Map Shows Flesh-Eating Bacteria Cases Across the US in 2026

At least four states have reported cases of a dangerous type of bacteria called Vibrio vulnificus in 2026. This germ is sometimes called "flesh-eating bacteria" because of the serious damage it can do inside the body. Florida, Alabama, Connecticut, and Mississippi have all reported infections this year. Health officials warn that the real number of cases across the country is probably much higher, since many infections are never diagnosed or reported.

Scientists say that for every case of vibriosis that gets reported, more than 140 infections may go undetected. That means the official numbers only show a small part of the full picture. The bacteria can cause severe illness, and health experts are urging people in affected states to take precautions near warm coastal waters.

Over the past five years, the CDC tracked 727 confirmed cases of Vibrio vulnificus across the United States. Of those patients, 87 percent had to be hospitalized, and about 20 percent died from the infection. Florida had the highest number of reported cases during that period, making it an important state to watch.

Florida once again leads the nation in reported cases for 2026. State health data showed 12 confirmed infections and one death as of late July. Cases were spread across nine counties, including Miami-Dade, Palm Beach, and Hillsborough.

Alabama reported its first vibriosis case of the year in April, through the Mobile County Health Department. Officials did not say exactly which type of Vibrio bacteria caused the infection. Connecticut reported a case in February that was linked to oysters that came from outside the state. Mississippi reported seven Vibrio infections by July, including one caused by Vibrio vulnificus, with no deaths recorded.

Experts believe that rising ocean temperatures are causing the bacteria to spread to new areas. Dr. William Schaffner, a professor at Vanderbilt University Medical Center, explained that Vibrio vulnificus grows best in brackish water, which is a mix of saltwater and freshwater. He said that as ocean waters have gotten warmer, the bacteria has moved north from the Gulf Coast all the way to New England.

People can get infected with Vibrio vulnificus in two main ways. The first is by swimming or wading in warm coastal water when they have an open cut or wound on their body. The second is by eating raw or undercooked shellfish, especially oysters. Dr. Schaffner said wound infections can be especially dangerous because the bacteria spreads quickly beneath the surface of the skin.

One tricky thing about this infection is that it can be hard to spot at first. The skin on the outside may not look very red or swollen, even as the bacteria destroys muscle underneath. Dr. Schaffner said the most noticeable warning sign is often severe, unexplained pain. If the infection gets into the bloodstream, it can cause septic shock, blistering skin sores, and other life-threatening problems.

Some people face a much higher risk of getting seriously ill than others. People with chronic liver disease, cancer, diabetes, or weakened immune systems are most likely to develop life-threatening symptoms. Health officials say that people with these conditions should be especially careful to avoid eating raw oysters, since the bacteria can travel from shellfish into the bloodstream.

There are simple steps everyone can take to stay safe near the water. The CDC and state health agencies say people should keep open wounds out of saltwater or brackish water, and rinse off thoroughly with clean water after swimming. Anyone who notices unexplained pain under the skin, or a wound that looks red, swollen, or tender, should see a doctor right away. As Dr. Schaffner put it, a little careful prevention can help make sure a beach trip stays fun and safe.