Figure 3

Campylobacter concentrations in 23 sentinel samples in the carvacrol/organic acids (CR-OA) group, respectively. Carvacrol was continuously applied via feed and organic acids via drinking water. (a) Campylobacter concentrations in cloacal swabs taken from sentinel broilers (log10 most probable number (MPN)/cloacal swabs). (b) Campylobacter concentrations in cecal and colonic contents of sentinels after dissection (log10 MPN/g) 34 dph. Control group (▭); experimental group treated with carvacrol and organic acids (▬). The box plots show the 5th and 95th percentiles (whiskers) and outliers (●). Medians (bold lines) and significance levels (p values) between groups as determined by the Mann–Whitney U test are shown (*p < 0.05, **p < 0.01, ***p < 0.001).