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https://www.readbyqxmd.com/read/28633651/epidemiology-of-intestinal-helminthiasis-among-school-children-with-emphasis-on-schistosoma-mansoni-infection-in-wolaita-zone-southern-ethiopia
#1
Bereket Alemayehu, Zewdneh Tomass, Fiseha Wadilo, Dawit Leja, Song Liang, Berhanu Erko
BACKGROUND: Intestinal helminth infections are major parasitic diseases causing public health problems in Ethiopia. Although the epidemiology of these infections are well documented in Ethiopia, new transmission foci for schistosomiasis are being reported in different parts of the country. The objective of this study was to assess the prevalence of Schistosoma mansoni and other intestinal helminth infections among school children and determine the endemicity of schistosomiasis in Wolaita Zone, southern Ethiopia...
June 20, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28622767/praziquantel-decreases-fecundity-in-schistosoma-mansoni-adult-worms-that-survive-treatment-evidence-from-a-laboratory-life-history-trade-offs-selection-study
#2
Poppy H L Lamberton, Christina L Faust, Joanne P Webster
BACKGROUND: Mass drug administration of praziquantel is the World Health Organization's endorsed control strategy for schistosomiasis. A decade of annual treatments across sub-Saharan Africa has resulted in significant reductions of infection prevalence and intensity levels, although 'hotspots' remain. Repeated drug treatments place strong selective pressures on parasites, which may affect life-history traits that impact transmission dynamics. Understanding drug treatment responses and the evolution of such traits can help inform on how to minimise the risk of drug resistance developing, maximise sustainable control programme success, and improve diagnostic protocols...
June 16, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28622369/comparative-sequence-analysis-reveals-regulation-of-genes-in-developing-schistosomula-of-schistosoma-mansoni-exposed-to-host-portal-serum
#3
Wander de Jesus Jeremias, Flávio Marcos Gomes Araújo, Fábio Ribeiro Queiroz, Fabiano Sviatopolk Mirsky Pais, Ana Carolina Alves de Mattos, Anna Christina de Matos Salim, Paulo Marcos Zech Coelho, Guilherme Correa Oliveira, John Robert Kusel, Renata Guerra-Sá, Roney Santos Coimbra, Élio Hideo Babá
Once inside a vertebrate host after infection, individual schistosomula of the parasite Schistosoma mansoni find a new and complex environment, which requires quick adjustments for survival, such as those that allow it to avoid the innate immune response of the host. Thus, it is very important for the parasite to remain within the skin after entering the host for a period of about 3 days, at which time it can then reach the venous system, migrate to the lungs and, by the end of eighth day post-infection, it reach the portal venous system, while undergoing minimal changes in morphology...
2017: PloS One
https://www.readbyqxmd.com/read/28620259/standardization-of-dot-enzyme-linked-immmunosorbent-assay-for-the-diagnosis-of-bovine-visceral-schistosomiasis
#4
Kommu Sudhakar, G S Sreenivasa Murthy, Gaddam Rajeshwari
AIM: Bovine visceral schistosomiasis has been reported as an important disease entity as it affects animal health, productivity, causes economic losses due to liver condemnation, and produces a high morbidity. This study was conducted to standardize an easy, reliable dot-enzyme-linked immmunosorbent assay (ELISA) for the diagnosis of visceral schistosomiasis caused by Schistosoma spindale and to know the prevalence rate in and around Hyderabad. MATERIALS AND METHODS: A dot-ELISA was standardized in the laboratory using whole worm antigen (WWA) and excretory-secretory antigen (ESA) of S...
May 2017: Veterinary World
https://www.readbyqxmd.com/read/28619672/point-of-care-diagnosis-of-multiple-schistosome-parasites-species-specific-dna-detection-in-urine-by-loop-mediated-isothermal-amplification-lamp
#5
Nilanjan Lodh, Kei Mikita, Kwabena M Bosompem, William K Anyan, Joseph K Quartey, Joseph Otchere, Clive J Shiff
Schistosomes are easily transmitted and high chance of repeat infection, so if control strategies based on targeted mass drug administration (MDA) are to succeed it is essential to have a test that is sensitive, accurate and simple to use. It is known and regularly demonstrated that praziquantel does not always eliminate an infection so in spite of the successes of control programs a residual of the reservoir survives to re-infect snails. The issue of diagnostic sensitivity becomes more critical in the assessment of program effectiveness...
