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Lassa fever in post-conflict Sierra Leone

This resource presents observations of case fatality rates of Lassa fever in Sierra Leone after the civil war and compared to studies completed prior to the conflict. Peak presentation of Lassa fever cases occurs in the dry season, which is consistent with previous studies. This paper's studies also confirmed reports conducted prior to the civil war that indicate that infants, children, young adults, and pregnant women are disproportionately impacted by Lassa fever.

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Lassa Fever: a rodent-human interaction

This resource examines the sites of interactions between humans and the multimammate mouse, Mastomys natalensis. It presents findings such as new arenaviruses in other African rodents and in snakes, that  argue preferably toward the host-switching concept. The recent emergence in Sierra Leone, the absence of virus positive Mastomys between the two endemic zones and poor virus diversity in the Mano River area also point in the direction of a unique import of Lassa virus from Nigeria to Sierra Leone during the 19th century. This resource also discusses the hypothesis of human displacements through the Atlantic slave trade and its abolition in 1807.

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Diversity and dynamics in a community of small mammals in coastal Guinea, West Africa

This resource investigated three villages in high endemic zones of Lassa fever in Guinea and presents the biodeiversity of the small mammal community identified through standardized trapping in houses, cultivations and forest.

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Forecasting rodent outbreaks in Africa: an ecological basis for Mastomys control in Tanzania

This study collected rainfall data preceding historical outbreaks of Mastomys rats in East Africa in order to test the hypothesis that such outbreaks occur after long dry periods. It found that rodent outbreaks were generally not preceded by long dry period and the population dynamics of Mastomys natalensis rats in Tanzania are significantly affected by the distribution of rainfall during the rainy season.

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WHO: Lassa fever research and development (R&D) roadmap

This resource provides a framework for identifying the vision, underpinning strategic goals, and prioritizing areas and activities for accelerating the collaborative development of medical countermeasures.

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Power, fairness and trust : understanding and engaging with vaccine trial participants and communities in the setting up the EVOVAC-Salone vaccine trial in Sierra Leone

In this article the authors discuss the implementation of an Ebola vaccine trial in Kambia district in Sierra Leone during and after the epidemic. They analyze the role of social science research for the development of community engagement strategies. The authors give special attention to the analysis of rumours as source of information and explanation about resistance rooted in a much deeper sociopolitical context.

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Lassa fever: The politics of an emerging disease and the scope for One Health

As a rodent borne virus, Lassa fever is of particular interest from a One Health perspective. The interplay between security, public health and One Health approaches are explored through ethnographic and interview based research in Kenema, Sierra Leone, a long-term treatment and research hub. ‘Biodefence dollars’ have provided the majority of recent funding in Sierra Leone and have created opportunities for both local and international actors to address a neglected disease.

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Understanding the cryptic nature of Lassa fever in West Africa

In this article the authors give an overview of the current knowledge on Lassa fever (ecology, epidemiology and distribution) and the importance of future socio-ecological changes in the increase of Lassa fever burden.

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Using modelling to disentangle the relative contributions of zoonotic and anthroponotic transmission: The case of Lassa fever

The authors present the results of a modelling approach, using published data from outbreak and patients to Kenema governmental Hospital in Sierra Leone. They estimate the likely contribution to human to human transmission. They shed light on the need to better assess the human to human transmission.

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Fluctuation of abundance and Lassa virus prevalence in Mastomys Natalensis in Guinea, West Africa

This study investigates the link between the ecology of the M. Natalensis and the incidence of Lassa fever in human cases in Guinea. They found that the risk for Lassa virus transmission was present in both rainy and dry season; however the risk increased in the dry season because of the possibility of encountering rodent excreta in the houses.

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