Treating children infected with intestinal worms is one of the simplest and most cost–effective ways to improve their health.
The recommendations are intended for a wide audience, including policy-makers and their expert advisers as well as technical and programme staff at government institution
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s and organizations involved in the design, implementation and expansion of programmes to control soil-transmitted helminth infections.
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This video is part of a comprehensive medical school microbiology, immunology & infectious diseases course. Your comments on videos will be key as we iterate content.
Website last accessed on 31.03.2023
Youtube Video (Explainity)
Soil-transmitted helminths (STH) affect 1.45 billion people worldwide, and high intensity infections are associated with anemia, undernutrition and impaired cognition, particularly among children. Mathematical models suggest it may be possible to in
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terrupt the transmission of STH in a community by expanding mass drug administration (MDA) from targeted high-risk groups (primarily school-aged children and women of child-bearing age) to all community members with high coverage. The DeWorm3 Project will test the feasibility of this approach to interrupting the transmission of STH using a series of cluster randomized trials in Benin, India and Malawi. Each study area (population 80,000) will be divided into 40 clusters and randomized to community-wide or standard-of-care targeted MDA for three years. Two years following the final round of MDA, prevalence of STH will be compared between arms and transmission interruption assessed in each cluster. The DeWorm3 trials will provide stakeholders with information regarding the potential to switch from STH control to a more ambitious and sustainable strategy.
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Website last accessed on 24.03.2023
Education and information about Soil-Transmitted Helminths including Human Hookworm, Roundworm and Whipworm.
Diagnostic performance, cost-effectiveness, ease of performance, rapidity and in-field applicability of tests for Soil-transmitted helminth infections.
Background: The human helminth infections include ascariasis, trichuriasis, hookworm infections, schistosomiasis, lymphatic filariasis (LF) and onchocerciasis. It is estimated that almost 2 billion people worldwide are infected with helminths. Whils
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t the WHO treatment guidelines for helminth infections are mostly aimed at controlling morbidity, there has been a recent shift with some countries moving towards goals of disease elimination through mass drug administration, especially for LF and onchocerciasis. However, as prevalence is driven lower, treating entire populations may no longer be the most efficient or cost-effective strategy. Instead, it may be beneficial to identify individuals or demographic groups who are persistently infected, often termed as being “predisposed” to infection, and target treatment at them.
Methods: The authors searched Embase, MEDLINE, Global Health, and Web of Science for all English language, humanbased papers investigating predisposition to helminth infections published up to October 31st, 2017. The varying definitions used to describe predisposition, and the statistical tests used to determine its presence, are summarised. Evidence for predisposition is presented, stratified by helminth species, and risk factors for predisposition to infection are identified and discussed.
Results: In total, 43 papers were identified, summarising results from 34 different studies in 23 countries. Consistent evidence of predisposition to infection with certain species of human helminth was identified. Children were regularly found to experience greater predisposition to Ascaris lumbricoides, Schistosoma mansoni and S. haematobium than adults. Females were found to be more predisposed to A. lumbricoides infection than were males. Household clustering of infection was identified for A. lumbricoides, T. trichiura and S. japonicum. Ascaris lumbricoides and T. trichiura also showed evidence of familial predisposition. Whilst strong evidence for predisposition to hookworm infection was identified, findings with regards to which groups were affected were considerably more varied than for other helminth species.
Conclusion: This review has found consistent evidence of predisposition to heavy (and light) infection for certain human helminth species. However, further research is needed to identify reasons for the reported differences between demographic groups. Molecular epidemiological methods associated with whole genome sequencing to determine ‘who infects whom’ may shed more light on the factors generating predisposition.
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Soil-transmitted helminths are a group of intestinal worms that include Ascaris lumbricoides (giant roundworm), Trichuris trichiura (whipworm), and Ancylostoma spp. (A. duodenale, A. ceylanicum) and Necator americanus (hookworms). Despite the clear
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biological differences among the different species, their transmission is characterized by the same sequence of events: (i) infected individuals excrete worm eggs through their stool in soil; (ii) under optimal conditions of moisture and temperature the excreted eggs develop into infectious stages; and (iii) finally, infection occurs through oral uptake (Ascaris, Ancylostoma and Trichuris) or skin penetration (Ancylostoma and Necator) of these infectious stages (embryonated eggs and third stage larvae) that reside in the soil and/or in the environment (referring to their common name).
