Fig. 2

Mean number of TAB for each sampling site, when sampling with a cloth. Mean number of TAB in log₁₀ CFU/100 cm², measured on sampling site one to ten on the floor of a pig pen, after scraping (pink triangle) and after high-pressure washing with cold water (blue circle). Each sample site measured 10 × 10 cm. The initial amount of TAB in the slurry was 8.8 ± 0.1 log₁₀ CFU