Browsing by Author "Torres-Pérez, F"

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    Peridomestic small mammals associated with confirmed cases of human hantavirus disease in southcentral Chile
    (2004) Torres-Pérez, F; Navarrete-Droguett, J; Aldunate, R; Yates, TL; Mertz, GJ; Vial, PA; Ferrés, M; Marquet, PA; Palma, RE
    Cases of human hantavirus disease have been reported in Chile since 1995, most of them in people living in rural and periurban areas. We conducted a peridomestic study of small mammals to evaluate the relationships between the presence of rodents with antibodies to Andes virus confirmed human cases of hantavirus pulmonary syndrome in southcentral Chile. The results of 20 sampled sites, which involved the capture of 272 mice over an 18-month period, showed the occurrence of 10 small mammal species, of which Oligoryzomys longicaudatus was the only seropositive species for hantavirus, with an intra-specific serologic rate of 10.4%.
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    Phylogeography of Oligoryzomys longicaudatus (Rodentia: Sigmodontinae) in temperate South America
    (2005) Palma, RE; Rivera-Milla, E; Salazar-Bravo, J; Torres-Pérez, F; Pardiñas, UFJ; Marquet, PA; Spotorno, AE; Meynard, AP; Yates, TL
    Phylogeographic relationships were evaluated at the intraspecific level using nucleotide sequence data from the mitochondrial cytochrome b gene of representative specimens of "colilargo" (Oligoryzomys longicaudatus) from 31 localities, along its distributional range over a large part of the western Andes and southern Argentina. Based on approximately 1,000 base pairs (bp), we recognized a single species on both the Chilean and the Argentinean side as far as at least latitude 51degreesS, rejecting the subspecific distinctiveness of longicaudatus and philippi. We thus placed the latter in full synonymy with O. longicaudatus as earlier studies proposed, and enlarged its range as far as Torres del Paine, about 51degreesS. The occurrence of subspecies in this range is doubtful given the low sequence divergence values and the absence of significant associations between haplotypes and their geography. Additionally, we hypothesized that the entrance of this species into the Chilean side of the Andes mountains occurred through the Patagonian forests of southern Argentina, with further dispersal to the north from the south.