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Muskrats are semi-aquatic rodents prized for their musk - a strong-smelling substance produced by specialised glands - which can be used in perfumes, cosmetics and medicines.

Now Ki Keun Kim and colleagues at Pusan National University, South Korea, have found that the animal produces another useful by-product.

The Pusan team claims that muskrat excrement contains a potent antibiotic that can kill the Salmonella bacteria that are a common cause of food poisoning, as well as the Vibrio bacteria that cause seafood-linked food poisoning.
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