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Vibrio vulnificus monitoring and risk assessments

Updated 22 times since CLSTR started tracking revisions of this situation.

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2026-09-03 19:23 UTC → 2026-09-16 19:20 UTC · added ~~removed~~

Vibrio vulnificus infections and fatalities are rising across the United States and Europe, driven by warming sea temperatures. In the U.S., the Gulf Coast has seen a significant impact. Louisiana has recorded 15 cases, six of which resulted in death, exceeding its decade average of ten cases and one death per year. Notably, fourteen of these Louisiana infections resulted from exposing open wounds to seawater. Florida has reported 20 cases and four deaths across Palm Beach, Marion, Bay, and Broward counties. Alabama has reported 16 cases of vibriosis, including one fatality, while Mississippi has reported three cases. Total deaths caused by the ‘flesh-eating’ bacterium in the United States have risen to ten this year. The Louisiana Department of Health has noted that ‘nearly one in five people with a Vibrio vulnificus infection dies, sometimes just a day or two after becoming ill.’ In 2026, Florida has recorded 21 cases, with the fourth fatality involving a resident of Broward County aged 75 to 79. Health officials have linked unusual spikes in certain counties to the impacts of hurricanes Helene and Ian, noting that severe weather can create standing or floodwaters that increase exposure risks. Officials also noted that bloodstream infections caused by the bacterium are fatal approximately 50% of the time. Globally, rising ocean temperatures are expanding the bacterium’s range. In Europe, the European Centre for Disease Prevention and Control (ECDC) has identified the Baltic and Black Seas as high-risk areas during summer months. While the Italian National Institute of Health maintains that the risk in Italy remains ‘very low’ due to high salinity levels, researchers note that warming conditions favor proliferation. Health officials warn that the bacteria can enter the body through contaminated seafood or through open wounds, such as cuts, scrapes, or fresh tattoos. Symptoms can include redness, blisters, and hemorrhagic bubbles, potentially progressing to necrotizing fasciitis, sepsis, or requiring limb amputation. Experts project a potential 50% increase in annual cases by 2090.

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