‘Not normal:' Deaths from flesh-eating bacteria are on the rise in parts of the U.S.

Deaths from “flesh-eating” bacteria are on the rise across the southeastern coasts of the U.S. At least five people in Florida, four in Louisiana and one in the Outer Banks have died this year from infections that can cause necrotizing wounds.

The culprit, the bacteria Vibrio vulnificus, thrives in warm seawater.

Florida has seen 16 cases this year, according to the state’s health department. Seventeen cases have been reported in Louisiana — more than previous years’ annual averages.

North Carolina has seen seven cases this year so far, the state Department of Health and Human Services confirmed to NBC News. And Mississippi has had three cases so far this year, the state’s health department says.

Initial deaths from the infection in Florida were reported in counties spread around the s