August 29, 2025 — Health officials are warning of a sharp rise in infections caused by Vibrio vulnificus, a rare but dangerous bacteria often nicknamed “flesh-eating.” The surge has been tied primarily to the consumption of raw oysters and direct exposure to warm coastal waters.
Increasing Cases and Deaths
Louisiana recently confirmed two more deaths linked to the bacteria, bringing the state’s toll this year to six. With more than 30 confirmed infections in 2025 alone, officials say these numbers are the highest the state has recorded in over a decade. Florida has also reported over 20 cases and at least five deaths, underscoring the regional spread of the outbreak.
A Seasonal and Spreading Threat
Vibrio vulnificus thrives in warm, brackish waters, making summer and early fall the most dangerous months. Rising ocean temperatures are now extending the bacteria’s reach farther north along the U.S. coastline, putting more states at risk than ever before.
How People Get Infected
The bacteria infects people in two main ways:
- Through food: Eating raw or undercooked oysters and other shellfish can cause severe gastrointestinal illness and even bloodstream infections.
- Through wounds: Even minor cuts exposed to contaminated water can develop rapidly spreading skin infections that may require surgery or even amputation.
Fatality rates remain high—between 20 and 50 percent in severe cases—with symptoms often escalating within days.
Who Is Most at Risk
While anyone can be infected, individuals with weakened immune systems, chronic liver disease, or other serious health conditions are far more vulnerable. For these groups, the risk of developing life-threatening complications is significantly higher.
Safety Measures
Experts recommend avoiding raw shellfish, cooking seafood thoroughly, and keeping open wounds away from coastal waters. If symptoms such as fever, severe pain, or unusual skin lesions appear after oyster consumption or seawater exposure, immediate medical attention is critical.
The Bottom Line
The rise in Vibrio vulnificus infections is a stark reminder of how climate change and warming seas are creating new public health threats. While oysters remain a beloved delicacy, officials stress that the risks should not be underestimated—especially for those with existing health conditions.
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