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      Taxonomy of Trypanosoma cruzi: a commentary on characterization and nomenclature

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      Memórias do Instituto Oswaldo Cruz
      Instituto Oswaldo Cruz, Ministério da Saúde
      Trypanosoma cruzi, taxonomy, characterization, nomenclature

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          Isozymic heterogeneity of Trypanosoma cruzi in the first autochthonous patients with Chagas' disease in Amazonian Brazil.

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            Biodemes and zymodemes of Trypanosoma cruzi strains: correlations with clinical data and experimental pathology

            With the objective of establishing biological and biochemical characteristics of a significant number of Trypanosoma cruzi strains from different geographical areas, 138 strains isolated from naturally infected humans, triatomine or vertebrate hosts were studied; 120 were isolated from different areas of Brazil and 18 from other South and Central American countries. Inocula from triatomine or culture forms were injected into suckling Swiss mice, followed by passages into mice 10 to 12 g. Biological characters and histopathological study permitted the inclusion of the strains into three Types or biodemes: I, II, III. Isoenzymic analysis confirmed a correspondence between the biodemes and zymodemes : Type I and Z2b, Type II and Z2, Type III and Z1. Results showed the ubiquitary distribution of the several types of strains. The predominance of the same Type and zymodeme in one geographical area was confirmed : Type II strains among the human cases from eastern Bahia and east of Goiás; Type III strains from humans of north Brazil and Central America and from silvatic vectors or vertebrates from other geographical areas. The biological types of strains correlate with different histopathological lesions considering cardiac involvement and neuronal lesions. These findings suggest that the biological behavior together with isoenzymes patterns and pathological pictures in the vertebrate host can be an important tool for establishing correlations between strains behavior and clinico-pathological manifestations of Chagas' disease in different geographical areas.
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              Natural populations of Trypanosoma cruzi, the agent of Chagas disease, have a complex multiclonal structure.

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                Author and article information

                Journal
                mioc
                Memórias do Instituto Oswaldo Cruz
                Mem. Inst. Oswaldo Cruz
                Instituto Oswaldo Cruz, Ministério da Saúde (Rio de Janeiro, RJ, Brazil )
                0074-0276
                1678-8060
                September 1999
                : 94
                : suppl 1
                : 181-184
                Affiliations
                [01] Rio de Janeiro RJ orgnameInstituto Oswaldo Cruz orgdiv1 Departamento de Bioquímica e Biologia Molecular Brasil
                Article
                S0074-02761999000700025 S0074-0276(99)09400025
                10.1590/S0074-02761999000700025
                5ae07385-2e3a-43dc-8e74-94ea9056a677

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 09 August 1999
                : 09 June 1999
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 48, Pages: 4
                Product

                SciELO Brazil

                Categories
                Characterization of Trypanosoma cruzi

                nomenclature,Trypanosoma cruzi,taxonomy,characterization

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