| reproduction in a south american mouse, abrothrix longipilis. | approximately 700 abrothrix longipilis were trapped in argentina, and their reproductive organs were studied. some were kept briefly in captivity. males have the same body length as females but are 8% heavier. sexually immature males are shorter and lighter than breeding males of the same age. few individuals in the wild live as long as two years. all overwintering males come into breeding condition in the spring and become infertile in the autumn. all overwintering females have open vaginas in ... | 1992 | 1416099 |
| new genus and six new species of chiggers (acari: trombiculidae and leeuwenhoekiidae) collected from small mammals in argentina. | argentinacarus. n. gen., is proposed with argentinacarus expansus, n. sp., off irenomys tarsalis and akodon longipilis, as type species. quadraseta akodonica, off akodon longipilis and auliscomys micropus, colicus sinpretarsus, off histiotus montanus, parasecia argentinensis off phyllotis xanthopygus, parasecia neuquenensis, off akodon longipilis, and andalgalomacarus xanthopyga, off phyllois xanthopygus and eligmodontia morgani, are described as new. all specimens were collected in argentina. | 1995 | 7650704 |
| [comparison of 4 microscopy techniques for the diagnosis of leptospirosis in wild rodents in a rural area of valdivia, chile]. | kidneys of six different species of 93 wild rodents captured in the rural area of valdivia (chile) were simultaneously examined for leptospira infection by means of levaditi silver stain, dark ground microscopy in wet smears, and immunofluorescence and immunoperoxidase techniques using pooled antiserum against hardjo and pomona serovars. leptospira was shown to be present in 40 (43.0%) rodents. they were detected in five of the six species: akodon olivaceus, akodon longipilis, rattus rattus, ory ... | 1995 | 8850345 |
| seasonal variation in prevalence of antibody to hantaviruses in rodents from southern argentina. | we conducted a small mammal trapping study to investigate temporal variation in prevalence of infection in hantavirus reservoir populations in the patagonian andes mountain range, rio negro province, argentina. rodent blood samples collected in natural and periurban habitats and at the home of an hantavirus pulmonary syndrome (hps) case patient were analysed by enzyme-linked immunosorbent assay. organ tissue samples were tested by polymerase chain reaction (pcr) and nucleotide sequence analysis. ... | 2001 | 11679129 |
| transmission study of andes hantavirus infection in wild sigmodontine rodents. | our study was designed to contribute to an understanding of the timing and conditions under which transmission of andes hantavirus in oligoryzomys longicaudatus reservoir populations takes place. mice were caged in test habitats consisting of steel drums containing holding cages, where seronegative rodents were exposed to wild seropositive individuals by freely sharing the same cage or being separated by a wire mesh. tests were also performed for potential viral transmission to mice from excreme ... | 2004 | 15479837 |
| distribution and abundance of sigmodontine rodents in relation to hantavirus in neuquén, argentina. | in order to estimate spatial distribution, temporal variation, and prevalence of andes hantavirus antibody in the rodent community, and especially in oligoryzomys longicaudatus populations, four different ecosystems were trapped seasonally between spring 2001 and winter 2002 in neuquen, northwestern argentinean patagonia. five peridomestic settings were sampled within the same period. the rodent o. longicaudatus had the widest distribution in neuquen, as it was the only species captured at every ... | 2005 | 16007965 |
| ecology, genetic diversity, and phylogeographic structure of andes virus in humans and rodents in chile. | andes virus (andv) is the predominant etiologic agent of hantavirus cardiopulmonary syndrome (hcps) in southern south america. in chile, serologically confirmed human hantavirus infections have occurred throughout a wide latitudinal distribution extending from the regions of valparaíso (32 to 33 degrees s) to aysén (46 degrees s) in southern patagonia. in this study, we found seropositive rodents further north in the coquimbo region (30 degrees s) in chile. rodent seroprevalence was 1.4%, with o ... | 2009 | 19116256 |
| redescription of the male and description of the female of ixodes abrocomae lahille, 1916 (acari: ixodidae). | the male of ixodes abrocomae lahille, 1916 (acari: ixodidae) is redescribed and the female described for the first time from specimens collected on the rodents abrothrix longipilis (waterhouse), a. olivaceous (waterhouse) and phyllotis xanthopygus (waterhouse) at coquimbo, chile. the males of i. abrocomae are peculiar in having the combination of the following features: length and width less than 2 mm and 1 mm, respectively; hypostome notched with two rows of stout denticles and several small in ... | 2010 | 20852985 |
