NEW YORK/ATLANTA – It is one of the most potent antibiotics used by U.S. cattle and dairy farmers, the key component in the top-selling drug line of Zoetis, the world’s largest animal health company.
But the strength of the antibiotic ceftiofur – and the frequency with which it’s being misused on farms across America – has created a threat to human health that may overshadow the drug’s effectiveness, a Reuters examination shows.
The U.S. Food and Drug Administration cautioned in 2012 that ceftiofur could pose a “high public health risk,” in part because the drug belongs to a class of antibiotics considered critically important in human medicine. The warning is the FDA’s strongest kind. The concern is that ceftiofur in animals could spawn antibiotic-resistant bacteria, superbugs that can infect people and defeat conventional medical treatment, even when the drug is used as directed.
A Reuters analysis of government data indicates that the risks to human health may be more significant than previously known. Since last year, records kept by the U.S. Department of Agriculture show that traces of ceftiofur were found at illegal levels in slaughtered animals more frequently than with any other drug. In 2013, ceftiofur alone accounted for one-fourth of all residue violations logged by the USDA, the data show.
The ceftiofur residues are not themselves considered dangerous to people if ingested, because the government sets its standards well below hazardous levels.
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