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Soil-transmitted helminth

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https://www.readbyqxmd.com/read/29432423/estimation-of-the-number-of-women-of-reproductive-age-in-need-of-preventive-chemotherapy-for-soil-transmitted-helminth-infections
#1
Denise Mupfasoni, Alexei Mikhailov, Pamela Mbabazi, Jonathan King, Theresa W Gyorkos, Antonio Montresor
BACKGROUND: Soil-transmitted helminth infections are among the most common infections in developing countries. Globally, as many as 2 billion people are considered to be at risk for soil-transmitted-helminth (STH) infections. Preschool children (PSAC), school-age children (SAC) and women of reproductive age (WRA) are at high risk of STH-attributable morbidity and preventive chemotherapy (PC) for STH is recommended by the World health Organization (WHO). METHODOLOGY/PRINCIPAL FINDINGS: Over the last five years, PC coverage in PSAC and SAC has gradually increased, while coverage in WRA has lagged...
February 12, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29424716/soil-transmitted-helminth-eggs-assessment-in-wastewater-in-an-urban-area-in-india
#2
Sonia Grego, Viswa Barani, Meghan Hegarty-Craver, Antony Raj, Prasanna Perumal, Adrian B Berg, Colleen Archer
Water quality and sanitation are inextricably linked to prevalence and control of soil-transmitted helminth infections, a public health concern in resource-limited settings. India bears a large burden of disease associated with poor sanitation. Transformative onsite sanitation technologies are being developed that feature elimination of pathogens including helminth eggs in wastewater treatment. We are conducting third-party testing of multiple sanitation technology systems in Coimbatore (Tamil Nadu) India. To ensure stringent testing of the pathogen removal ability of sanitation technologies, the presence of helminth eggs in wastewater across the town of Coimbatore was assessed...
February 2018: Journal of Water and Health
https://www.readbyqxmd.com/read/29414108/the-optimal-timing-of-post-treatment-sampling-for-the-assessment-of-anthelminthic-drug-efficacy-against-ascaris-infections-in-humans
#3
Bruno Levecke, Alice V Easton, Piet Cools, Marco Albonico, Shaali Ame, John S Gilleard, Jennifer Keiser, Antonio Montresor, Roger Prichard, Johnny Vlaminck, Jozef Vercruysse
The egg reduction rate (ERR) is the current standard mean to assess the efficacy of drugs against human soil-transmitted helminths (STHs; Ascaris lumbricoides, Trichuris trichiura and hookworm). Although the timing of post-treatment sampling is pivotal for a readily interpretation of drug efficacy, there is lack empirical data that allows recommending the optimal time point for a follow-up egg counting. In the present study, we re-analyzed both the kinetics of worm expulsion and egg output for Ascaris lumbricoides following a single oral dose of albendazole in a series of studies previously conducted in Kenyan communities...
January 13, 2018: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/29385138/correction-assessing-the-feasibility-of-interrupting-the-transmission-of-soil-transmitted-helminths-through-mass-drug-administration-the-deworm3-cluster-randomized-trial-protocol
#4
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pntd.0006166.].
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29382359/helminth-lifespan-interacts-with-non-compliance-in-reducing-the-effectiveness-of-anthelmintic-treatment
#5
Sam H Farrell, Roy M Anderson
BACKGROUND: The success of mass drug administration programmes targeting the soil-transmitted helminths and schistosome parasites is in part dependent on compliance to treatment at sequential rounds of mass drug administration (MDA). The impact of MDA is vulnerable to systematic non-compliance, defined as a portion of the eligible population remaining untreated over successive treatment rounds. The impact of systematic non-compliance on helminth transmission dynamics - and thereby on the number of treatment rounds required to interrupt transmission - is dependent on the parasitic helminth being targeted by MDA...
