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Filoviral hemorrhagic fever (FHF) is caused by ebolaviruses and marburgviruses, which both belongto the family Filoviridae. Egyptian fruit bats (Rousettus aegyptiacus) are the most likely natural reservoir for marburg viruses and entry into caves and mines that they stay in has often been associated
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with outbreaks of MVD. On the other hand, the natural reservoir for ebola viruses remains elusive;however, handling of wild animal carcasses has been associated with some outbreaks of EVD. In thelast two decades, there has been an increase in the incidence of FHF outbreaks in Africa, some beingcaused by a newly found virus and some occurring in previously unaffected areas such as Guinea, Liberia and Sierra Leone, in which the most recent EVD outbreak occurred in 2014. Indeed, the predicted geographic distribution of filoviruses and their potential reservoirs in Africa includes manycountries in which FHF has not been reported. To minimize the risk of virus dissemination inpreviously unaffected areas, there is a need for increased investment in health infrastructure in African countries, policies to facilitate collaboration between health authorities from different countries, implementation of outbreak control measures by relevant multi-disciplinary teams and education of the populations at risk.
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Between April 2018 and November 2020, the Democratic Republic of Congo (DRC) experienced its 11th Ebola virus disease (EVD) outbreak. Tanzania’s cross-border interactions with DRC through regular visitors, traders, and refugees are of concern, given the potential for further spread to neighboring
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countries. This study aimed to estimate the risk of introducing EVD to Tanzania from DRC. National data for flights, boats, and car transport schedules from DRC to Tanzania covering the period of May 2018 to June 2019 were analyzed to describe population movement via land, port, and air travel and coupled with available surveillance data to model the risk of EVD entry. The land border crossing was considered the most frequently used means of travel and the most likely pathway of introducing EVD from DRC to Tanzania. High probabilities of introducing EVD from DRC to Tanzania through the assessed pathways were associated with the viability of the pathogen and low detection capacity at the ports of entry. This study provides important information regarding the elements contributing to the risk associated with the introduction of EBV in Tanzania. It also indicates that infected humans arriving via land are the most likely pathway of EBV entry, and therefore, mitigation strategies including land border surveillance should be strengthened.
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The Tanzania Public Health Bulletin provides updates on important public health issues in Tanzania. It includes government statements, surveillance reports, outbreak updates, and research articles on communicable diseases such as Ebola and cholera. The bulletin aims to inform health professionals, p
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olicymakers, researchers, and the general public by sharing evidence-based information, surveillance data, and public health recommendations to strengthen disease prevention, outbreak preparedness, and health promotion in Tanzania.
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