Thiamin Status and Growth Performance of Cattle New to the Feedlot Environment as Affected by Amprolium and Supplemental Dietary Thiamin

Maximum levels of cross‐contamination for 24 antimicrobial active substances in non‐target feed. Part 3: Amprolium

“…In the study of Silzell et al. ( 2001 ), a total of 96 mix‐breed cattle for fattening were distributed in four dietary treatments (24 animals/treatment), each including four pens with six animals. Two controls and two treatment groups, which involved the dietary administration of amprolium (unspecified chemical form; Amprolium 1.25% Cattle Pellets; Nutra Blend Corp) at a concentration of 5 mg/kg initial body weight (BW) (equivalent to 250 mg/kg dry matter (DM), using the default value 20 g DM intake/kg BW, 8 initial BW 211 kg), with or without supplementation with thiamine at 140 mg/kg DM.…”

“…Only one study reporting the effect of oral administration of amprolium is available for cattle for fattening (Silzell et al., 2001 ), from which the concentration of 250 mg/kg DM did not show a growth‐promoting effect.…”