In the ABC News investigation, McGill University researchers said their research suggests drug-resistant E. coli in chickens may be transferred to humans and manifesting as the hard-to-treat bladder infections.

"What this new research shows is, we may in fact know where it's [the antibiotic-resistant bladder infections are] coming from. It may be coming from antibiotics used in agriculture," Maryn McKenna, a reporter for Food & Environment Reporting Network, which conducted the investigation with the network, told ABC News.
However, the National Chicken Council said that there is no proof that the drug-resistant bacteria that cause bladder infections actually came from the chickens. The council said in a statement:
"The studies in question make the assumption that humans carrying these E. coli acquired them from poultry. The strains did not originate in poultry and likely entered these farms from sources originating in human communities. Perhaps most importantly, the potential transmission of antibiotic resistant E. coli to humans says nothing about why these E. coli are antibiotic resistant in the first place. The resistances observed in these E. coli are common globally and are unlikely to be attributed to chickens given the few antibiotics available for use in poultry in the U.S." McGill University researchers had previously reported in the journal Emerging Infectious Diseases that the E. coli in the chicken was much more genetically related to those of human urinary tract infections, compared with the E. coli in the beef and pork. That study included E. coli testing of 320 samples of beef, pork and chicken.
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