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Potentially harmful bacteria and antibiotic resistance common in 316 raw poultry samples tested

By Robert Preidt

HealthDay Reporter

THURSDAY, Dec. 19, 2013 (HealthDay News) -- Potentially harmful bacteria was found on 97 percent of chicken breasts bought at stores across the United States and tested, according to a new study.

And about half of the chicken samples had at least one type of bacteria that was resistant to three or more classes of antibiotics, the investigators found.

The tests on the 316 raw chicken breasts also found that most had bacteria -- such as enterococcus and E. coli -- linked to fecal contamination. About 17 percent of the E. coli were a type that can cause urinary tract infections, according to the study, published online and in the February 2014 issue of Consumer Reports.

In addition, slightly more than 11 percent had two or more types of multidrug-resistant bacteria.

Bacteria on the chicken were more resistant to antibiotics used to promote chicken growth and to prevent poultry diseases than to other types of antibiotics, the study found.

These findings show that "consumers who buy chicken breast at their local grocery stores are very likely to get a sample that is contaminated and likely to get a bug that is multi-drug resistant. When people get sick from resistant bacteria, treatment may be getting harder to find," said Dr. Urvashi Rangan, a toxicologist and executive director of the Food Safety and Sustainability Center at Consumer Reports.

The magazine has been testing U.S. chicken since 1998, and rates of contamination with salmonella have not changed much during that time, ranging from 11 percent to 16 percent of samples.

This is the first year that the study looked at six different bacteria. It found the following contamination rates: enterococcus (80 percent), E. coli (65 percent), campylobacter (43 percent), klebsiella pneumonia (14 percent), salmonella (11 percent) and staphylococcus aureus (9 percent).

Rangan said other countries do a better job of curbing chicken contamination. "There is no reason why the United States can't do the same," she said.

"We know especially for salmonella, other countries have reduced their rates," Rangan said. "Systemic solutions were implemented throughout the European Union. Government data show that in 2010, 22 countries met the European target for less than or equal to 1 percent contamination of two important types of salmonella in their broiler flocks."

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