" As the Mayo Clinic rather indelicately put it, “Most people are infected with Salmonella by eating foods that have been contaminated by feces.”102 How does it get there? In slaughter plants, birds are typically gutted by a metal hook, which too often punctures their intestines and can expel feces onto the flesh itself. According to the latest national FDA retail-meat survey, about 90 percent of retail chicken showed evidence of contamination with fecal matter. "

― Michael Greger , How Not to Die: Discover the Foods Scientifically Proven to Prevent and Reverse Disease