June 12, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28619227/efficacy-and-safety-of-praziquantel-in-preschool-aged-and-school-aged-children-infected-with-schistosoma-mansoni-a-randomised-controlled-parallel-group-dose-ranging-phase-2-trial
#6
Jean T Coulibaly, Gordana Panic, Kigbafori D Silué, Jana Kovač, Jan Hattendorf, Jennifer Keiser
BACKGROUND: Praziquantel has been the drug of choice for schistosomiasis control for more than 40 years, yet surprisingly, the optimal dose for children younger than 4 years is not known. We aimed to assess the efficacy and safety of escalating praziquantel dosages in preschool-aged children (PSAC). METHODS: We did a randomised controlled, parallel-group, single-blind, dose-ranging, phase 2 trial in PSAC (2-5 years) and school-aged children (SAC; aged 6-15 years) as a comparator group in southern Côte d'Ivoire...
July 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28619212/treatment-of-preschool-children-for-schistosomiasis
#7
Antonio Montresor, Amadou Garba
No abstract text is available yet for this article.
July 2017: Lancet Global Health
https://www.readbyqxmd.com/read/28615262/predictors-of-anemia-in-women-of-reproductive-age-biomarkers-reflecting-inflammation-and-nutritional-determinants-of-anemia-brinda-project
#8
REVIEW
James P Wirth, Bradley A Woodruff, Reina Engle-Stone, Sorrel Ml Namaste, Victor J Temple, Nicolai Petry, Barbara Macdonald, Parminder S Suchdev, Fabian Rohner, Grant J Aaron
Background: Anemia in women of reproductive age (WRA) (age range: 15-49 y) remains a public health problem globally, and reducing anemia in women by 50% by 2025 is a goal of the World Health Assembly.Objective: We assessed the associations between anemia and multiple proximal risk factors (e.g., iron and vitamin A deficiencies, inflammation, malaria, and body mass index) and distal risk factors (e.g., education status, household sanitation and hygiene, and urban or rural residence) in nonpregnant WRA.Design: Cross-sectional, nationally representative data from 10 surveys (n = 27,018) from the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project were analyzed individually and pooled by the infection burden and risk in the country...
June 14, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28602619/the-impact-of-sanitation-on-infectious-disease-and-nutritional-status-a-systematic-review-and-meta-analysis
#9
REVIEW
Matthew C Freeman, Joshua V Garn, Gloria D Sclar, Sophie Boisson, Kate Medlicott, Kelly T Alexander, Gauthami Penakalapati, Darcy Anderson, Amrita G Mahtani, Jack E T Grimes, Eva A Rehfuess, Thomas F Clasen
BACKGROUND: Sanitation aims to sequester human feces and prevent exposure to fecal pathogens. More than 2.4 billion people worldwide lack access to improved sanitation facilities and almost one billion practice open defecation. We undertook systematic reviews and meta-analyses to compile the most recent evidence on the impact of sanitation on diarrhea, soil-transmitted helminth (STH) infections, trachoma, schistosomiasis, and nutritional status assessed using anthropometry. METHODS AND FINDINGS: We updated previously published reviews by following their search strategy and eligibility criteria...
May 31, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28599669/characterization-of-schistosoma-japonicum-tetraspanning-orphan-receptor-and-its-role-in-binding-to-complement-c2-and-immunoprotection-against-murine-schistosomiasis
#10
Shuai Ma, Jinli Zai, Yanhui Han, Yang Hong, Min Zhang, Xiaodan Cao, Qian Han, Ke Lu, Zhixin Zhao, Jiaojiao Lin, Zhiqiang Fu
BACKGROUND: Schistosomiasis remains an important global public health problem, as millions of people are at risk of acquiring infection. An ideal method for sustainable control of schistosomiasis would be to develop an efficient vaccine. Schistosomes can survive in the host vascular system by immune evasion, regulating the host complement cascade. Schistosoma japonicum tetraspanning orphan receptor (SjTOR) is a complement regulator, which is a tegument membrane protein. To date there is no experimental evidence to explain the function of SjTOR...
June 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28591406/the-use-of-circulating-cathodic-antigen-rapid-test-and-serology-for-diagnosis-of-active-schistosoma-mansoni-infection-in-migrants-in-italy-a-non-endemic-country-a-cross-sectional-study
#11
Laura Infurnari, Laura Galli, Alba Bigoloni, Alessia Carbone, Stefania Chiappetta, Angelo Sala, Norberto Ceserani, Adriano Lazzarin, Antonella Castagna, Giovanni Gaiera/
Diagnosis of schistosomiasis in migrants coming from endemic areas can be difficult, especially in asymptomatic subjects. Light-intensity disease, in fact, may be missed due to the low sensitivity of the stool microscopy and serologic testing cannot distinguish between a resolved infection and an active infection in patients who have been infected and treated in the past, because specific antibodies can persist despite cure. We describe a cross-sectional study conducted on 82 migrants tested for Schistosoma mansoni on single blood (anti-schistosome antibodies, total IgE) and urine [point-of-care (POC) circulating-cathodic-antigen (CCA) test] samples...
