Health experts are raising concerns about a potential increase in infections caused by Vibrio vulnificus, a dangerous bacteria often called “flesh-eating,” as coastal water temperatures rise ahead of the summer season. This warning comes after early-season cases were reported along the East Coast, including five confirmed cases in Florida and one in Connecticut. On the West Coast, health agencies in California are also monitoring the bacteria, as the state records a small number of Vibrio vulnificus infections each year.
The Centers for Disease Control and Prevention (CDC) estimates that various Vibrio species cause approximately 80,000 illnesses in the United States annually. However, the specific strain of Vibrio vulnificus is responsible for around 100 to 200 of these cases each year.
Vibrio vulnificus is known for causing necrotizing fasciitis, a severe condition where tissue surrounding an open wound begins to die. The bacteria naturally resides in coastal waters and typically infects humans when an open wound, recent piercing, or tattoo is exposed to seawater. However, most infections occur after consuming raw or undercooked shellfish, particularly oysters, which can concentrate the bacteria.
Symptoms usually appear within 24 hours of exposure. According to the CDC, common signs of infection include fever, chills, stomach cramps, nausea, vomiting, and watery diarrhea. If the bacteria enters the bloodstream, it can lead to blistering skin lesions and dangerously low blood pressure. Wound infections are often marked by pain, swelling, redness, discoloration, and discharge.
While anyone can contract the bacteria, certain underlying medical conditions significantly increase the risk of severe complications. The CDC lists liver disease, cancer, diabetes, HIV, thalassemia, and recent stomach surgeries as primary risk factors. Individuals undergoing immune-suppressing therapies or taking medications that reduce stomach acid levels are also at higher risk.
Early diagnosis of Vibrio vulnificus can be effectively treated with antibiotics. However, advanced infections may require aggressive medical interventions to prevent the spread of tissue death.
According to the Cleveland Clinic, treatment options can include surgical debridement to remove dead tissue, draining fluid from skin blisters, or amputation of affected limbs in severe cases. Although infections typically peak between May and October when coastal waters are warmest, health officials stress that preventative measures should be taken throughout the year.
Medical experts recommend avoiding raw or undercooked shellfish and keeping raw seafood separate from cooked food to prevent cross-contamination. It is essential to wash hands thoroughly after handling raw shellfish.
Individuals with open wounds or skin breaks are advised to avoid seawater and brackish water, or to use waterproof bandages if exposure is unavoidable. Any wounds that come into contact with coastal water or raw seafood juices should be washed immediately with soap and clean water.
