| a longitudinal study of junin virus activity in the rodent reservoir of argentine hemorrhagic fever. | we monitored junin virus (jv) activity in rodent populations for 30 months at seven mark-recapture grids located in agricultural fields and adjacent roadsides and fence lines in endemic and nonendemic areas of argentine hemorrhagic fever. blood and oral swabs taken from rodents captured at five-week intervals were analyzed by enzyme-linked immunosorbent assay for jv antigen (ag). calomys laucha and c. musculinus were the most frequently captured rodents, making up 47% and 22% of captures, respec ... | 1992 | 1335214 |
| microgeographic distribution of allele frequencies in populations of calomys laucha (rodentia, cricetidae). | the microgeographic differentiation of allelic frequencies was analysed in two population samples of calomys laucha, collected in a grid set in cultivated fields at laguna larga (córdoba province, argentina). one of the samples (n = 79) was obtained in may (autumn), when the population density is at a maximum, and the other (n = 85) in november (spring), at the onset of reproductive activity. fst values for the november sample show significant differences between the six groups over which the sa ... | 1991 | 1880049 |
| heterozygosity and gene flow in populations of calomys laucha (rodentia, cricetidae). | enzyme polymorphism was studied by means of starch gel electrophoresis on five population samples of calomys laucha collected in different sites and seasons. c. laucha, a cricetid rodent inhabiting preferentially cultivated fields in the central-eastern plains of argentina, is a reservoir-host of junin virus, agent of argentine hemorrhagic fever. results show high levels of genic variability in all the samples (p from 62.50 to 77.27; h from 0.118 to 0.163) and low genetic distance among populati ... | 1990 | 2194995 |
| epidemiology of argentine hemorrhagic fever. | present knowledge points to horizontal transmission as the most significant mechanism for junín virus maintenance in the main natural reservoirs, namely calomys musculinus and calomys laucha. the existence of naturally infected akodon azarae, both within and outside the endemic area, as well as the finding that other species, ecologically and phylogenetically related to the main reservoirs, such as akodon molinae and calomys callidus, can experimentally develop persistent infections with virus s ... | 1988 | 2841151 |