Vibrio vulnificus cases are rising across Florida, with 12 infections and one death reported during the 2026 summer season.
The latest infection was recorded in Bay County, adding to cases reported across several areas of the state. Florida recorded 33 cases and five associated deaths during 2025.
Cases typically become more likely during the summer, when warmer coastal waters favor bacterial growth and participation in swimming, boating, fishing, and shellfish consumption increases. Although infection remains uncommon, severe illness can progress within hours and may become fatal within one or two days.
How V. vulnificus Infection Occurs
V. vulnificus occurs naturally in saltwater and brackish water, where seawater and fresh water mix. Infection can develop when an open cut, scrape, or other wound is exposed to contaminated water.
The bacterium may also be acquired through the consumption of raw or undercooked shellfish, particularly oysters. Exposure does not result in severe illness for most healthy individuals, but clinical vigilance is important because invasive infections can deteriorate rapidly.
People who are immunocompromised or have open wounds should avoid entering waters where infections have been reported.
V. vulnificus Symptoms Depend on Exposure
Symptoms following contaminated seafood consumption may include watery diarrhea, abdominal cramping, nausea, vomiting, fever, and chills.
Wound infections may present with redness, pain, tenderness, swelling, warmth, skin discoloration, drainage, or fever. These infections can worsen quickly and develop into necrotizing fasciitis, which destroys tissue beneath the skin. This complication has led to V. vulnificus being described as a flesh-eating bacterium, although multiple bacterial species can cause necrotizing fasciitis.
Underlying Conditions Increase Severe Illness Risk
Anyone can contract Vibrio bacteria, but severe complications are more likely among people with liver disease, weakened immune systems, or other chronic medical conditions. Early recognition and treatment are therefore critical when a rapidly progressing wound infection follows coastal water exposure.
Preventive measures include keeping open wounds away from saltwater and brackish water or covering them with waterproof bandages. Wounds exposed to seawater should be washed thoroughly with soap and clean water.
Consumers should also avoid raw or undercooked oysters and other shellfish. Clinicians should remain alert following tropical storms or hurricanes, when seawater may be displaced into new areas and exposure opportunities may increase.
Reference
Gibbs A. Flesh-eating bacteria cases grow in Florida—what are the symptoms? 30 July 2026. Available at: https://www.msn.com/en-us/health/diseases-and-conditions/flesh-eating-bacteria-cases-grow-in-florida-what-are-the-symptoms/ar-AA294RSe. Last accessed: 31 July 2026.
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