Louisiana health officials warned residents on Thursday after nine Vibrio vulnificus infections and five deaths were reported in the state this year. The warning came after a surge that has already pushed the toll far above what Louisiana usually sees in the same stretch of the year.
The Louisiana Department of Health said the state averaged seven cases and one death annually over the previous 10 years during the same time period. This year’s numbers are a sharp break from that pattern, and they are why the notice landed now instead of waiting for the usual summer cautionary reminders.
All of this year’s reported cases were tied to wounds exposed to seawater, and all of the patients had underlying health conditions. That combination matters because Vibrio bacteria live naturally in coastal waters, become more common as water temperatures rise, and can turn a small cut into a severe infection fast.
But seawater is only part of the danger. People can also contract the infection by eating raw or undercooked shellfish, particularly oysters, even though the cases Louisiana highlighted this week were linked to open wounds. The overlap between those two routes makes the warning harder to ignore: the same bacteria can enter through a scrape in the water or through food on the plate.
People with liver disease, cancer, diabetes, HIV or thalassemia are among those most at risk, along with people undergoing immune-suppressing treatment, people taking medication that reduces stomach acid and people who recently had stomach surgery. About 1 in 5 people with a Vibrio vulnificus infection die, which is one reason the department is urging quick action when symptoms appear.
The department said residents should seek medical care immediately if a wound exposed to brackish or salt water becomes red, swollen, painful, warm or discolored. Louisiana saw a similar spike in Vibrio infection last year, when at least 17 cases were reported in the state and at least 10 people in Florida, Louisiana and the Outer Banks of North Carolina died from the infection. The state’s latest warning suggests the problem is not a one-off flare-up, but part of a pattern that keeps returning with warm water and exposed wounds.
