WILMINGTON, Del. (AP) — Researchers worry that infections from sometimes-deadly bacteria could become more prevalent as global warming continues.

The News Journal of Wilmington, Delaware, reported Sunday that naturally occurring Vibrio bacteria are found in brackish coastal waters. Vibrio multiplies dangerously in warm water.

Infections are considered to be rare. About 27 people in the U.S. die from it each year. But cases have been on the rise. There were more than 1,200 infections and 34 deaths reported in 2014.

Eating raw oysters contaminated by the bacteria can lead to Vibrio infections. The bacteria can also enter a cut or wound on the skin. One man was infected while catching crabs.

Vibrio can cause an extremely irritated cut or stomach. For people with underlying health problems, it can lead to amputations and death.

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Information from: The News Journal of Wilmington, Del., http://www.delawareonline.com