January 31, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29378644/prevalence-of-and-risk-factors-for-malaria-filariasis-and-intestinal-parasites-as-single-infections-or-co-infections-in-different-settlements-of-gabon-central-africa
#6
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
https://www.readbyqxmd.com/read/29378542/interrupting-seasonal-transmission-of-schistosoma-haematobium-and-control-of-soil-transmitted-helminthiasis-in-northern-and-central-c%C3%A3-te-d-ivoire-a-score-study-protocol
#7
Yves-Nathan T Tian-Bi, Mamadou Ouattara, Stefanie Knopp, Jean T Coulibaly, Eveline Hürlimann, Bonnie Webster, Fiona Allan, David Rollinson, Aboulaye Meïté, Nana R Diakité, Cyrille K Konan, Eliézer K N'Goran, Jürg Utzinger
BACKGROUND: To achieve a world free of schistosomiasis, the objective is to scale up control and elimination efforts in all endemic countries. Where interruption of transmission is considered feasible, countries are encouraged to implement a comprehensive intervention package, including preventive chemotherapy, information, education and communication (IEC), water, sanitation and hygiene (WASH), and snail control. In northern and central Côte d'Ivoire, transmission of Schistosoma haematobium is seasonal and elimination might be achieved...
January 29, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29370166/expanding-molecular-diagnostics-of-helminthiasis-piloting-use-of-the-gpln-platform-for-surveillance-of-soil-transmitted-helminthiasis-and-schistosomiasis-in-ghana
#8
Lucas J Cunningham, John Odoom, Deborah Pratt, Linda Boatemaa, Nana Asante-Ntim, Keren Attiku, Bismarck Banahene, Mike Osei-Atweneboana, Jaco J Verweij, David Molyneux, Russell J Stothard, Emily R Adams
The efforts to control and eradicate polio as a global health burden have been successful to the point where currently only three countries now report endemic polio, and the number of cases of polio continues to decrease. The success of the polio programme has been dependant on a well-developed network of laboratories termed the global polio laboratory network (GPLN). Here we explore collaborative opportunities with the GPLN to target two of the 18 diseases listed as a neglected tropical diseases (NTD) namely soil transmitted helminthiasis (STH) and Schistosomiasis (SCH)...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29364525/intestinal-parasites-associations-with-intestinal-and-systemic-inflammation
#9
Gerardo A Zavala, Olga P García, Mariela Camacho, Dolores Ronquillo, Maiza Campos-Ponce, Colleen Doak, Katja Polman, Jorge L Rosado
AIMS: Evaluate associations between intestinal parasitic infection with intestinal and systemic inflammatory markers in school-aged children with high rates of obesity. METHODS AND RESULTS: Plasma concentrations of CRP, leptin, TNF-α, IL-6 and IL-10 were measured as systemic inflammation markers and count of stool leukocytes as marker of intestinal inflammation in 291 children (6-10y). Intestinal parasitic infection was measured by stool examination. Logistic regression analyses were performed to determine the odds of having high inflammatory markers for each parasite or group of parasites as compared to parasite-free children while adjusting for sex, age, mother educational level and % of body fat...
January 24, 2018: Parasite Immunology
https://www.readbyqxmd.com/read/29363441/severe-strongyloidiasis-in-solid-organ-transplant-recipients-should-we-preventively-treat-the-recipient-the-donor-or-both
#10
Gilles Eperon, Jerome Tourret, Oana Ailioaie, Luc Paris, Lucile Mercadal, Julien Mayaux, Eric Caumes, Benoit Barrou
Strongyloidiasis is caused by a soil-transmitted helminth that is endemic in tropical and subtropical countries. The parasite can complete its life cycle without leaving the host, allowing autoinfection and persistence. The risk of infection in travelers is low, but the disease may become lethal following immunosuppression. In case of solid organ transplantation, the risk of donor transmission has been suspected for several years. However, the management of live donors in this context has only recently been considered, and no guidelines exist for the management of deceased donors...
