Raw oysters, open cuts and beach visits: Florida’s latest ‘flesh-eating’ bacteria deaths raise concerns for people heading outdoors — how to avoid Vibrio infection

Florida’s latest deaths linked to Vibrio vulnificus have renewed attention on a rare but potentially life-threatening infection associated with raw oysters, warm coastal water and exposed wounds.

The bacterium is often described in headlines as a “flesh-eating” bacteria.

That label refers to the severe tissue damage it can cause in some infections. It does not mean the organism literally eats flesh, and most people who visit the beach will not develop this illness.


Also Read | AM radio could soon return to every new car in America — here’s what the House bill means for car buyers, emergency alerts and electric vehicles

The risk becomes more serious for people with certain underlying health conditions, particularly when contaminated seafood is eaten or an open wound comes into contact with seawater.

Florida records a fourth death as Vibrio cases continue

Florida has confirmed its fourth death from Vibrio vulnificus in 2026, according to a report published by WTSP on September 17.

The latest fatality involved a Broward County resident aged between 75 and 79.

The Florida Department of Health had reported 21 confirmed infections statewide, according to reporting on September 16.

The deaths have occurred in different parts of the state. Earlier fatalities included residents of Bay, Palm Beach and Marion counties, while the latest death was reported in Broward County.

Also Read | A rooftop sniper, missing security measures and a grieving family: Could Charlie Kirk’s assassination have been prevented? Family raises new questions

These cases do not establish that a single contaminated food product or beach caused the infections.

The source of the latest infection was not known at the time of reporting. That distinction matters because Vibrio vulnificus can enter the body in more than one way.

Florida’s history shows how sharply the number of infections can change from one year to another. The state recorded 82 cases and 19 deaths in 2024, while 2025 saw 33 cases and five deaths. Hurricane-related flooding was associated with the unusually high 2024 figures.

For people planning beach trips, seafood meals or outdoor activities, the central question is not whether every coastal area is dangerous. It is how to reduce exposure and recognise a serious infection early.

Why raw oysters and warm seawater can become a health risk

Vibrio vulnificus occurs naturally in coastal waters, especially warm, brackish environments where freshwater mixes with seawater. The organism can also be found in shellfish, including oysters.

Eating raw or undercooked oysters is one of the recognised ways people become infected.

The bacteria can be present in shellfish without changing its smell, taste or appearance, so a normal-looking oyster is not proof that it is safe.

The second major route involves damaged skin. A person with a cut, scrape, blister or other open wound can become infected when that wound is exposed to water containing the bacteria.

This can happen during ordinary activities:

•Swimming in coastal water.

•Wading near the shore.

•Fishing or handling marine animals.

•Cleaning seafood.

•Walking barefoot where a foot injury could come into contact with contaminated water.

The risk is not limited to people who deliberately enter the ocean. A small injury sustained while outdoors can become an entry point for bacteria if it is exposed to contaminated water.

Warm weather is relevant because Vibrio bacteria thrive in warmer coastal conditions. However, temperature alone does not tell anyone whether a particular beach or oyster is contaminated.

Who faces the greatest danger from a Vibrio infection?

A healthy person can contract Vibrio vulnificus, but severe illness is more likely among people with certain medical conditions.

The Florida Department of Health identifies several important risk factors, including:

•Chronic liver disease or cirrhosis.

•Diabetes.

•Cancer.

•HIV.

•Kidney disease.

•A weakened immune system.

People with chronic liver disease are of particular concern because the infection can spread into the bloodstream and cause sepsis. Bloodstream infections can be fatal in about half of cases.

That does not mean every person with one of these conditions will become seriously ill after visiting the beach. It does mean they should take water and seafood precautions more seriously.

The infection can also affect people without known health problems. A person who develops a rapidly worsening wound infection after swimming should not assume that being otherwise healthy rules out danger.

What symptoms should people watch for?

The symptoms depend on how the bacteria entered the body.

After eating contaminated shellfish, possible symptoms include:

•Diarrhoea.

•Vomiting.

•Abdominal pain.

•Stomach cramps.

After exposure through an open wound, symptoms may include:

•Increasing redness or swelling.

•Pain around the wound.

•Skin discolouration.

•Blisters.

•Fever or chills.

A serious infection can progress to bloodstream infection, low blood pressure and septic shock. Severe wound infections may also involve rapidly spreading tissue damage.

The warning signs are especially important when symptoms appear soon after seafood consumption or seawater exposure.

Anyone with a rapidly worsening wound, fever, chills or signs of serious illness should seek urgent medical care. Tell the clinician about any recent oyster consumption or coastal water exposure.

How to avoid Vibrio infection during beach trips and seafood meals

There is no need for most people to avoid every beach or stop eating seafood. The more useful approach is to reduce the specific exposures that allow Vibrio vulnificus to enter the body.

1. Skip raw oysters if you are at higher risk
2. Keep open wounds away from coastal water
3. Be careful after storms and flooding
4. Do not delay medical care when symptoms worsen

Frequently asked questions about Vibrio vulnificus

1. Can you get Vibrio from swimming at the beach?

Yes. Vibrio vulnificus can enter the body through an open wound exposed to contaminated coastal or brackish water. People with unbroken skin are at lower risk of this route of infection, but swimming water cannot be assumed to be free of bacteria.

2. Are raw oysters the only way to get Vibrio?

No. Raw or undercooked shellfish is one route, but the bacteria can also enter through cuts and other open wounds exposed to contaminated seawater.

3. Who should be most careful about Vibrio?

People with chronic liver disease, diabetes, cancer, kidney disease, HIV or weakened immune systems face a higher risk of severe infection. People with these conditions should avoid raw or undercooked shellfish and take precautions around coastal water.

4. What should you do if a wound gets worse after swimming?

Seek prompt medical care, especially if the wound becomes rapidly more painful, swollen or discoloured, or if you develop fever or chills. Tell the clinician about the seawater exposure. Severe Vibrio vulnificus infections can progress quickly and require urgent treatment.