title: [Biological and histopathological characterization together with nucleic acids analysis of a Trypanosoma cruzi strain from Marília, São Paulo State].
abstract: The aim of this report was to study the biological and histopathological behavior of a Trypanosoma cruzi strain, which is found in the region of Marília. The strain was isolated in 1997, by artificial xenodiagnosis. Twenty-five swiss mice were intraperitoneally inoculated. Eleven were used for observation of parasitemia and trypomastigotes morphology and 14 were sacrificed after 17, 23, 30, 60 and 180 days post-infection. Heart, esophagus, liver, colon, and skeletal muscle (fragment of the right thigh) were collected for histopathological study. LIT culture medium was accomplished for DNA analysis. The results showed predominance of broad forms, low parasitemia with mean peaks of 860 trypomastigotes/5mul of blood of the 20th day of infection. No animal died in the acute phase of infection. Histopathological analysis showed several pseudocysts of amastigotes in heart, rare in skeletal muscle and colon with discreet inflammatory process. When Famema strain was compared with Y strain, which was isolated from a patient who lived in the same area, a distinct behaviour and biological characteristics were observed. However, DNA analysis placed them in same group, hence displaying the proximity of these strains.
authors.affiliation: Disciplina de Parasitologia, Faculdade de Medicina de Marília, Universidade Estadual Paulista Júlio de Mesquita Fiho, Arataquara, SP, Brasil. luciapam@famema.br
authors.forename: Luciamáre Perinetti Alves
authors.initials: LP
authors.lastname: Martins
authors.forename: Roberto Esteves Pires
authors.initials: RE
authors.lastname: Castanho
authors.forename: João Aristeu
authors.initials: JA
authors.lastname: da Rosa
authors.forename: Luiz Carlos
authors.initials: LC
authors.lastname: da Silva
authors.forename: Charles Antônio Pires
authors.initials: CA
authors.lastname: de Godoy
authors.forename: Raphael de Maurício
authors.initials: Rde M
authors.lastname: Rosa
mesh_terms: D000818:Animals; D016054:DNA, Protozoan / Q000032:analysis*; D006801:Humans; D008297:Male; D051379:Mice; D008875:Middle Aged; D018512:Parasitemia / Q000469:parasitology; D016133:Polymerase Chain Reaction; D014349:Trypanosoma cruzi / Q000235:genetics / Q000472:pathogenicity*
chemical_list: D016054:DNA, Protozoan
vernacular_title: Caracterização biológica, histopatológica e análise de ácido nucléico de uma cepa Trypanosoma cruzi da região de Marília, SP, Brasil.