2018-07-192018-07-192015-10ALMEIDA, Tâmera Nunes Vieira; FIACCADORI, Fabíola Souza; SOUZA, Menira; BORGES, Ana Maria Tavares; CARDOSO, Divina das Dôres de Paula. Molecular characterization of group A rotavirus before and after the introduction of vaccines in Brazil. Revista da Sociedade Brasileira de Medicina Tropical, Uberaba, v. 48, n. 5, p. 599-602, Sept./Oct. 2015.0037-8682e- 1678-9849http://repositorio.bc.ufg.br/handle/ri/15420Introduction: In this study, the molecular characteristics of group A rotavirus (RVA) were compared in samples obtained before and after RVA vaccine-introduction in Brazil. Methods: Eighty samples were screened for the presence of RVA. Positive samples were molecularly analyzed. Results: RVA positivity was 16.9%, with a predominance of G2P[4]. Periods: pre-vaccination: predominance of IId (G1), IId (G2) lineages, and I1 and E1 genotypes; post-vaccination: predominance of Ib (G1), IIa, and IIc (G2) lineages and I2 and E2 genotypes. Conclusions: Although changes in RVA-circulation pattern were observed in the post-vaccination period, it could not be attributed to vaccination process.engAcesso AbertoRotavirus AGastroenteritisVaccineArtigo10.1590/0037-8682-0023-2015