Materials and Methods—One-day-old broilers were assigned to rear in organic or conventional farms.
In both farms, samples were taken 3 times at 1, 20, and 40 days of chicken’s age and collected from 4
sources: (1) chickens (by cloacal swabs), (2) drinking water, (3) feed, and (4) floor. In each time of sample
collection, 40 samples were taken for each source resulting in a total of 960 samples. Then, all samples
were cultured for determining the presence of Campylobacter. Prevalence of Campylobacter contamina- tion was determined and the results were compared between organic and conventional farms. In addition,
at the end of the experiment, Campylobacter enumeration was determined from cecal contents of the
chickens (n = 25/group).