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Int J Hyg Environ Health. 2019 Jun; 222(5): 765–777. doi: 10.1016/j.ijheh.2019.05.004;
To develop updated estimates in response to new exposure and exposure-response data of the
burden of diarrhoea, respiratory infections, malnutrition, schistosomiasis, malaria, soil-transmitted helminth
infec
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tions and trachoma from exposure to inadequate drinking-water, sanitation and hygiene behaviours
(WASH) with a focus on low- and middle-income countries.
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A MANUAL FOR WASH IMPLEMENTERS, BOTSWANA
Sightsavers | Department for International Development | The International Trachoma Initiative | Children Without Worms | WaterAid | WASH Advocates | Center for Global Safe Water, Emory University | CARE USA
23 March 2021
The meeting addressed the last key area, that is, determining the best method or combination of diagnostic methods for a control programme for S. stercoralis infections in humans.
Dr Montresor’s presentation highlighted that while there is currently no “gold standard” for the
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diagnosis of S. stercoralis, there is a felt urgency to optimize diagnostic regimens that are currently available, and in the context of population-based testing (as opposed to individual focused diagnostics in clinical settings).
In other words, the diagnostic test(s) should have good accuracy, but we should remember that in public health we do not aim at individual diagnosis: rather, we need a tool that should help to estimate the prevalence in a population.
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Accessed on 22.04.2023
To target helminth elimination, a new consortium of research institutes, universities, not-for-profit organizations, and pharmaceutical companies have joined forces and expertise to establish a research and development pipeline for the development of anthelminthics targeti
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ng nematodes. The focus is on STH as well as onchocerciasis.
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O que as crianças devem saber sobre a esquistossomose - Banda desenhada
AGRADECIMENTO: Este documento foi produzido com o apoio financeiro da Merck Alemanha. Em 2007, a Merck estabeleceu uma parceria com a Organização Mundial da Saúde para combater a esquistossomose entre os estudantes no con
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tinente africano. Inicialmente, a Merck fará uma doação de 250 milhões de comprimidos de Cesol 600, que contém o princípio ativo praziquantel. A Merck pretende dar continuidade a esse compromisso para que essa enfermidade seja eliminada na África.
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What Children Should Know About Bilharzia; Educational Comic. ACKNOWLEDGEMENT: This document was made possible through a financial grant from Merck, Germany. In 2007, Merck entered into a partnership with the World Health Organization (WHO) to combat schistosomiasis in school children on the African
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continent. In the medium term, Merck will donate 250 million tablets of Cesol 600 containing the active ingredient praziquantel. Merck will maintain its efforts until the disease has been eliminated in Africa.
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معلومات ضرورية للأطفال
عن البلهارسيا
Bambo has bilharzia: what children should know about bilharzia. Comic book.
ACKNOWLEDGEMENT: This document was made possible through a financial grant from Merck, Germany. In 2007, Merck entered into a partnership with the World
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Health Organization (WHO) to combat schistosomiasis in school children on the African continent. In the medium term, Merck will donate 250 million tablets of Cesol 600 containing the active ingredient praziquantel. Merck will maintain its efforts until the disease has been eliminated in Africa.
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Nini watoto wanapaswa kujua kuhusu kichocho?
SHUKRANI: Maelezo haya yamewezekana kupitia msaada wa fedha kutoka kwa Merck KGaA, Ujerumani. katika mwaka 2007, Merck KGaA ilingia katika ushirikiano na Shirika la Afya Duniani (WHO) kupambana na kichocho kwa watoto wa shule katika bara la Afrika.Me
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rck ina changia vidonge milioni 200 vyaa Cesol 600 zenye kiambatano imara cha praziquantel. Merk itaendeleza juhudi yake hadi hapo maradhi yatakapotokomezwa kabisa Africa.
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REMERCIEMENTS: Ce document a été réalisé grâce au soutien financier de Merck Allemagne. En 2007, Merck a conclu un partenariat avec l’Organisation mondiale de la Santé pour lutter contre la schistosomiase chez les écoliers sur le continent africain. Dans un premier temps, Merck va faire un
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e donation de 250 millions de comprimés de Cesol 600 qui contient le principe actif, praziquantel. Merck vise à maintenir cet engagement afin que cette maladie soit éliminée en Afrique.
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This manual is intended to enable WASH practitioners
who work in Mozambique to contribute to the
reduction of WASH-preventable NTDs.
Coordinated Use of Anthelminthic Drugs in Control Interventions: a Manual for Health Professionals and Programme Managers