Deciphering the Association between Campylobacter Colonization and Microbiota Composition in the Intestine of Commercial Broilers.

Campylobacter is a major food safety concern and is transmitted mainly via poultry meat. We previously found that some commercial broiler farms consistently produced Campylobacter -negative flocks while others were consistently Campylobacter -positive for consecutive production cycles although the farms operated under similar management practices. We hypothesized that this difference in Campylobacter colonization might be associated with the gut microbiota composition. To address this, six commercial broiler farms were selected based on their Campylobacter status (three negative and three positive) to evaluate the microbiota differences between each farm category. For each farm on each production cycle (2-3 cycles), 40 ceca collected from five-week-old broilers were processed for microbiota analysis via 16S rRNA gene sequencing. Cecal microbiota species richness, phylogenetic diversity, community structure, and composition of Campylobacter -positive farms were noticeably different from those of Campylobacter -negative farms. Rikenella , Methanocorpusculum , Barnesiella , Parasutterella , and Helicobacter were significantly more abundant among Campylobacter -positive farms. In contrast, Ruminococcaceae , Streptococcus , Escherichia , Eggerthellaceae , Lactobacillus , Monoglobus , and Blausia were more abundant in Campylobacter -negative farms. Eggerthellaceae , Clostridia , Lachnospiraceae , Lactobacillus , Monoglobus , and Parabacteroides were significantly negatively correlated with Campylobacter abundance. These findings suggest that specific members of cecal microbiota may influence Campylobacter colonization in commercial broilers and may be further explored to control Campylobacter in poultry.