| flock-level prevalence, geographical distribution, and seasonal variation of avian reovirus among broiler flocks in ontario. | avian reovirus (arv) is an economically significant pathogen of broiler chickens. our objective was to determine the prevalence, geographical distribution, and seasonal variation of arv infection among commercial broiler flocks in ontario, canada during grow-out. a cross-sectional study of 231 randomly selected flocks was conducted from july 2010 to january 2012. fifteen blood samples, 15 whole intestines, and 15 cloacal swabs per flock were collected at slaughter; elisa and pcr were used to det ... | 2017 | 28761188 |