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J. Virol., 01 1998, 57-64, Vol 72, No. 1
SP Morzunov, JE Rowe, TG Ksiazek, CJ Peters, SC St. Jeor and ST Nichol
Nucleotide sequences were determined for the complete M genome segments of
two distinct hantavirus genetic lineages which were detected in hantavirus
antibody- and PCR-positive white-footed mice (Peromyscus leucopus) from
Indiana and Oklahoma. Phylogenetic analyses indicated that although
divergent from each other, the virus lineages in Indiana and Oklahoma were
monophyletic and formed a newly identified unique ancestral branch within
the clade of Sin Nombre-like viruses found in Peromyscus mice.
Interestingly, P. leucopus-borne New York virus was found to be most
closely related to the P. maniculatus-borne viruses, Sin Nombre and
Monongahela, and monophyletic with Monongahela virus. In parallel,
intraspecific phylogenetic relationships of P. leucopus were also
determined, based on the amplification, sequencing, and analysis of the DNA
fragment representing the replication control region of the rodent
mitochondrial genome. P. leucopus mitochondrial DNA haplotypes were found
to form four separate genetic clades, referred to here as Eastern, Central,
Northwestern, and Southwestern groups. The distinct Indiana and Oklahoma
virus lineages were detected in P. leucopus of the Eastern and Southwestern
mitochondrial DNA haplotypes, respectively. Taken together, our current
data suggests that both cospeciation of Peromyscus-borne hantaviruses with
their specific rodent hosts and biogeographic factors (such as allopatric
migrations, geographic separation, and isolation) have played important
roles in establishment of the current genetic diversity and geographic
distribution of Sin Nombre-like hantaviruses. In particular, the unusual
position of New York virus on the virus phylogenetic tree is most
consistent with an historically recent host-switching event.
Copyright © 1998, American Society for Microbiology
Genetic analysis of the diversity and origin of hantaviruses in Peromyscus leucopus mice in North America
Department of Microbiology, University of Nevada, Reno 89557, USA. sergey@med.unr.edu
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