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characterization of trypanosoma cruzi strains isolated from chronic chagasic patients, triatomines and opossums naturally infected from the state of rio grande do sul, brazil.thirty-five trypanosoma cruzi strains were isolated from chronic chagasic patients, triatomines and opossums from different municipalities of the state of rio grande do sul. parasites were characterized by means of mice infectivity, enzyme electrophoresis and randomly amplified polymorphic dna (rapd) analysis. twenty-nine strains were isolated from chagasic patients, 4 from triatomines (2 from triatoma infestans and 2 from panstrongylus megistus) and 2 from opossums didelphis albiventris. thirty ...19979332599
occurrence of gastrointestinal protozoa in didelphis albiventris (opossum) in the central region of rio grande do sul state.the aim of this study was to evaluate the parasitism by gastrointestinal protozoa in didelphis albiventris (opossum) in the central region of rio grande do sul state. fecal samples from six free living opossums were collected for research of parasites. samples were analyzed by the centrifugal-flotation method with zinc sulfate and parasites were identified microscopically based on (oo)cyst size and morphology. cysts of giardia sp. and oocysts of cryptosporidium sp. and eimeria sp. were observed ...200818035587
evaluation of natural foci of panstrongylus megistus in a forest fragment in porto alegre, state of rio grande do sul, brazil.panstrongylus megistus is commonly found in wild environments of the state of rio grande do sul, brazil. the aim of this study was to characterize the network of refuges used by triatomine in a forest fragment of porto alegre and to identify trypanosoma cruzi infection, associated hosts and the epidemiological importance of both hosts and triatomines.201324270248
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