Opinión y análisis / Opinion and analysis
Rev Panam Salud Publica 38(3), 2015; Int J Tuberc Lung Dis. 2015;19(4):375–80
Toxicologie Maroc - N° 24 - 1er trimestre 2015
L’orthopoxvirose simienne, aussi connu sous les noms de variole du singe ou monkeypox, est une zoonose causée par l'orthopoxvirus simien et reconnue comme l'infection à orthopoxvirus la plus importante depuis l'éradication de la variole.
Ce cours offre aux personnel de santé publique et aux a...gents de santé des informations approfondies pour comprendre l'épidémiologie, les modes de transmission, la présentation clinique, le diagnostic et le traitement de la variole du singe, ainsi que les stratégies nécessaires pour la prévention, Ce cours offer aussi des suggestions pour mener une enquête et mettre en oeuvre une réponse efficace à une flambée de variole du singe.
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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.
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During Epidemiological week (Epiweek) 5, 20 countries in the WHO African region (WHO AFR) contributed virological data for analysis - Algeria, Burkina Faso, Cameroon, Central African Republic, Côte d’Ivoire, Democratic Republic of the Congo, Ethiopia, Ghana, Madagascar, Mali, Mauritania, Mozambiq...ue, Niger, Nigeria, Rwanda, South Africa, South Sudan, Togo, Uganda, and Zambia
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Between epidemiological weeks (EW) 1 and 22 of 2024, a total of 9,541,015 suspected cases of dengue were reported, resulting in a cumulative incidence of 1,011 per 100,000 population. This represents an increase of 230% compared to the same period in 2023 and 421% compared to the average of the last... 5 years. Figure 1 shows the trend of suspected dengue cases as of EW 22.
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