ArticleVirus evolution2026
Genomic epidemiology and evolutionary analysis of Lassa virus from small mammals suggest bidirectional viral movement across humans and animals.
Article in Virus evolution, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Lassa fever is a viral haemorrhagic fever that poses a persistent public health threat in several West African countries, particularly Nigeria. The scarcity of Lassa virus (LASV) sequences isolated from small mammal reservoirs limits our knowledge and understanding of LASV genomic diversity and transmission dynamics. To address this knowledge gap, we sampled 1189 small mammals, including mice, rats, and shrews, from two LASV-endemic states in southern Nigeria (Ondo and Ebonyi States) and tested them for the presence of LASV RNA using reverse transcription-quantitative polymerase chain reaction. Selected quantitative polymerase chain reaction-positive samples were subjected to whole genome sequencing and small mammal speciation through next-generation sequencing outputs. We recorded an overall polymerase chain reaction positivity rate of 61.6%, with rat species demonstrating the highest LASV prevalence. We also conducted a serosurvey of 269 small rodents using indirect Enzyme-Linked Immunosorbent Assay (ELISA) and obtained an overall anti-LASV seroprevalence of 45%. Using the Nextera XT metagenomic sequencing protocol, we produced 55 LASV partial (
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