This study aimed to quantify the variation in individual test - day milk yield and somatic cell count , risk of reproductive failure after first service of dairy cows , and risk of death of calves and heifers according to the BCV and BRSV status of the herd .
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
This study aimed to quantify the variation in individual test - day milk yield and somatic cell count , risk of reproductive failure after first service of dairy cows , and risk of death of calves and heifers according to the BCV and BRSV status of the herd .
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 .