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