‘Flesh Eating’ Bacteria Warning Issued Ahead of Fourth of July Beach Weekend as Deadly Infections Raise Concern

Millions of Americans planning to spend the Fourth of July weekend at beaches along the Atlantic Coast are being urged to take extra precautions after health officials warned that Vibrio vulnificus, a rare but potentially deadly bacterium often referred to as “flesh-eating bacteria”—may be present in warm coastal waters.

Officials are not telling people to avoid the beach, but they are warning that even a small cut or scrape could become dangerous if exposed to contaminated saltwater or brackish water. While infections are uncommon, they can progress rapidly and become life-threatening without prompt medical treatment.

Health Officials Warn Beachgoers to Protect Open Wounds

The warning comes as millions of Americans head to beaches, bays, and coastal parks during one of the busiest holiday weekends of the year.

Earlier this year, officials in Southampton, New York, cautioned residents and visitors that Vibrio vulnificus naturally occurs in warm coastal and estuarine waters during the summer months. The presence of the bacteria does not indicate pollution or unsafe beaches, but officials urged anyone with open wounds, recent surgical incisions, tattoos, piercings, or fresh cuts to avoid exposing those areas to seawater. The bacteria thrive in warm temperatures, making the risk highest between May and October, when coastal waters become warmer.

Why Vibrio vulnificus Is So Dangerous

Most people who swim in the ocean will never become seriously ill. However, if Vibrio vulnificus enters the body through an open wound, the infection can spread with alarming speed. According to the U.S. Centers for Disease Control and Prevention (CDC), approximately 80,000 cases of vibriosis occur in the United States each year. Many infections are linked to eating raw or undercooked shellfish, particularly oysters, but serious cases can also occur after exposure to contaminated coastal water through broken skin.

The CDC warns that about one in five people who develop severe Vibrio vulnificus infections die, sometimes within just one or two days after symptoms begin. In severe cases, patients may require intensive care, emergency surgery, or even limb amputation to stop the infection from spreading.

Symptoms Can Develop Quickly

Health experts urge people to seek immediate medical attention if they develop symptoms after swimming in coastal waters or handling raw seafood.

Warning signs include:

• Fever and chills
• Increasing pain around a wound
• Redness and swelling
• Warmth around the affected area
• Skin discoloration
• Blisters or fluid draining from the wound. If the bacteria enter the bloodstream, patients may experience dangerously low blood pressure, blistering skin lesions, and other life-threatening complications. Doctors recommend informing healthcare providers about any recent exposure to coastal water or raw shellfish, as early diagnosis can significantly improve outcomes.

Researchers Say Warmer Waters Increase Risk

Scientists have also been monitoring the bacteria in waters around Long Island. Researchers at Stony Brook University say warming coastal temperatures, heavy rainfall, and changing salinity levels create conditions that allow Vibrio vulnificus to multiply more easily. Algal blooms can also contribute to higher bacterial concentrations in some areas.

Even so, researchers stress that the overall risk to the average swimmer remains low. Christopher Gobler of Stony Brook University said simple precautions—such as avoiding swimming with open wounds and covering cuts with waterproof bandages—can significantly reduce the chance of infection.

Some People Face Greater Risk

Health officials say severe infections are more likely among people with:

• Liver disease
• Diabetes
• Weakened immune systems
• Chronic medical conditions
• Medications that reduce stomach acid
• Older age. These individuals are also advised to avoid eating raw oysters or other undercooked shellfish.

Florida Continues to Report Serious Cases

Florida has experienced repeated Vibrio vulnificus infections in recent years.

State health officials reported 82 cases and 19 deaths in 2024, followed by 33 cases and five deaths in 2025. Officials linked the increase in 2024 partly to flooding and environmental changes following Hurricane Helene.

Recent Case Shows How Fast Infection Can Spread

A recent case in Mississippi highlights how quickly the bacteria can become dangerous. Steve Wilson, a 50-year-old man from Hancock County, was hospitalized after contracting Vibrio vulnificus following time in coastal waterways. According to his wife, what appeared to be a minor wound or insect bite on his foot rapidly developed into a serious infection requiring emergency medical care.

Health experts say cases like this underscore the importance of seeking treatment immediately when symptoms appear.

Early Treatment Saves Lives

Although severe Vibrio vulnificus infections are extremely serious, doctors emphasize that they can be treated, especially when recognized early. The CDC recommends prompt treatment with antibiotics for severe infections, and patients may also require surgery to remove infected tissue. Early medical intervention greatly improves the chances of recovery.

Waiting to see whether symptoms improve on their own can allow the infection to spread rapidly.

Safety Tips for Holiday Beachgoers

Experts recommend taking a few simple precautions before heading to the beach this holiday weekend:

• Avoid entering saltwater or brackish water with open cuts or wounds.
• Cover minor wounds with waterproof bandages if water exposure cannot be avoided.
• Wash any cuts thoroughly with soap and clean water after leaving the beach.
• Wear water shoes around rocks, shells, and fishing areas.
• Avoid eating raw or undercooked oysters if you have liver disease or a weakened immune system.