Journal
EMERGING INFECTIOUS DISEASES
Volume 6, Issue 5, Pages 466-476Publisher
CENTER DISEASE CONTROL
DOI: 10.3201/eid0605.000504
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We describe the isolation and characterization of a new Lassa virus strain imported into Germany by a traveler who had visited Ghana, Cote D'Ivoire, and Burkina Faso. This strain, designated AV, originated from a region in West Africa where Lassa fever has not been reported. Viral S RNA isolated from the patient's serum was amplified and sequenced. A long-range reverse transcription polymerase chain reaction allowed amplification of the full-length (3.4 kb) S RNA. The coding sequences of strain AV differed from those of all known Lassa prototype strains (Josiah, Nigeria, and LP) by approximately 20%, mainly at third codon positions. Phylogenetically, strain AV appears to be most closely related to strain Josiah from Sierra Leone. Lassa viruses comprise a group of genetically highly diverse strains, which has implications for vaccine development. The new method for full-length S RNA amplification may facilitate identification and molecular analysis of new arenaviruses or arenavirus strains.
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