| description of a new species of haemogamasus (mesostigmata, laelapidae, haemogamasinae) from chubut, río negro and neuquén provinces, argentina. | a new species of haemogamasus mites is described from chubut, neuquén and río negro provinces, argentina. it was collected primarily from rodents of the genus abrothrix (65 of 77 collections): abrothrix longipilis (63), abrothrix olivaceus olivaceus (1) and abrothrix olivaceus xanthorhinus (1). additional collections were made from geoxus valdivianus (5) and loxdomtomys micropus (5). possibly incidental or contaminate collections were recorded from oligoryzomys longicaudatus (1) and dromiciops g ... | 2012 | 22448119 |
| bioenergetics and food preferences in sympatric southern chilean rodents. | ecological divergences in two congeneric sympatric woodland rodents, akodon olivaceus brachiotis and akodon longipilis apta (family cricetidae) was demonstrated from determination of energetic bud gets and food preferences. it was found that each species posseses a different bioenergetic strategy. the heavier (a. longipilis) species has a larger daily energetic budget as compared to the lighter one (a. olivaceus). this phenomenon can be partially explained by their differential selection of seed ... | 1981 | 28311089 |
| a new species of moniliformis from a sigmodontinae rodent in patagonia (argentina). | the majority of species of acanthocephala known thus far from south america have been recorded mostly in fish and wild birds. in particular, rodents in argentina have been poorly studied for acanthocephalans. the genus abrothrix (sigmodontinae-cricetidae) ranges from the altiplano of southern peru through the highlands of bolivia, northern chile, and argentina south through tierra del fuego. the purpose of this paper was to study acanthocephala species parasitizing different populations of abrot ... | 2017 | 28585077 |
| a new species of whipworm from the rodent akodon longipilis in chile. | | 1976 | 1274050 |
| distributional ecology of andes hantavirus: a macroecological approach. | hantavirus pulmonary syndrome (hps) is an infection endemic in chile and argentina, caused by andes hantavirus (andv). the rodent oligoryzomys longicaudatus is suggested as the main reservoir, although several other species of sigmodontinae are known hosts of andv. here, we explore potential andv transmission risk to humans in southern south america, based on eco-epidemiological associations among: six rodent host species, seropositive rodents, and human hps cases. | 2018 | 29929522 |
| molecular survey and genetic diversity of hemoplasmas in rodents from chile. | even though hemotrophic mycoplasma (hemoplasma) infections are well documented in a wide variety of hosts worldwide, there is a gap in the knowledge aobut hemoplasmas in rodents. this study aimed to molecularly survey and investigate the genetic diversity of hemoplasmas in rodents from chile. synanthropic and wild rodents (n = 74) were captured in the southern province of valdivia (corral, valdivia, riñihue, and reumén localities). spleen samples were submitted to a conventional pcr for hemotrop ... | 2020 | 33003287 |
| molecular survey of bartonella spp. in rodents and fleas from chile. | the aim of this study was to molecularly survey bartonella spp. in rodents from the valdivia province, southern chile and from wild black rat-fleas in guafo island, chilean patagonia. thrity-three spleens from synanthropic (mus musculus, rattus novergicus and rattus rattus) and wild (abrothrix longipilis, oligoryzomys longicaudatus, abrothrix sp.) rodents from valdivia and 39 fleas/flea-pools (plocopsylla sp. and nosopsyllus sp.) from r. rattus in guafo island were obtained. all samples were scr ... | 2020 | 32835672 |
| genetic variation of the chilean endemic long-haired mouse abrothrix longipilis (rodentia, supramyomorpha, cricetidae) in a geographical and environmental context. | quaternary climate and associated vegetational changes affected the fauna of the chilean mediterranean ecosystem. here we studied the genetic variation of the long-haired mouse, abrothrix longipilis, a sigmodontine rodent endemic to this area. within an environmentally explicit context, we examined the geographic distribution of the genetic diversity and demographic history of the species based on sequences of the mitochondrial cytochrome-b gene of 50 individuals from 13 localities and a large p ... | 2020 | 32742796 |