Abstract
To assess the public health relevance of Lassa arenavirus and hantavirus infections in a subpopulation of recently febrile patients. In a human seroprevalence study, we enrolled 253 participants on the basis of reported high fever during the last 3months. They represented roughly 20% of the population of Bantou and Tanganya villages. Comprehensive serological screening and confirmatory assays (enzyme-linked immunosorbent assay, immunofluorescence assay, Western blot analysis) with several Lassa virus and hantavirus antigens were used to ensure high specificity and broad detection capacity. We found a Lassa IgG prevalence of 40.3% (102/253) and a hantavirus IgG prevalence of 1.2% (3/253). The Lassa IgM prevalence reached 2.8% (7/253). High Lassa virus seroprevalence in recently febrile patients indicates that Lassa fever is a significant public health problem in the region. Human hantavirus infections also occur in the region but their public health relevance remains to be determined.
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