Open Special Issues Call for Special Issues Special Issue Guidelines Published Special Issues Mini-Review Co-circulation of Astrovirus, Rotavirus and Coronavirus in Brazilian Avian Farms

Abstract

| Several viruses are associated with enteric diseases in avian species, causing decreased growth performance and mortality. In this study, 59 pools of intestinal content of layers, broilers, and breeders were investigated from different Brazilian regions for the presence of rotavirus (RVA, RVD, and RVF), avian coronavirus (ACoV), and avian astrovirus (AAstV), using PCR reactions followed by nucleotide sequencing and analysis. Twenty-nine pools (29/59; 49%) appeared positive for AAstV, 6 pools (6/59; 10%) were positive for RVD, forty-three pools (43/59; 72.8%) were positive for ACoV, and twenty-four pools (24/59; 40.67%) presented concomitant viral infections of two or three investigated agents. The relative high frequency of occurrence of the studied viruses both in single or concomitant infection emphasizes the need for continued monitoring of poultry flocks to better understand its epidemiology and understanding the impact of one virus on the pathobiology of second virus.

>b<Rotavírus em aves>/b<: uma revisão sistemática

“…Os RVs afetam indivíduos de diferentes faixas etárias, entretanto os jovens são mais suscetíveis e a mortalidade acaba sendo maior (DHAMA et al, 2015), uma vez que podem ocorrer infecções virais concomitantes com outros agentes, como bactérias (E. coli, Enterecoccus), outros vírus (coronavírus, astrovírus, entre outros) (ALEJO et al, 2017) e protozoários (Eimeira spp). No caso de infecções mistas, os impactos costumam ser ainda maiores (DHAMA et al, 2015).…”