In a recent publication in Applied and Environmental Microbiology we have shown that the fecal microbiota composition is determined by the origin in the gut. These observations may help to understand the abrupt changes in pathogen shedding from chickens. This information will be important for preventing the entering and spread of pathogens in the human food chain.
Read more in Abrupt temporal fluctuations in the chicken fecal microbiota are explained by its gastrointestinal origin by Sekelja M, Rud I, Knutsen SH, Denstadli V, Westereng B, Næs T, Rudi K. Appl Environ Microbiol. 2012 Apr;78(8):2941-8.