Morbidity and mortality in Holstein calves from birth to 145 days of age on a large dairy farm in Brazil

ABSTRACT The present study aimed to investigate the morbidity and mortality associated with most common diseases during rearing period of Holstein calves in a high-production dairy farm. (n = 600) were allocated three groups based on age: G1 (1-7 days, n 216), G2 (30-40 188), G3 (69-85 196). They evaluated over 60 days at eight different times. rates 47.67% (286/600) for diarrhea, 73.00% (438/600) bovine respiratory disease (BRD), 3.83% (23/600) umbilical inflammation (UI). rate was 2.33% (14/600) all animals studied. differed groups, higher diarrhea (78.85%, 166/216) UI (6.94%, 15/216) G1, highest BRD (79.59%, 156/196). Diarrhea occurrence G2. Even farms good management practices, there is high BRD, decreasing that increasing as get older. In addition, an important risk factor especially younger animals.