| biotic and abiotic effects on the intestinal helminth community of the brown rat rattus norvegicus from rio de janeiro, brazil. | rattus norvegicus has attracted much attention because of its role as a reservoir of zoonotic pathogens. this work aimed to identify the intestinal helminth species in r. norvegicus and to analyse the effects of temperature, rainfall, host age and sex on the helminth community structure. moreover, this study investigated the possible associations among helminth species in an urban population of r. norvegicus in são gonçalo, rio de janeiro, sampled during the rainy and dry seasons over a span of ... | 2016 | 25264030 |
| the chromosomes of rodentolepis nana (siebold, 1852) spasskii, 1954 obtained from naturally infected mice conventionally maintained in a braziuan laboratory animal house. | the karyotype of rodentolepis nana obtained from mice in rio de janeiro, brazil, was described. the diploid chromosome number obtained by the division of embryonic cells was 2n = 12. the first and the third pairs presented subterminal centromeres and the other pairs were all acrocentric. the studied species differed in chromosome morphology when compared to previous description by mutafova and gergova (1994) in bulgaria, suggesting an intraspecific variation. | 2006 | 16605071 |