A significant reduction in milk yield was observed for cows in presumably BRSV recently infected herds , as well as in herds having a presumably BRSV - related clinical outbreak
compared with cows in presumably infection - free herds .
A significant reduction in milk yield was observed for cows in presumably BRSV recently infected herds , as well as in herds having a presumably BRSV - related clinical outbreak ( of 0.57 and 0.91 kg / d , respectively ) , compared with cows in presumably infection - free herds .
A significant reduction in milk yield was observed for cows in presumably BRSV recently infected herds , as well as in herds having a presumably BRSV - related clinical outbreak ( of 0.57 and 0.91 kg / d , respectively ) , compared with cows in presumably infection - free herds .