title: Genotyping of Trypanosoma cruzi sublineage in human samples from a North-East Argentina area by hybridization with DNA probes and specific polymerase chain reaction (PCR).
abstract: We have evaluated blood samples of chronic and congenital Trypanosoma cruzi-infected patients from the city of Reconquista located in the northeast of Argentina where no information was previously obtained about the genotype of infecting parasites. Fourteen samples of congenital and 19 chronical patients were analyzed by hybridization with DNA probes of minicircle hypervariable regions (mHVR). In congenital patients, 50% had single infections with TcIId, 7% single infections with TcIIe, 29% mixed infections with TcIId/e, and 7% had mixed infections with TcIId/b and 7% TcIId/b, respectively. In Chronical patients, 52% had single infections with TcIId, 11% single infections with TcIIe, 26% had mixed infections with TcIId/e, and 11% had non-identified genotypes. With these samples, we evaluated the minicircle lineage-specific polymerase chain reaction assay (MLS-PCR), which involves a nested PCR to HVR minicircle sequences and we found a correlation with hybridization probes of 96.4% for TcIId and 54.8% for TcIIe.
authors.affiliation: Laboratorio de Tecnología Inmunológica, Facultad de Bioquímica y Cs Biológicas, Universidad Nacional del Litoral, Argentina.
authors.forename: Cristina
authors.initials: C
authors.lastname: Diez
authors.forename: Virginia
authors.initials: V
authors.lastname: Lorenz
authors.forename: Silvia
authors.initials: S
authors.lastname: Ortiz
authors.forename: Verónica
authors.initials: V
authors.lastname: Gonzalez
authors.forename: Andrea
authors.initials: A
authors.lastname: Racca
authors.forename: Iván
authors.initials: I
authors.lastname: Bontempi
authors.forename: Silvia
authors.initials: S
authors.lastname: Manattini
authors.forename: Aldo
authors.initials: A
authors.lastname: Solari
authors.forename: Iván
authors.initials: I
authors.lastname: Marcipar
mesh_terms: D001118:Argentina; D001483:Base Sequence; D017931:DNA Primers; D015342:DNA Probes; D005838:Genotype; D006801:Humans; D009693:Nucleic Acid Hybridization; D016133:Polymerase Chain Reaction / Q000379:methods*; D014349:Trypanosoma cruzi / Q000235:genetics*
chemical_list: D017931:DNA Primers; D015342:DNA Probes