglected disease that affects millions of people around the world. The cases that particularly deserve attention are those related to hyperinfection, mainly in immunocompromised patients. In this sense, there is a need to improve the serological diagnosis of this helminth. The objective of this study was therefore to produce and characterize excretory/secretory (E/S) antigens of Strongyloides venezuelensis infective larvae (L3) for use as a heterologous antigen in the diagnosis of human strongyloidosis and other parasitic infection groups...
July 10, 2017: Parasitology International
https://www.readbyqxmd.com/read/28697818/speciation-in-the-genus-cloacina-nematoda-strongylida-species-flocks-and-intra-host-speciation
#17
N B Chilton, M A Shuttleworth, F Huby-Chilton, A V Koehler, A Jabbar, R B Gasser, I Beveridge
Sequences of the first and second internal transcribed spacers (ITS1 + ITS2) of nuclear ribosomal DNA were employed to determine whether the congeneric assemblages of species of the strongyloid nematode genus Cloacina, found in the forestomachs of individual species of kangaroos and wallabies (Marsupialia: Macropodidae), considered to represent species flocks, were monophyletic. Nematode assemblages examined in the black-striped wallaby, Macropus (Notamacropus) dorsalis, the wallaroos, Macropus (Osphranter) antilopinus/robustus, rock wallabies, Petrogale spp...
July 12, 2017: Parasitology
https://www.readbyqxmd.com/read/28692673/gastrointestinal-parasite-infections-and-self-medication-in-wild-chimpanzees-surviving-in-degraded-forest-fragments-within-an-agricultural-landscape-mosaic-in-uganda
#18
Matthew R McLennan, Hideo Hasegawa, Massimo Bardi, Michael A Huffman
Monitoring health in wild great apes is integral to their conservation and is especially important where they share habitats with humans, given the potential for zoonotic pathogen exchange. We studied the intestinal parasites of wild chimpanzees (Pan troglodytes schweinfurthii) inhabiting degraded forest fragments amid farmland and villages in Bulindi, Uganda. We first identified protozoan and helminth parasites infecting this population. Sixteen taxa were demonstrated microscopically (9 protozoa, 5 nematodes, 1 cestode, and 1 trematode)...
2017: PloS One
https://www.readbyqxmd.com/read/28691033/prevalence-of-toxoplasma-gondii-and-other-gastrointestinal-parasites-in-domestic-cats-from-households-in-thika-region-kenya
#19
Adele Nyambura Njuguna, John Maina Kagira, Simon Muturi Karanja, Maina Ngotho, Lucy Mutharia, Naomi Wangari Maina
Gastrointestinal (GIT) parasites of domestic cats (Felis catus) not only cause morbidity but are also potential zoonotic agents. The current study aimed at establishing the prevalence of GIT parasites in cats kept by households in Thika region, Kenya. Fecal samples were collected randomly from 103 cats and analyzed for presence of parasites using standard parasitological methods. In descending order, the prevalence of the detected protozoa parasites was Isospora spp. 43.7% (95% CI: 40.4-47%), Cryptosporidium spp...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28687738/a-possible-origin-population-of-pathogenic-intestinal-nematodes-strongyloides-stercoralis-unveiled-by-molecular-phylogeny
#20
Eiji Nagayasu, Myo Pa Pa Thet Hnin Htwe Aung, Thanaporn Hortiwakul, Akina Hino, Teruhisa Tanaka, Miwa Higashiarakawa, Alex Olia, Tomoyo Taniguchi, Soe Moe Thu Win, Isao Ohashi, Emmanuel Igwaro Odongo-Aginya, Khin Myo Aye, Mon Mon, Kyu Kyu Win, Kei Ota, Yukari Torisu, Siripen Panthuwong, Eisaku Kimura, Nirianne M Q Palacpac, Taisei Kikuchi, Tetsuo Hirata, Shidow Torisu, Hajime Hisaeda, Toshihiro Horii, Jiro Fujita, Wah Win Htike, Haruhiko Maruyama
Humans and dogs are the two major hosts of Strongyloides stercoralis, an intestinal parasitic nematode. To better understand the phylogenetic relationships among S. stercoralis isolates infecting humans and dogs and to assess the zoonotic potential of this parasite, we analyzed mitochondrial Cox1, nuclear 18S rDNA, 28S rDNA, and a major sperm protein domain-containing protein genes. Overall, our analyses indicated the presence of two distinct lineages of S. stercoralis (referred to as type A and type B). While type A parasites were isolated both from humans and dogs in different countries, type B parasites were found exclusively in dogs, indicating that the type B has not adapted to infect humans...
July 7, 2017: Scientific Reports
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