| trypanosoma cruzi (kinetoplastida trypanosomatidae): ecology of the transmission cycle in the wild environment of the andean valley of cochabamba, bolivia. | an active trypanosoma cruzi transmission cycle maintained by wild rodents in the andean valleys of cochabamba bolivia is described. wild and domestic triatoma infestans with 60% infection with t. cruzi were found and was evidenced in 47.5% (rodents) and 26.7% (marsupial) by parasitological and/or serologycal methods. phyllotis ocilae and the marsupial species thylamys elegans, are the most important reservoirs followed by bolomys lactens and akodon boliviensis. in spite of both genotypes (tci an ... | 2006 | 16797540 |
| unequal transmission of mitochondrial haplotypes in natural populations of field mice with xy females (genus akodon). | in species with fertile xy females, such as south american field mice (genus akodon), there are two types of mitochondrial dna (mtdna), one passing from xx females and one from xy females. the xx mothers pass their mtdna to their xx daughters. the xy mothers, however, produce both xx and xy daughters. because of this breeding scheme, the xy mtdna remains isolated whereas the xx lineage is continuously invaded by xy mtdna haplotypes. using a set of recursion equations, i predicted that xy mtdna h ... | 2003 | 12650460 |
| frequencies of chromosomal aberrations in rodents of the rimac valley-perú. | the present study analyzes the frequency of chromosomal aberrations found in rodents living in a polluted area near the rimac river (casapalca, minery zone) at 120 km of lima, compared to that observed in a non-polluted area in the department of lima, perú. the species analyzed were: phyllotis andium, p. darwini and akodon boliviensis. the rodents were captured alive and bone marrow was processed the same day of capture to obtain metaphases. the results showed significant differences (p < 0.05) ... | 1993 | 7606252 |