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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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Follow-up and tracing of tuberculosis patients who fail to attend their scheduled appointments in Cotonou, Benin: a retrospective cohort study

Serge Ade1, Arnaud Trébucq, Anthony D. Harries, Gabriel Ade, Gildas Agodokpessi, Prudence Wachinou, Dissou Affolabi, Sévérin Anagonou BMC Health Services Research (2016) C2

Ade et al. BMC Health Services Research (2016) 16:5 Background: In the “Centre National Hospitalier de Pneumo-Phtisiologie” of Cotonou, Benin, little is known about the characteristics of patients who have not attended their scheduled appointment, the results of tracing and the possible b... more

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Assessing the impact of imperfect immunoassays on HIV prevalence estimates from surveys conducted by the DHS program

Mathieu Maheu-Giroux, Lawrence Joseph, Patrick Belisle and others (2017) C2

This report investigates the impact of potential misclassification of samples on HIV prevalence estimates for 23 surveys conducted from 2010-2014. In addition to visual inspection of laboratory results, we examined how accounting for potential misclassification of HIV status through Bayesian latent ... more

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Determinants Of Coital Frequency Among Married Women In Central African Republic: The Role Of Female Genital Cutting

Stewart H.; L. Morrison; R. White Journal of Biosocial Science (2002) C1

Journal of Biosocial Science / Volume 34 / Issue 04 / October 2002, pp 525 - 539 DOI: DOI:10.1017/S0021932002005254, Published online: 24 September 2002 This paper examines determinants of one aspect of sexual behaviour – coital frequency – among 2188 married women in the Central African Re... more

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Country Office Annual Report 2022 Namibia-Update on the context and situation of children

UNICEF (2022) C_UNICEF

In 2022, Namibia had an estimated population of 2.6 million people, where 51 per cent per cent are females and 52.5 per cent of households in urban areas, with fast-growing urban informal settlements which lack access to basic services. Namibia has a young population; 42 per cent are children (0-17 ... more

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Effectiveness of community health worker training programmes for cardiovascular disease management in low-income and middle-income countries: a systematic review

Abdel-All, M; Putica, B.; Praveen, D. et al. BMJ Open (2017) CC

Introduction Community health workers (CHWs) are increasingly being tasked to prevent and manage cardiovascular disease (CVD) and its risk factors in underserved populations in low-income and middle-income countries (LMICs); however, little is known about the required training necessary for them to ... more

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World Heart Federation Roadmap for Hypertension – A 2021 Update

Jemoon, P.; Séverin, T.; Amodeo, C. et al. Global Heart (2021) CC

The World Heart Federation (WHF) Roadmap series covers a large range of cardiovascular conditions. These Roadmaps identify potential roadblocks and their solutions to improve the prevention, detection and management of cardiovascular diseases and provide a generic global framework available for loca... more

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Burden of Peripheral Artery Disease and Its Attributable Risk Factors in 204 Countries and Territories From 1990 to 2019

Lin, J.; Chen, Y.; Jiang, N. et al. Frontiers in Cardiovascular Medicine (2022) CC

Background: Data on burden of peripheral artery disease (PAD) and its attributable risk factors are valuable for policymaking. We aimed to estimate the burden and risk factors for PAD from 1990 to 2019. Methods: We extracted the data on prevalence, incidence, death, years lived with disability (YLD... more