Recent Lassa virus strains from Nigeria were completely or partially sequenced. Phylogenetic analysis revealed the predominance of lineage II and III strains, the existence of a previously undescribed (sub)lineage in Nigeria, and the directional spread of virus in the southern part of the country. The Bayesian analysis also provided estimates for divergence times within the Lassa virus clade.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3067713PMC
http://dx.doi.org/10.1128/JCM.01891-10DOI Listing

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