Co-circulation of Astrovirus, Rotavirus and Coronavirus in Brazilian Avian Farms
Co-circulation of Astrovirus, Rotavirus and Coronavirus in Brazilian Avian Farms
Carolina Torres Alejo1,2, Laila Andreia Rodrigues Beserra1,2, Paulo Eduardo Brandão1,2, Luis Ramiro Luna Espinoza1,2 and Fabio Gregori1,2*
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
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