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Am. J. Trop. Med. Hyg., 61(2), 1999, pp. 220-225
Copyright © 1999 by The American Society of Tropical Medicine and Hygiene

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American Journal of Tropical Medicine and Hygiene, Vol 61, Issue 2, 220-225
Copyright © 1999 by American Society of Tropical Medicine and Hygiene

Research Articles


Sequence analysis of the small RNA segment of guinea pig-passaged Pichinde virus variants

L Zhang, K Marriott, and JF Aronson

The established animal model for Lassa fever is based on the new world arenavirus Pichinde (PIC). Natural isolates of PIC virus are attenuated in guinea pigs, but serial guinea pig passage renders them extremely virulent in that host. We have compared the nucleotide sequences of the small RNA segments of two attenuated, low-passage variants of the PIC virus Munchique strain (CoAn 4763) and two virulent, high-passage derivatives. Missense mutations in the glycoprotein precursor (GPC) gene at codons GPC-119, GPC-140, and GPC-164 and the nucleoprotein gene (NP) codons NP-35 and NP-374 were most closely associated with virulence. Codon GPC-140 is predicted to represent a region of peak hydrophilicity of the glycoprotein 1 (GP1); it is conceivable that mutations at this site could influence virulence by altering B cell epitopes or virus attachment protein conformation.


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Copyright © 1999 by the American Society of Tropical Medicine and Hygiene.