Fig 2. Prevalence of broiler chickens with (A) ESBL- and (B) pAmpC- producing E. coli throughout the different trials (control group, increased litter, reduced stocking density (reduced stocking) and alternative breed).

See = seeder-birds, Sen = sentinel-birds; sampling 1 = 24 h post-inoculation, 2 = 72 h post-inoculation, 3–5 = 2^nd week of trial, 6–7 = 3^rd week of trial, 8–9 = 4^th week of trial, 10–11 = 5^th week of trial, 12–13 = 6^th week of trial.