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J. Virol., Oct 1996, 6682-6693, Vol 70, No. 10
MA Carpenter, EW Brown, M Culver, WE Johnson, J Pecon-Slattery, D Brousset and SJ O'Brien
Feline immunodeficiency virus (FIV) is a lentivirus which causes an
AIDS-like disease in domestic cats (Felis catus). A number of other felid
species, including the puma (Puma concolor), carry a virus closely related
to domestic cat FIV. Serological testing revealed the presence of
antibodies to FIV in 22% of 434 samples from throughout the geographic
range of the puma. FIV-Pco pol gene sequences isolated from pumas revealed
extensive sequence diversity, greater than has been documented in the
domestic cat. The puma sequences formed two highly divergent groups,
analogous to the clades which have been defined for domestic cat and lion
(Panthera leo) FIV. The puma clade A was made up of samples from Florida
and California, whereas clade B consisted of samples from other parts of
North America, Central America, and Brazil. The difference between these
two groups was as great as that reported among three lion FIV clades.
Within puma clades, sequence variation is large, comparable to
between-clade differences seen for domestic cat clades, allowing
recognition of 15 phylogenetic lineages (subclades) among puma FIV-Pco.
Large sequence divergence among isolates, nearly complete species
monophyly, and widespread geographic distribution suggest that FIV-Pco has
evolved within the puma species for a long period. The sequence data
provided evidence for vertical transmission of FIV-Pco from mothers to
their kittens, for coinfection of individuals by two different viral
strains, and for cross-species transmission of FIV from a domestic cat to a
puma. These factors may all be important for understanding the epidemiology
and natural history of FIV in the puma.
Genetic and phylogenetic divergence of feline immunodeficiency virus in the puma (Puma concolor)
Intramural Research Support Program, National Cancer Institute, Frederick Cancer Research and Development Center, Frederick, Maryland 21702-1201, USA.
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