June 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28591307/schistosomiasis-and-hepatopulmonary-syndrome-the-role-of-concomitant-liver-cirrhosis
#12
Liana Gonçalves-Macedo, Edmundo Pessoa Lopes, Ana Lucia Coutinho Domingues, Brivaldo Markman, Vitor Gomes Mota, Carlos Feitosa Luna
BACKGROUND: Hepatopulmonary syndrome (HPS) is defined as an oxygenation defect induced by intrapulmonary vasodilation in patients with liver disease or portal hypertension. It is investigated in patients with liver cirrhosis and less frequently in those with portal hypertension without liver cirrhosis, as may occur in hepatosplenic schistosomiasis (HSS). OBJECTIVES: To investigate the prevalence of HPS in patients with HSS, and to determine whether the occurrence of HPS is influenced by concomitant cirrhosis...
July 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28584726/the-south-american-distribution-and-southernmost-record-of-biomphalaria-peregrina-a-potential-intermediate-host-of-schistosomiasis
#13
Alejandra Rumi, Roberto Eugenio Vogler, Ariel Aníbal Beltramino
Schistosomiasis remains a major parasitic disease, endemic in large parts of South America. Five neotropical species of Biomphalaria have been found to act as intermediate hosts of Schistosoma mansoni in natural populations, while others have been shown to be susceptible in experimental infections, although not found infected in the field. Among these potential intermediate hosts, Biomphalaria peregrina represents the most widespread species in South America, with confirmed occurrence records from Venezuela to northern Patagonia...
2017: PeerJ
https://www.readbyqxmd.com/read/28582412/accuracy-of-parasitological-and-immunological-tests-for-the-screening-of-human-schistosomiasis-in-immigrants-and-refugees-from-african-countries-an-approach-with-latent-class-analysis
#14
Anna Beltrame, Massimo Guerriero, Andrea Angheben, Federico Gobbi, Ana Requena-Mendez, Lorenzo Zammarchi, Fabio Formenti, Francesca Perandin, Dora Buonfrate, Zeno Bisoffi
BACKGROUND: Schistosomiasis is a neglected infection affecting millions of people, mostly living in sub-Saharan Africa. Morbidity and mortality due to chronic infection are relevant, although schistosomiasis is often clinically silent. Different diagnostic tests have been implemented in order to improve screening and diagnosis, that traditionally rely on parasitological tests with low sensitivity. Aim of this study was to evaluate the accuracy of different tests for the screening of schistosomiasis in African migrants, in a non endemic setting...
June 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28581371/delayed-presentation-of-cerebral-schistosomiasis-presenting-as-a-tumor-like-brain-lesion
#15
Suradech Suthiphosuwan, Amy Lin, Andrew F Gao, David G Munoz, Julian Spears, Aditya Bharatha
Schistosomiasis is the second most common parasitic infection worldwide. North America is a nonendemic area. However, there are occasional case reports among travelers and immigrants from endemic regions. We describe a case of a 55-year-old Canadian woman who presented with first episode of seizure. Her magnetic resonance imaging scan revealed a mass-like lesion involving the left anterior temporal lobe. The lesion showed T1 hypo- and T2 hyperintense with perilesional brain edema. On post-gadolinium-enhanced T1-weighted sequence, the lesion showed multiple small nodular and linear enhancements, also called an "arborized" appearance...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28567191/prevalence-and-distribution-of-schistosoma-haematobium-infection-among-school-children-living-in-southwestern-shores-of-lake-malawi
#16
Sekeleghe Kayuni, Rosanna Peeling, Peter Makaula
BACKGROUND: The prevalence of Schistosoma haematobium infection has been shown to be about 23.7% among children living in the lakeshore areas of Malawi, with reinfection rates of about 30% to 40%. This study aimed to determine the current prevalence and distribution of S. haematobium infection in school children along the southwestern shores of Lake Malawi and examine the control interventions present in the area. METHODS: This prospective cross-sectional study was conducted in primary schools...