January 22, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29351762/inclusion-of-edaphic-predictors-for-enhancement-of-models-to-determine-distribution-of-soil-transmitted-helminths-the-case-of-zimbabwe
#11
Nicholas Midzi, Blessing Kavhu, Portia Manangazira, Isaac Phiri, Susan L Mutambu, Cremants Tshuma, Moses J Chimbari, Shungu Munyati, Stanely M Midzi, Lincon Charimari, Anatoria Ncube, Masceline J Mutsaka-Makuvaza, White Soko, Emmanuel Madzima, Gibson Hlerema, Joel Mbedzi, Gibson Mhlanga, Mhosisi Masocha
BACKGROUND: Reliable mapping of soil-transmitted helminth (STH) parasites requires rigorous statistical and machine learning algorithms capable of integrating the combined influence of several determinants to predict distributions. This study tested whether combining edaphic predictors with relevant environmental predictors improves model performance when predicting the distribution of STH, Ascaris lumbricoides and hookworms at a national scale in Zimbabwe. METHODS: Geo-referenced parasitological data obtained from a 2010/2011 national survey indicating a confirmed presence or absence of STH among school children aged 10-15 years was used to calibrate ten species distribution models (SDMs)...
January 19, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29346440/geographical-distribution-of-soil-transmitted-helminths-and-the-effects-of-community-type-in-south-asia-and-south-east-asia-a-systematic-review
#12
Zachary A Silver, Saravanakumar P Kaliappan, Prasanna Samuel, Srinivasan Venugopal, Gagandeep Kang, Rajiv Sarkar, Sitara S R Ajjampur
BACKGROUND: Soil-transmitted helminth (STH) infections are among the most prevalent neglected tropical diseases (NTD) worldwide. Since the publication of the WHO road map to combat NTD in 2012, there has been a renewed commitment to control STH. In this study, we analysed the geographical distribution and effect of community type on prevalence of hookworm, Trichuris and Ascaris in south Asia and south east Asia. METHODOLOGY: We conducted a systematic review of open-access literature published in PubMed Central and the Global Atlas of Helminth Infection...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346412/a-comparative-analysis-of-preservation-techniques-for-the-optimal-molecular-detection-of-hookworm-dna-in-a-human-fecal-specimen
#13
Marina Papaiakovou, Nils Pilotte, Ben Baumer, Jessica Grant, Kristjana Asbjornsdottir, Fabian Schaer, Yan Hu, Raffi Aroian, Judd Walson, Steven A Williams
BACKGROUND: Proper collection and storage of fecal samples is necessary to guarantee the subsequent reliability of DNA-based soil-transmitted helminth diagnostic procedures. Previous research has examined various methods to preserve fecal samples for subsequent microscopic analysis or for subsequent determination of overall DNA yields obtained following DNA extraction. However, only limited research has focused on the preservation of soil-transmitted helminth DNA in stool samples stored at ambient temperature or maintained in a cold chain for extended periods of time...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346377/assessing-the-feasibility-of-interrupting-the-transmission-of-soil-transmitted-helminths-through-mass-drug-administration-the-deworm3-cluster-randomized-trial-protocol
#14
Kristjana Hrönn Ásbjörnsdóttir, Sitara S Rao Ajjampur, Roy M Anderson, Robin Bailey, Iain Gardiner, Katherine E Halliday, Moudachirou Ibikounle, Khumbo Kalua, Gagandeep Kang, D Timothy J Littlewood, Adrian J F Luty, Arianna Rubin Means, William Oswald, Rachel L Pullan, Rajiv Sarkar, Fabian Schär, Adam Szpiro, James E Truscott, Marleen Werkman, Elodie Yard, Judd L Walson
ClinicalTrials.gov NCT03014167.
