MANAGEMENT FACTORS RELATED TO SALMONELLA SHEDDING BY DAIRY HEIFERS

In a national survey of dairy operations with greater than or equal to 30 milking cows, fecal samples from 6861 preweaned dairy heifer calve s on 1063 operations were tested for Salmonella. One hundred forty-fiv e (2.1%) of the fecal samples from 79 (7.4%) of the farms tested posit ive for Salmonella. A multivariate logistic regression model revealed that medicated milk replacer and hay fed to dairy heifers from 24 h of age until weaning were associated with a reduced risk of Salmonella s hedding, as was calving in an individual animal area within a building .