Reference | Maynou2017 (10054)

Data were collected from 8 commercial Holstein dairy farms selected out of 69 farms, for which the calf management was known. Farms were selected according to herd size and the milk source that dairy producers used to feed their calves. In 4 of the farms, calves were offered milk replacer (MR), and in the other 4 farms, calves were offered waste milk (WM) from cows either receiving antimicrobial therapy or having with high SCC. Calves were removed from their dams at birth and offered at least 2 feedings of 2 to 3 L of colostrum. Calves received milk for at least until 6 wk after birth and in some farms calves consumed milk for as long as 12 wk of age. Calves were offered 2 L of milk (MR or WM) twice daily in most of the farms. Generally, calves were housed individually during the first weeks of life, and then moved to group pens before weaning.

In each farm, fecal and nasal swabs were sampled from 20 ± 5 female calves at 42 ± 3.2 d of age

AST Method: None

Reference explicitly reports AST breakpoints: True

Reference reports using a MIC table: False