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Browsing Other documents (eg. Reports, Presentations) by Author "Mdegela, R.H."

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    Ecological niche modeling as a tool for prediction of the potential geographic distribution of Bacillus anthracis spores in Tanzania
    (International Society for Infectious Diseases, 2018-11-27) Mwakapeje, E.R.; Ndimuligo, S.A.; Mosomtai, G.; Nyakarahuka, L.; Nonga, H.E.; Mdegela, R.H.; Skjerve, E.; Ayebare, S.
    Anthrax is caused by the spore-forming, Gram-positive bacterium Bacillus anthracis. The aim of this study was to predict the potential distribution of B. anthracis in Tanzania and produce epidemiological evidence for the management of anthrax outbreaks in the country. Methods: The Maxent algorithm was used to predict areas at risk of anthrax outbreaks based on the occurrence and environmental data in Arusha and Kilimanjaro regions; the model was later transferred to predict the entire country. Seventy percent of the occurrence data were used to train the model, while 30% were used for model evaluation. Results: Four regions of northern Tanzania are predicted to have a high risk for anthrax outbreaks, while the southern and western regions had low-risk areas. Soil type (56.5%), soil pH (23.7%), and isothermally (10.4%) were the most important variables for the model prediction, and the most significant soil types were solonetz, fluvisols, and lithosols. Conclusions: A strong risk level across districts of the Tanzania mainland was identified in this study. A total of 18 districts in Tanzania Mainland are predicted to be at very high risk of an anthrax outbreak occurrence. These findings are important for policymakers to effectively mount targeted control measures for anthrax outbreaks in Tanzania
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    Risk factors for human cutaneous anthrax outbreaks in the hot-spot districts of Northern Tanzania: an unmatched case control study
    (Royal Society Open Science, 2018-09-05) Mwakapeje, E.R.; Nonga, H.E.; Mdegela, R.H.; Skjerve, E.; Høgset, S.; Softic, A.; Mghamba, J.
    Bacillus anthracis is an aerobic, Gram-positive and sporeforming bacterium, which causes anthrax in herbivores. Humans get infected after coming into contact with infected animals’ products. An unmatched case–control study was conducted to identify the importance of demographic, biological and/or behavioural factors associated with human cutaneous anthrax outbreaks in the hotspot areas of Northern Tanzania. A semi-structured questionnaire was administered to both cases and controls. The age range of participants was 1–80 years with a median age of 32 years. In the younger group (1–20 years), the odds of being infected were 25 times higher in the exposed group compared to the unexposed group (OR¼ 25, 95% CI ¼ 1.5–410). By contrast, the odds of exposure in the old group ( 20 years) were three times lower in the exposed group compared to the unexposed group (OR ¼ 3.2, 95% CI ¼ 1.28–8.00). Demographic characteristics, sleeping on animal’s skins, contacting with infected carcasses through skinning and butchering, and not having formal education were linked to exposure for anthrax infection. Hence, a One Health approach is inevitable for the prevention and control of anthrax outbreaks in the hotspot areas of Northern Tanzania.