title: Trypanosoma cruzi lineages detected in congenitally infected infants and Triatoma infestans from the same disease-endemic region under entomologic surveillance in Paraguay.
abstract: Trypanosoma cruzi II is associated with Chagas disease in the southern part of South America. We analyzed T. cruzi variants in field-collected triatomines and congenitally infected infants living in the same disease-endemic region in Paraguay. Results of polymerase chain reactions for T. cruzi kinetoplast DNA and satellite DNA were positive in 83 triatomine feces samples and 58 infant blood samples. However, lineages were detected in 33 and 38 samples, respectively. Trypanosoma cruzi genotypes were determined in 56 (97%) blood samples after hybridization by using specific probes. The Tc I genotype was not detected. The prevalent sublineage was Tc IId in triatomines (27 of 33) and infant blood (36 of 58) as assessed by amplification of the 24Salpha ribosomal RNA and the mini-exon region genes. The Tc IIc genotype was detected in 20 infant blood samples and in 1 triatomine. This study shows T. cruzi II is the predominant lineage circulating in triatomines and humans in endemic areas of eastern region of Paraguay.
authors.affiliation: Departamento de Biología Molecular y Genética, Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, Asunción, Paraguay.
authors.forename: Florencia
authors.initials: F
authors.lastname: del Puerto
authors.forename: Zunilda
authors.initials: Z
authors.lastname: Sánchez
authors.forename: Eva
authors.initials: E
authors.lastname: Nara
authors.forename: Graciela
authors.initials: G
authors.lastname: Meza
authors.forename: Berta
authors.initials: B
authors.lastname: Paredes
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Ferreira
authors.forename: Graciela
authors.initials: G
authors.lastname: Russomando
mesh_terms: D000328:Adult; D000818:Animals; D014355:Chagas Disease / Q000453:epidemiology* / Q000469:parasitology*; D002675:Child, Preschool; D019353:Endemic Diseases; D005260:Female; D006801:Humans; D007223:Infant; D018445:Infectious Disease Transmission, Vertical; D008297:Male; D010239:Paraguay / Q000453:epidemiology; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D016053:RNA, Protozoan / Q000235:genetics; D012335:RNA, Ribosomal / Q000235:genetics; D012680:Sensitivity and Specificity; D013045:Species Specificity; D014224:Triatoma / Q000469:parasitology*; D014349:Trypanosoma cruzi / Q000235:genetics*
chemical_list: D016053:RNA, Protozoan; D012335:RNA, Ribosomal