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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

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Africa’s Health Financing in a New Era

Africa Centres for Disease Control and Prevention (Africa CDC) (2025) CC

Africa’s health sector is facing an unprecedented financing crisis, driven by a sharp decline of 70% in Official Development Assistance (ODA) from 2021 to 2025 and deep-rooted structural vulnerabilities. This collapse is placing immense pressure on Africa’s already fragile health systems as ODA ...is seen as the backbone of critical health programs: pandemic preparedness, maternal and child health services, disease control programs are all at risk, threatening Sustainable Development Goal 3 and Universal Health Coverage. Compounding this is Africa’s spiraling debt, with countries expected to service USD 81 billion by 2025—surpassing anticipated external financing inflows—further eroding fiscal space for health investments. Level of domestic resources is low. TThe Abuja Declaration of 2001, a pivotal commitment made by African Union (AU) member states, aimed to reverse this trend by pledging to allocate at least 15% of national budgets to the health sector. However, more than two decades later, only three countries—Rwanda, Botswana, and Cabo Verde—have consistently met or exceeded this target (WHO, 2023). In contrast, over 30 AU member states remain well below the 10% benchmark, with some allocating as little as 5–7% of their national budgets to health. In addition, only 16 (29%) of African countries currently have updated versions of National Health Development Plan (NHDP) supported by a National Health Financing Plan (NHFP). These two documents play a critical role in driving internal resource mobilisation. At the same time, public health emergencies are surging, rising 41%—from 152 in 2022 to 213 in 2024—exposing severe under-resourcing of health infrastructure and workforce. Recurring outbreaks (Mpox, Ebola, cholera, measles, Marburg…) alongside effects of climate change and humanitarian crises in Eastern DRC, the Sahel, and Sudan, are overwhelming systems stretched by chronic underfunding. The situation is worsened by Africa’s heavy dependency with over 90% of vaccines, medicines, and diagnostics being externally sourced—leaving countries vulnerable to global supply chain shocks. Health worker shortages persist, with only 2.3 professionals per 1,000 people (below the WHO’s recommended 4.45), and fewer than 30% of systems are digitized, undermining disease surveillance and early warning. Without decisive action, Africa CDC projects the continent could reverse two decades of health progress, face 2 to 4 million additional preventable deaths annually, and a heightened risk of a pandemic emerging from within. Furthermore, 39 million more Africans could be pushed into poverty by 2030 due to intertwined health and economic shocks. This is not just a sectoral crisis—it is an existential threat to Africa’s political, social, and economic resilience, and global stability. In response, African leaders, under Africa CDC’s stewardship, are advancing a comprehensive three-pillar strategy centered on domestic resource mobilization, innovative financing, and blended finance. more

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Manual for Stratifying Malaria Risk and the Elimination of Foci

Pan American Health Organization (PAHO) (2022) C_WHO

All malaria-endemic countries in the Region of the Americas have taken on the challenge to eliminate the disease and to put in place measures to orient their health programs and strategies in that direction. This manual explains how to implement measures to achieve malaria elimination and prevent it... more

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Plan of Action for Malaria Elimination 2021-2025

Pan American Health Organization (PAHO) (2022) C_WHO

The Plan of Action for Malaria Elimination 2021-2025 has been developed in consultation with countries and regional partners as a framework of reference to guide the efforts of countries and the contributions of donors and partners towards elimination of the disease in the Americas. The Plan subscri... more

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New Therapeutics for Chagas Disease: Charting a Course to Drug Approval

Man, A. & Segal, F. Intechopen (2022) CC

DOI: 10.5772/intechopen.102891Little progress has been made since the 1960s and 19. 70s to widen the therapeutic arsenal against Trypanosoma cruzi, the causative pathogen of Chagas disease, which remains a frustrating and perplexing infectious disease. This chapter focuses on the strategic and opera... more

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Nutritional interventions update: vitamin D supplements during pregnancy

World Health Organization WHO (2020) C_WHO

The World Health Organization’s comprehensive antenatal care (ANC) guideline WHO recommendations on antenatal care for a positive pregnancy experience was first published in 2016 with the objective of improving the quality of routine health care that all women and adolescent girls receive during p... more

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WHO's response to health emergencies: annual report 2023
recommended

World Health Organisation (WHO) (2024) C_WHO

In 2023, the World Health Organization was responding to 72 health emergencies, including 19 grade-3 emergencies which required the highest level of activation, reaching millions of people. The annual report on WHO’s response to health emergencies in 2023 outlines the increasingly critical role of... more

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Documento de referência sobre a vacina AZD1222 contra COVID-19 desenvolvida pela Universidade de Oxford e pela AstraZeneca, 1 de março de 2021

Pan American Health Organisation PAHO (2021) C_WHO

Este documento de referência foi preparado pelo Grupo de Trabalho sobre Vacinas contra COVID-19 do Grupo Consultivo Estratégico de Especialistas em Imunização (SAGE) para orientar as discussões do SAGE em sua reunião extraordinária de 8 de fevereiro de 2021, que resultou na publicação do do... more

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Examining trends in family planning among harder-to-reach women in Senegal 1992–2014

