Table 1. Overview of the study design with respect to sampling scheme to monitor antimicrobial resistance in target bacteria.

Herd type	N herds	N sample periods (intensity)	N Animals	Target bacteria (ecosystem)
Dairy herds	10	6 (every 3 months)	50%a	E. coli (digestive tract)
Beef herds	10	4 (every 6 months)	50%a	E. coli (digestive tract)
				P. multocida/M. haemolytica (respiratory tract)
Veal calves	5	2 (start and end of production cycle)	20%	E. coli (digestive tract)
				P. multocida/M. haemolytica (respiratory tract)

^a On each sample occasion 50% of animals within following age categories were sampled: 0–0.5; 0.5–1; 1–2, >2 years. E: Escherichia; P: Pasteurella; M: Mannheimia