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346376/evaluating-the-sustainability-scalability-and-replicability-of-an-sth-transmission-interruption-intervention-the-deworm3-implementation-science-protocol
#15
Arianna Rubin Means, Sitara S R Ajjampur, Robin Bailey, Katya Galactionova, Marie-Claire Gwayi-Chore, Katherine Halliday, Moudachirou Ibikounle, Sanjay Juvekar, Khumbo Kalua, Gagandeep Kang, Pallavi Lele, Adrian J F Luty, Rachel Pullan, Rajiv Sarkar, Fabian Schär, Fabrizio Tediosi, Bryan J Weiner, Elodie Yard, Judd Walson
Hybrid trials that include both clinical and implementation science outcomes are increasingly relevant for public health researchers that aim to rapidly translate study findings into evidence-based practice. The DeWorm3 Project is a series of hybrid trials testing the feasibility of interrupting the transmission of soil transmitted helminths (STH), while conducting implementation science research that contextualizes clinical research findings and provides guidance on opportunities to optimize delivery of STH interventions...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346367/assessment-of-serum-pharmacokinetics-and-urinary-excretion-of-albendazole-and-its-metabolites-in-human-volunteers
#16
Laura Ceballos, Alejandro Krolewiecki, Marisa Juárez, Laura Moreno, Fabian Schaer, Luis I Alvarez, Rubén Cimino, Judd Walson, Carlos E Lanusse
BACKGROUND: Soil Transmitted Helminth (STH) infections negatively impact physical and mental development in human populations. Current WHO guidelines recommend morbidity control of these infections through mass drug administration (MDA) using albendazole (ABZ) or mebendazole. Despite major reductions in STH associated morbidity globally, not all programs have demonstrated the expected impact on prevalence of parasite infections. These therapeutic failures may be related to poor programmatic coverage, suboptimal adherence or the exposure of parasites to sub-therapeutic drug concentrations...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29346366/testing-for-soil-transmitted-helminth-transmission-elimination-analysing-the-impact-of-the-sensitivity-of-different-diagnostic-tools
#17
Marleen Werkman, James E Wright, James E Truscott, Alice V Easton, Rita G Oliveira, Jaspreet Toor, Alison Ower, Kristjana H Ásbjörnsdóttir, Arianna R Means, Sam H Farrell, Judd L Walson, Roy M Anderson
In recent years, an increased focus has been placed upon the possibility of the elimination of soil-transmitted helminth (STH) transmission using various interventions including mass drug administration. The primary diagnostic tool recommended by the WHO is the detection of STH eggs in stool using the Kato-Katz (KK) method. However, detecting infected individuals using this method becomes increasingly difficult as the intensity of infection decreases. Newer techniques, such as qPCR, have been shown to have greater sensitivity than KK, especially at low prevalence...
January 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29336569/paper-based-dna-reader-for-visualized-quantification-of-soil-transmitted-helminth-infections
#18
Alex Guan Wang, Tianyu Dong, Hayam Mansour, Gabriela Matamoros, Ana L Sanchez, Feng Li
Soil-transmitted helminth (STH) infections are a global health issue affecting nearly one-third of the world's population. As most endemic areas of STH are impoverished countries or regions with limited healthcare resources, the accurate diagnosis of STH requires analytical tools that are not only quantitative, but also portable, inexpensive, and with no or minimal demand for external instrument. Herein, we introduce a novel paper-based diagnostic device, termed quantitative paper-based DNA reader (qPDR), capable of quantifying STH at the molecular level by measuring distance as readout, thus eliminating the need for external readers...
January 16, 2018: ACS Sensors
https://www.readbyqxmd.com/read/29329561/strongyloides-stercoralis-and-hookworm-co-infection-spatial-distribution-and-determinants-in-preah-vihear-province-cambodia
#19
Armelle Forrer, Virak Khieu, Fabian Schär, Penelope Vounatsou, Frédérique Chammartin, Hanspeter Marti, Sinuon Muth, Peter Odermatt
BACKGROUND: Strongyloides stercoralis and hookworm are two soil-transmitted helminths (STH) that are highly prevalent in Cambodia. Strongyloides stercoralis causes long-lasting infections and significant morbidity but is largely neglected, while hookworm causes the highest public health burden among STH. The two parasites have the same infection route, i.e. skin penetration. The extent of co-distribution, which could result in potential high co-morbidities, is unknown in highly endemic settings like Cambodia...
January 12, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29329288/soil-transmitted-helminth-infection-loss-of-education-and-cognitive-impairment-in-school-aged-children-a-systematic-review-and-meta-analysis
#20
Noel Pabalan, Eloisa Singian, Lani Tabangay, Hamdi Jarjanazi, Michael J Boivin, Amara E Ezeamama
BACKGROUND: Evidence of an adverse influence of soil transmitted helminth (STH) infections on cognitive function and educational loss is equivocal. Prior meta-analyses have focused on randomized controlled trials only and have not sufficiently explored the potential for disparate influence of STH infection by cognitive domain. We re-examine the hypothesis that STH infection is associated with cognitive deficit and educational loss using data from all primary epidemiologic studies published between 1992 and 2016...
January 2018: PLoS Neglected Tropical Diseases
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