Cavallaro F. L., L. Benova, D. Macleod et. al. Scientific reports (2017) C2

Recent increases in family planning (FP) use have been reported among women of reproductive age in union (WRAU) in Senegal. However, trends have not been monitored among harder-to-reach groups (including adolescents, unmarried and rural poor women), key to understanding whether FP progress is equita... more

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Non-communicable diseases, injuries, and mental ill-health in Africa: the role of the Africa CDC

Africa Center for Disease Control and Prevention CDC (2022) C_CDC

The Africa Centres for Disease Control and Prevention (Africa CDC) was established in 2017, after the west Africa Ebola virus disease outbreak. Upon creation, the role of Africa CDC was to mandate strengthening of the capacity of public health institutions in Africa to prevent, detect, and respond ... more

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National Policy: Non- Communicable Diseases Secound Edition 2022

Ministry of Health Republic of Ghana; World Health Organization WHO (2022) C_WHO

Non- Communicable Diseases (NCDs) over the years have not been given much attention in Ghana and in most Low and Middle- Income Countries (LMICs). The overwhelming burden of communicable diseases and the scarcity of resources has led to the health of all residents in Ghana, NCDs still remain largely... more

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Scabies Key facts

World Health Organization WHO (2020) C_WHO

Human scabies is a parasitic infestation caused by Sarcoptes scabiei var hominis. The microscopic mite burrows into the skin and lays eggs, eventually triggering a host immune response that leads to intense itching and rash. Scabies infestation may be complicated by bacterial infection, leading to t... more

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Urban flood risk handbook: Assessing risk and identifying interventions

Ferguson, S.; Van Ledden, M.; Rubinyi, S.; Campos, A.; Doeffinger, T. World Bank (2023) CC

This Urban Flood Risk Handbook: Assessing Risk and Identifying Interventions is a roadmap for conducting an urban flood risk assessment in any city in the world. It includes practical guidance for a flood risk assessment project, covering the key hazard and risk modeling stages as well as the evalua... more

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2021 World Health Organization guideline on pharmacological treatment of hypertension: Policy implications for the region of the Americas

Campbell, N.R.C.; Burnens, M.P.; Whelton, P.K. et al. The Lancet Regional Health - Americas (2022) CC

Cardiovascular disease (CVD) is the leading cause of death in the Americas and raised blood pressure accounts for over 50% of CVD. In the Americas over a quarter of adult women and four in ten adult men have hypertension and the diagnosis, treatment and control are suboptimal. In 2021, the World Hea... more

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Nutritional interventions update: multiple micronutrient supplements during pregnancy

World Health Organization WHO (2020) C_WHO

The World Health Organization’s comprehensive antenatal care (ANC) guideline WHO recommendations on antenatal care for a positive pregnancy experience was published in 2016 with the objective of improving the quality of routine health care that all women and adolescent girls receive during pregnan... more

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WASH Climate Resilient Development: Appraising and prioritising options for climate resilient WASH

United Nations Children’s Fund (UNICEF), Global Water Partnership (GWP) (2017)

This Technical Brief focuses on appraising and prioritising options for climate resilience with a view to informing water, sanitation and hygiene (WASH) programme and project design.
This Technical Brief:
- provides a simple scorecard/checklist approach to use as a starting point for appr... more

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Emergency health kits
recommended

World Health Organization WHO (2022) C_WHO

WHO has developed standardized health kits of medicines and medical supplies to meet different health needs in humanitarian emergencies and disasters. These kits are developed to provide reliable and affordable medicines and supplies quickly to those in need. The kits are used by United Nations age... more

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Primeiras medidas para gestão de um surto de diarreia aguda

World Health Organization (2010) C_WHO

The document provides guidelines for the prevention and control of cholera outbreaks. It focuses on key strategies such as improving access to safe drinking water, ensuring proper sanitation, and promoting hygiene practices to prevent the spread of the disease. The guidelines also emphasize the impo... more

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Population size estimate of people who inject drugs (PWID) in the Republic of Kazakhstan

Ganina L.Yu; Yelizaryeva A. V.; Saparbekov M. K.; et al. Ministry of Health and Social Development of the Republic of Kazakhstan Republican Center for AIDS Prevention and Control (2016) C2

Report Almaty, 2016 Authors: Ganina L.Yu., head of epidemiology department, Republican AIDS Center (RAC), Yelizaryeva A. V., epidemiologist, RAC, Kaspirova А. А., head of epidemiology department, Aktobe Oblast AIDS center, IvakinV.Yu., deputy regional director for strategic information, ICA... more

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Supporting the continuity of health and nutrition services in the context of COVID-19 in refugee settings
recommended

UN High Commissioner for Refugees UNHCR (2020) C2

The 2014–2015 Ebola outbreak was catastrophic in West Africa but the indirect impact of increasing the mortality rates of other conditions was also substantial. The increased number of deaths caused by malaria, HIV/AIDS, and tuberculosis attributable to health system failures exceeded deaths from ... more

WHO's response to health emergencies: annual report 2023 recommended

Emergency health kits recommended

Supporting the continuity of health and nutrition services in the context of COVID-19 in refugee settings recommended

WHO's response to health emergencies: annual report 2023
recommended

Emergency health kits
recommended

Supporting the continuity of health and nutrition services in the context of COVID-19 in refugee settings
recommended