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Strongyloides stercoralis

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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
#1
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 9, 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
#2
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/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
#3
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
#4
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/28731999/-duodenal-linphoma-asociated-to-strongyloides-stercoralis-infection-two-types-of-htlv-1-infection
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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/28691033/prevalence-of-toxoplasma-gondii-and-other-gastrointestinal-parasites-in-domestic-cats-from-households-in-thika-region-kenya
#11
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
#12
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
https://www.readbyqxmd.com/read/28676845/th2-1-hybrid-cells-occurring-in-murine-and-human-strongyloidiasis-share-effector-functions-of-th1-cells
#13
Cristin N Bock, Subash Babu, Minka Breloer, Anuradha Rajamanickam, Yukhti Boothra, Marie-Luise Brunn, Anja A Kühl, Roswitha Merle, Max Löhning, Susanne Hartmann, Sebastian Rausch
Infections by the soil-transmitted threadworm Strongyloides stercoralis affect 30-100 million people worldwide, predominantly in tropic and sub-tropic regions. Here we assessed the T helper cell phenotypes in threadworm-infected patients and experimental murine infections with focus on CD4(+) T cells co-expressing markers of Th2 and Th1 differentiation. We show that mice infected with the close relative S. ratti generate strong Th2 responses characterized by the expansion of CD4(+) GATA-3(+) cells expressing IL-4/-5/-13 in blood, spleen, gut-draining lymph nodes, lung and gut tissue...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28655989/strongyloides-stercoralis-infection-an-exotic-cause-of-chronic-diarrhea
#14
Dimitrios S Politis, Eleni Triantafyllidi, Konstantinos H Katsanos, Dimitrios K Christodoulou
No abstract text is available yet for this article.
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28651833/severe-intestinal-obstruction-due-to-strongyloides-stercoralis-in-a-pregnant-woman
#15
A Malézieux-Picard, M C Saint-Paul, J Dellamonica, J Courjon, N Tieulié, P Marty, J G Fuzibet, R Collomp, J A Marinho, V Queyrel
No abstract text is available yet for this article.
June 23, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28641722/novel-findings-in-hiv-immune-reconstitution-disease-and-strongyloides-stercoralis-infection
#16
REVIEW
Roberto G Aru, Benjamin M Chilcutt, Saira Butt, Richard D deShazo
We report the successful treatment of an HIV-infected patient with progressive strongyloidiasis as a component of immune reconstitution disease and a review of the literature on this topic. In our experience, pre- and post-antiretroviral therapy intestinal biopsies support a novel mechanism of immune reconstitution disease to Strongyloides stercoralis. We conclude that extended, dual antihelminthic therapy and temporary discontinuation of antiretroviral therapy may be effective in similar patients.
June 2017: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/28618740/screening-of-immunocompromised-patients-at-risk-of-strongyloidiasis-in-western-turkey-using-elisa-and-real-time-pcr
#17
Esra Erdem Kivrak, Esra Atalay Şahar, Hüseyin Can, Mert Döşkaya, Mümtaz Yilmaz, Hüsnü Pullukçu, Ayşe Caner, Hüseyin Töz, Adnan Yüksel Gürüz, Meltem Işikgöz Taşbakan
BACKGROUND/AIM: Strongyloides stercoralis causes life-threatening hyperinfection or disseminated strongyloidiasis in immunocompromised patients such as HIV-positive, organ transplantation, and cancer patients. This study investigated the presence of strongyloidiasis in immunocompromised patients for the first time in Turkey. MATERIALS AND METHODS: Serum and stool samples were collected from 108 patients (25.9% of them were chronic renal failure and 74.1% were renal transplantation patients) who were admitted to Ege University Medical School in İzmir, located in western Turkey...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28614685/strongyloides-stercoralis-hyperinfection
#18
Heidi H McDonald, Milton Moore
A 47-year-old man who had lived in Laos and was taking prednisone for dermatomyositis presented with a 4-day history of abdominal pain, fever, melena, and hemoptysis and a 2-week history of rash. One month before presentation, he had been hospitalized and treated with high-dose glucocorticoids for..
June 15, 2017: New England Journal of Medicine
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
#19
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/28598404/validation-of-dess-as-a-dna-preservation-method-for-the-detection-of-strongyloides-spp-in-canine-feces
#20
Meruyert Beknazarova, Shelby Millsteed, Gemma Robertson, Harriet Whiley, Kirstin Ross
Strongyloides stercoralis is a gastrointestinal parasitic nematode with a life cycle that includes free-living and parasitic forms. For both clinical (diagnostic) and environmental evaluation, it is important that we can detect Strongyloides spp. in both human and non-human fecal samples. Real-time PCR is the most feasible method for detecting the parasite in both clinical and environmental samples that have been preserved. However, one of the biggest challenges with PCR detection is DNA degradation during the postage time from rural and remote areas to the laboratory...
June 9, 2017: International Journal of Environmental Research and Public Health
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