Constelação completa dos genótipos de cepas raras de rotavírus G12P[9] e G12P[6] detectadas no Brasil de 2011-2020 / Complete constellation of genotypes of rare rotavirus strains G12P[9] and G12P[6] detected in Brazil from 2011-2020

RESUMO

Cepas atípicas de RVA isoladas de humanos e animais compartilham características genéticas e antigênicas, sugerindo fortemente uma transmissão interespécie. O G12 é, atualmente, reconhecido como um genótipo emergente globalmente. Neste estudo, foram caracterizados os genomas de três espécies raras G12P[9] (RVA/Human-wt/BRA/IAL-R870/2013/G12P[9], RVA/Human-wt/BRA/IAL-R1151/2012/G12P[9] e RVA/Human-wt/BRA/IAL R566/2011/G12P[9]) e quatro G12P[6] (RVA/Human-wt/BRA/IAL-R86/2011/G12P[6], RVA/Human-wt/BRA/IAL-R465/2019/G12P[6], RVA/Human-wt/BRA/IAL-R52/2020/G12P[6] e RVA/Human-wt/BRA/IAL-R95/2020/G12P[6]) detectadas em amostras de fezes de pacientes com gastroenterite aguda no Brasil durante a Vigilância Nacional de Rotavírus realizada de 2011 a 2020. As cepas foram submetidas a RT-PCR convencional para os 11 segmentos seguido do sequenciamento de Sanger e análise filogenética. Todas as cepas G12P[9] exibiram uma constelação genética AU-1-like (G12-P[9]-I3-R3-C3-M3-A3-N3-T3-E3-H6), enquanto as cepas G12P[6] mostraram a típica DS-1-like (G12-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2). A partir do estudo filogenético, as cepas brasileiras IAL G12P[6] DS-1-like mostram ancestralidade genética africana e rearranjos com cepas americanas co-circulantes, sem evidências de transmissão zoonótica recente. Em relação às cepas brasileiras IAL G12P[9], estas evidenciam ancestralidade genética asiática e observa-se a evidência de transmissão interespecífica entre cepas humanas G12P[9] AU-1-like e cepas felinas/caninas...(AU)

ABSTRACT

Atypical RVA strains isolated from humans and animals share genetic and antigenic features, strongly suggesting an interspecies transmission. G12 type are currently recognized as a globally emerging genotype. In this study, were characterized the complete genomes of three rare G12P[9] (RVA/Human-wt/BRA/IAL-R870/2013/G12P[9], RVA/Human-wt/BRA/IAL-R1151/2012/G12P[9] and RVA/Human-wt/BRA/IAL-R566/2011/G12P[9]) and four G12P[6] (RVA/Human-wt/BRA/IAL-R86/2011/G12P[6], RVA/Human-wt/BRA/IAL-R465/2019/G12P[6], RVA/Human-wt/BRA/IAL-R52/2020/G12P[6] and RVA/Human-wt/BRA/IAL-R95/2020/G12P[6]) strains detected in stool samples from patients with acute gastroenteritis in Brazil during National Brazilian Rotavirus surveillance conducted from 2011 to 2020. The RVA strains were submitted to conventional RT-PCR targeting the 11 gene segments followed by Sanger sequencing and phylogenetic analysis. All G12P[9] strains displayed an AU-like genetic backbone constellation (G12-P[9]-I3-R3-C3-M3-A3-N3-T3-E3-H6), while G12P[6] strains showed the typical DS-1-like genetic backbone (G12-P[6]-I2-R2-C2-M2-A2-N2-T2-E2-H2). From the phylogenetic study, the Brazilian IAL G12P[6] DS-1-like strains show African genetic ancestry and rearrangements with co-circulating American strains belonging to the DS-1-like constellation, without evidence of recent zoonotic transmission. On other hand, the Brazilian IAL G12P[9] strains show Asian genetic...(AU)