March 2017: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/28555642/tgf-%C3%AE-activation-by-bone-marrow-derived-thrombospondin-1-causes-schistosoma-and-hypoxia-induced-pulmonary-hypertension
#17
Rahul Kumar, Claudia Mickael, Biruk Kassa, Liya Gebreab, Jeffrey C Robinson, Daniel E Koyanagi, Linda Sanders, Lea Barthel, Christina Meadows, Daniel Fox, David Irwin, Min Li, B Alexandre McKeon, Suzette Riddle, R Dale Brown, Leslie E Morgan, Christopher M Evans, Daniel Hernandez-Saavedra, Angela Bandeira, James P Maloney, Todd M Bull, William J Janssen, Kurt R Stenmark, Rubin M Tuder, Brian B Graham
Pulmonary arterial hypertension (PAH) is an obstructive disease of the precapillary pulmonary arteries. Schistosomiasis-associated PAH shares altered vascular TGF-β signalling with idiopathic, heritable and autoimmune-associated etiologies; moreover, TGF-β blockade can prevent experimental pulmonary hypertension (PH) in pre-clinical models. TGF-β is regulated at the level of activation, but how TGF-β is activated in this disease is unknown. Here we show TGF-β activation by thrombospondin-1 (TSP-1) is both required and sufficient for the development of PH in Schistosoma-exposed mice...
May 30, 2017: Nature Communications
https://www.readbyqxmd.com/read/28555471/comparison-of-the-spatial-patterns-of-schistosomiasis-in-zimbabwe-at-two-points-in-time-spaced-twenty-nine-years-apart-is-climate-variability-of-importance
#18
Ulrik B Pedersen, Dimitrios-Alexios Karagiannis-Voules, Nicholas Midzi, Tkafira Mduluza, Samson Mukaratirwa, Rasmus Fensholt, Birgitte J Vennervald, Thomas K Kristensen, Penelope Vounatsou, Anna-Sofie Stensgaard
Temperature, precipitation and humidity are known to be important factors for the development of schistosome parasites as well as their intermediate snail hosts. Climate therefore plays an important role in determining the geographical distribution of schistosomiasis and it is expected that climate change will alter distribution and transmission patterns. Reliable predictions of distribution changes and likely transmission scenarios are key to efficient schistosomiasis intervention-planning. However, it is often difficult to assess the direction and magnitude of the impact on schistosomiasis induced by climate change, as well as the temporal transferability and predictive accuracy of the models, as prevalence data is often only available from one point in time...
May 8, 2017: Geospatial Health
https://www.readbyqxmd.com/read/28555470/spatio-temporal-dynamics-of-schistosomiasis-in-rwanda-between-2001-and-2012-impact-of-the-national-neglected-tropical-disease-control-programme
#19
Elias Nyandwi, Tom Veldkamp, Frank Badu Osei, Sherif Amer
Schistosomiasis is recognised as a major public health problem in Rwanda. We aimed to identify the spatio-temporal dynamics of its distribution at a fine-scale spatial resolution and to explore the impact of control programme interventions. Incidence data of Schistosoma mansoni infection at 367 health facilities were obtained for the period 2001-2012. Disease cluster analyses were conducted using spatial scan statistics and geographic information systems. The impact of control interventions was assessed for three distinct sub-periods...
May 8, 2017: Geospatial Health
https://www.readbyqxmd.com/read/28552961/optimising-cluster-survey-design-for-planning-schistosomiasis-preventive-chemotherapy
#20
Sarah C L Knowles, Hugh J W Sturrock, Hugo Turner, Jane M Whitton, Charlotte M Gower, Samuel Jemu, Anna E Phillips, Aboulaye Meite, Brent Thomas, Karsor Kollie, Catherine Thomas, Maria P Rebollo, Ben Styles, Michelle Clements, Alan Fenwick, Wendy E Harrison, Fiona M Fleming
BACKGROUND: The cornerstone of current schistosomiasis control programmes is delivery of praziquantel to at-risk populations. Such preventive chemotherapy requires accurate information on the geographic distribution of infection, yet the performance of alternative survey designs for estimating prevalence and converting this into treatment decisions has not been thoroughly evaluated. METHODOLOGY/PRINCIPAL FINDINGS: We used baseline schistosomiasis mapping surveys from three countries (Malawi, Côte d'Ivoire and Liberia) to generate spatially realistic gold standard datasets, against which we tested alternative two-stage cluster survey designs...
May 2017: PLoS Neglected Tropical Diseases
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