Cutting boards used to prepare raw poultry may be an important source of drug-resistant bacteria in hospital kitchens and private homes, according to a new study.
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The more bacteria are exposed to antibiotics, the higher the chance they will develop resistance to the drugs. Unnecessary exposure can happen in humans who take antibiotic drugs they don’t need, like for the common cold, which is caused by a virus and not affected by antibiotics. It can also happen when large numbers of livestock are given feed laced with antibiotics to help them grow faster and larger.

According to the World Health Organization, 75 percent of antibiotics sold are destined for use in animals.