2015 ACVIM Forum Research Abstract Program

A total of 209 veal calves from a pre-weaning fattening unit were enrolled. These calves were followed for a 70-day period in three visits: at day 1 (D1), at day 12 (D12) and at day 30 (D30) after arrival. ADG was calculated at 1 month (ADG1) and 2 month (ADG2) of the pre-weaning period. The 209 veal calves were randomly allocated to one of two treatment groups (Tildipirosin, TILD, n = 109; Placebo, PLAC, n = 100). The label dose of Tildipirosin (ZUPREVO) or the same amount of saline was blindly administered SQ once at D12. At D1, calves were bled (jugular vein punction) to quantify total solids in order to identify cases of failure of passive transfer (FPT). A systematic thoracic ultrasound examination (using 7.5 MHz linear probe) focusing on the maximal depth of consolidation (DEPTH) was performed at each visit. Lung consolidation was defined as DEPTH ≥3 cm.