| interrelationship between ectoparasites and wild rodents from tijucas do sul, state of paraná, brazil. | sixteen species of ectoparasites were collected from 50 wild rodents, from august 1990 to august 1991, in an area of araucaria augustifolia forest, in the municipality of tijucas do sul, state of paraná, brazil. ectoparasites infested 98% of the rodents, with the highest indices of infestation found in the drycool season. species that occurred in single or multiple infestations were recorded. ectoparasite/host associations were significant (p < 0.01) for gigantolaelaps wolffsohni/oryzomys nigrip ... | 1998 | 9921290 |
| comparative chromosome maps of neotropical rodents necromys lasiurus and thaptomys nigrita (cricetidae) established by zoo-fish. | this work presents chromosome homology maps between mus musculus (mmu) and 2 south american rodent species from the cricetidae group: necromys lasiurus (nla, 2n = 34) and thaptomys nigrita (tni, 2n = 52), established by zoo-fish using mouse chromosome-specific painting probes. extending previous molecular cytogenetic studies in neotropical rodents, the purpose of this work was to delineate evolutionary chromosomal rearrangements in cricetidae rodents and to reconstruct the phylogenetic relations ... | 2011 | 21846965 |
| hantavirus infection prevalence in wild rodents and human anti-hantavirus serological profiles from different geographic areas of south brazil. | paraná state presents the fourth highest number of accumulated cases of hantavirus pulmonary syndrome in brazil. to map the risk areas for hantavirus transmission we carried out a study based on rodent trapping and determined the anti-hantavirus seroprevalence in these animals and in the inhabitants of these localities. overall seroprevalence in rodents and humans were 2.5% and 2.4%, respectively. eighty-two percent of the seropositive rodents were genetically analyzed. phylogenetic analyses rev ... | 2012 | 22855773 |
| population ecology of hantavirus rodent hosts in southern brazil. | in this study we analyze population dynamics of hantavirus rodent hosts and prevalence of infection over a 2-year period in southern brazil, a region with a high incidence of hantavirus pulmonary syndrome. the 14 small mammal species captured were composed of 10 rodents and four marsupials, the six most abundant species being akodon serrensis, oxymycterus judex, akodon montensis, akodon paranaensis, oligoryzomys nigripes, and thaptomys nigrita. these species displayed a similar pattern with incr ... | 2014 | 24935954 |
| variable patterns of y chromosome homology in akodontini rodents (sigmodontinae): a phylogenetic signal revealed by chromosome painting. | the akodontini is the second most speciose tribe of sigmodontine rodents, one of the most diverse groups of neotropical mammals. molecular phylogenetic analyses are discordant regarding the interrelationships of genera, with low support for some clades. however, two clades are concordant, one (clade a) with akodon sensu strictu (excluding akodon serrensis), "akodon" serrensis, bibimys, deltamys, juscelinomys, necromys, oxymycterus, podoxymys, thalpomys and thaptomys, and another (clade b) with b ... | 2012 | 22711265 |