title: Response to chemotherapy with benznidazole of clones isolated from the 21SF strain of Trypanosoma cruzi (biodeme Type II, Trypanosoma cruzi II).
abstract: Susceptibility to chemotherapy with benznidazole was investigated of 5 clones isolated from the 21 SF strain (biodeme Type II, Trypanosoma cruzi II). Swiss mice were infected with the parental strain for each clone and submitted to chemotherapy with benznidazole (100mg/kg/day during 90 days). Treatment determined negativity of the parasitemia. Cure rates were evaluated by parasitological cure tests. Serology was evaluated for treated animals (titers from negative to 1:640) and untreated controls (1:160 to 1:640). Cure rates varied from 30 to 100% for the 5 clones, and were 25% for the parental strain. Results suggested that the variability of response to treatment of the clonal populations of Trypanosoma cruzi II strains is responsible for the high variation in the response to chemotherapy with benznidazole and nifurtimox by strains of this biodeme.
authors.affiliation: Laboratório de Chagas Experimental, Autoimunidade e Imunidade Celular, Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, BA, Brasil.
authors.forename: Rozália Figueira
authors.initials: RF
authors.lastname: Campos
authors.forename: Marcos Lázaro S
authors.initials: ML
authors.lastname: Guerreiro
authors.forename: Karina de Souza Castro
authors.initials: Kde S
authors.lastname: Sobral
authors.forename: Rita de Cássia P Cunha
authors.initials: Rde C
authors.lastname: Lima
authors.forename: Sonia G
authors.initials: SG
authors.lastname: Andrade
mesh_terms: D000818:Animals; D014355:Chagas Disease / Q000188:drug therapy* / Q000469:parasitology; D051379:Mice; D009593:Nitroimidazoles / Q000627:therapeutic use*; D018512:Parasitemia / Q000188:drug therapy; D013997:Time Factors; D014344:Trypanocidal Agents / Q000627:therapeutic use*; D014349:Trypanosoma cruzi / Q000187:drug effects* / Q000235:genetics
chemical_list: D009593:Nitroimidazoles; D014344:Trypanocidal Agents; C009999:benzonidazole