Toolbox NTDs

Direction:

Standard operating procedures for supply chain management of health products for neglected tropical diseases amenable to preventive chemotherapy
recommended

World Health Organization World Health Organization WHO (2022) C_WHO

Tis first edition describes the standard operating procedures for health products for NTDs amenable to preventive chemotherapy and the medicines donated to treat them. These include albendazole for lymphatic filariasis and soil-transmitted helminthiases; azithromycin for trachoma and yaws; diethylca ... more

External Link

Soil-transmitted helminthiases (STH)

World Health Organization World Health Organization WHO (2022) C_WHO

Soil-transmitted helminth (STH) infections are among the most common infections worldwide and affect the poorest and most deprived communities. They are transmitted by eggs present in human faeces which in turn contaminate soil in areas where sanitation is poor.

External Link

Stunting as a Risk Factor of Soil-Transmitted Helminthiasis in Children: A Literature Review

Fauziah, N.; Ar-Rizqi, M.A.; Hana, S. Interdisciplinary Perspectives on Infectious Diseases (2022) CC

As a high-burden neglected tropical disease, soil-transmitted helminth (STH) infections remain a major problem in the world, especially among children under five years of age. Since young children are at high risk of being infected, STH infection can have a long-term negative impact on their life, i ... more

External Link

Estimating the population at risk with soil transmitted helminthiasis and annual drug requirements for preventive chemotherapy in Ogun State, Nigeria

Mogaji H.O., Johnson O.O. , Adigun A.B. et al Nature (2022) C2

Soil transmitted helminth (STH) infections are among the most common human infections worldwide with over 1 billion people affected. Many estimates of STH infection are often based on school-aged children (SAC). This study produced predictive risk-maps of STH on a more finite scale, estimated the nu ... mber of people infected, and the amount of drug required for preventive chemotherapy (PC) in Ogun state, Nigeria. Georeferenced STH infection data obtained from a cross-sectional survey at 33 locations between July 2016 and November 2018, together with remotely-sensed environmental and socio-economic data were analyzed using Bayesian geostatistical modelling. Stepwise variable selection procedure was employed to select a parsimonious set of predictors to predict risk and spatial distribution of STH infections. The number of persons (pre-school ages children, SAC and adults) infected with STH were estimated, with the amount of tablets needed for preventive chemotherapy. An overall prevalence of 17.2% (95% CI 14.9, 19.5) was recorded for any STH infection. Ascaris lumbricoides infections was the most predominant, with an overall prevalence of 13.6% (95% CI 11.5, 15.7), while Hookworm and Trichuris trichiura had overall prevalence of 4.6% (95% CI 3.3, 5.9) and 1.7% (95% CI 0.9, 2.4), respectively. The model-based prevalence predictions ranged from 5.0 to 23.8% for Ascaris lumbricoides, from 2.0 to 14.5% for hookworms, and from 0.1 to 5.7% for Trichuris trichiura across the implementation units. The predictive maps revealed a spatial pattern of high risk in the central, western and on the border of Republic of Benin. The model identified soil pH, soil moisture and elevation as the main predictors of infection for A. lumbricoides, Hookworms and T. trichiura respectively. About 50% (10/20) of the implementation units require biannual rounds of mass drug administration. Approximately, a total of 1.1 million persons were infected and require 7.8 million doses. However, a sub-total of 375,374 SAC were estimated to be infected, requiring 2.7 million doses. Our predictive risk maps and estimated PC needs provide useful information for the elimination of STH, either for resource acquisition or identifying priority areas for delivery of interventions in Ogun State, Nigeria. more

External Link

Diagnostic Techniques for Soil-Transmitted Helminths – Recent Advances

Khurana S., Singh S. Dovepress (2021) C2

Diagnostic performance, cost-effectiveness, ease of performance, rapidity and in-field applicability of tests for Soil-transmitted helminth infections.

External Link

Deworming: A Necessary Process for Children and Adults

Hanini, P. Alpro Pharmacy Malaysia (2020) C2

Worm infestation is a common issue that is seen mostly among children. However, this issue can be found among adults as well due to the change in lifestyle patterns. In most cases, worm infestation is not a life-threatening infection but it can lead to various clinical problems.

Download

View PDF

Pranchas para o diagnóstico de parasitos intestinais

Pan American Health Organisation PAHO (2020) C_WHO

estas Pranchas para o diagnóstico de parasitos intestinais destinam-se a servir tanto como orientação para profissionais de laboratório e de campo em países endêmicos quanto como material de ensino para estudantes e estagiários. Contêm orientações sobre a escolha da preparação para os ... more

Download

View PDF

Medios auxiliares para el diagnóstico de las parasitosis intestinales
recommended

Pan American Health Organisation PAHO (2020) C_WHO

Esta segunda edición de Medios auxiliares para el diagnóstico de las parasitosis intestinales tienen por objeto servir tanto de manual dirigido a los trabajadores de laboratorio y sobre el terreno en países con endemicidad, como de material didáctico para los estudiantes y las personas en formac ... more

External Link

Soil-Transmitted Helminthiasis in Children from a Rural Community Taking Part in a Periodic Deworming Program in the Peruvian Amazon

Errea, R.; Vasquez-Rios, G.; Calderon, M.; The American Jornal of Tropical Medicine and Hygiene (2019) CC

Infections by the soil-transmitted helminths (STH), including Ascaris lumbricoides, Trichuris trichiura, Ancylostoma duodenale/Necator americanus (hookworms), and Strongyloides stercoralis, disproportionately affect children around the world. Because of their transmission associated with poor sanita ... more

External Link

Teacher Toolkit for Urogenital Schistosomiasis
recommended

Person, B., and the Zanzibar Behaviour Change Team (2019) CC

he materials in this toolkit were developed as part of the Zanzibar Elimination of Schistosomiasis (ZEST) study. They were designed to help teachers work with students to reduce schistosomiasis in their communities and have been amended so they can be used in different communities across Africa. All ... more

Download

View PDF

Guidelines for laboratory and field testing of molluscicides for control of schistosomiasis

World Health Organization World Health Organization WHO (2019) C_WHO

This document provides up-to-date guidance on laboratory studies as well as smallscale (semi-field) and large-scale field trials to assess the efficacy and determine field application rates of new molluscicide products for control of schistosomiasis.

Download

View PDF

Bench aids for the diagnosis of intestinal parasites 2nd edition
recommended

World Health Organization World Health Organization WHO (2019) C_WHO

2nd edition

External Link

Elimination of soil-transmitted helminthiasis infection in Bangladesh: Knowledge, attitudes, and practices regarding mass drug administration

Tilak C.N., Retna S.P., Mohammad S.A. et al (2018) C2

Background: Despite several cycles of Mass Drug Administration (MDA), however, the prevalence of Soil-transmitted helminthiasis (STH) remains high in Bangladesh. A clear understanding of local knowledge, attitudes, and practices (KAP) related to the acceptance and utilization of MDA is critical for ... more

Download

View PDF

Assessing the feasibility of interrupting the transmission of soil-transmitted helminths through mass drug administration: The DeWorm3 cluster randomized trial protocol

Ásbjörnsdóttir K.H., Ajjampur S.S.R., Anderson R.M. et al (2018) C2

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 interrupt the transmission of STH in a community by e ... more

External Link

Current epidemiological evidence for predisposition to high or low intensity human helminth infection: a systematic review

Wright J.E., Werkman M., Dunn J.C. et al Parasites and Vectors (2018) C2

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. Whilst the WHO treatment guidelines for helminth infecti ... ons 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. more