Five people died from infection with a bacteria known as Vibrio vulnificus, also called “flesh-eating”, in the state of Louisiana, United States, in 2026. The information was released by state health authorities on August 6, 2026. There were nine cases of the disease in total, with all patients requiring hospitalization due to the severity of the condition.
Understand the threat of the bacterium Vibrio vulnificus
Vibrio vulnificus is one of around twelve species of Vibrio capable of causing the disease known as vibriosis. However, it is considered the most serious and potentially fatal among them, according to data from the US Centers for Disease Control and Prevention (CDC). Approximately one in five people who contract Vibrio vulnificus die, and the infection can even lead to amputations.
On the same topic: Authorities confirm five deaths from flesh-eating bacteria in Louisiana
Vibrio infections are most common between the months of May and October, a period when ocean water temperatures reach their highest levels. Contamination can occur through exposure of open wounds to seawater or through consumption of raw or undercooked seafood, especially oysters.
Deaths in Louisiana exceed state’s historical average
The five deaths recorded in Louisiana in 2026 already equal the total number of deaths in 2025, when the state recorded 26 cases of the disease. This number of fatalities is significantly higher than the state’s annual average over the past ten years, which was one death for seven cases per year. The intensification of cases raises an alert for local public health.
In a similar scenario, the Florida Department of Health also reported two deaths from Vibrio vulnificus this year. In 2024, the neighboring state recorded 19 deaths, and five more in 2025. Florida’s health agency noted that infection rates increased after major storms, such as Hurricane Helene in 2024, which brought flooding and water accumulation.
Climate change and the expansion of the risk of infection
The rise in seawater temperatures, a phenomenon directly linked to global climate change, is pointed out by experts as a decisive factor in the expansion of the risk of Vibrio vulnificus infections to new regions. This warming favors the survival and proliferation of bacteria in environments previously considered unfavorable, changing geographic patterns of disease occurrence. The implications are serious for public health, requiring a reevaluation of surveillance and prevention strategies in areas that have not historically faced this threat.
More on this story: Cases of flesh-eating bacteria in water are growing and expert warns swimmers in the USA
A concrete example of this worrying trend was the detection of Vibrio vulnificus in water samples collected in coastal areas of Long Island, New York, in the spring of this year. The discovery, at a more northern latitude, demonstrates how the bacteria’s habitat is expanding. This signals that communities in temperate regions may need to prepare to deal with infections that were previously predominantly seen in warmer climates, reinforcing the urgency of considering the impacts of climate change on the epidemiology of infectious diseases.
Who is most vulnerable and what are the detailed symptoms
Individuals with certain underlying health conditions face a significantly increased risk of developing severe or fatal complications when infected with Vibrio vulnificus bacteria, as warned by the Louisiana Department of Health. The most vulnerable group includes cancer patients, people with chronic liver disease, people with HIV, individuals with thalassemia and those undergoing immunosuppressive treatments. For these patients, the body’s response to infection may be compromised, making maximum precaution essential.
Learn more: Nail biting infection leads young man to urgent surgery to avoid amputation
- The manifestation of symptoms can vary widely, depending on how the bacteria enters the body and which part of the body is affected. It is essential to pay attention to the signs to seek medical attention quickly. The main types of infection and their respective symptoms are:
- Wound infection: Characterized by fever, changes in skin color (which may become reddish or dark), presence of secretion or pus in the wound, in addition to intense pain and progressive swelling around the wound.
- Bloodstream infection: Considered more serious, it manifests itself with high fever, intense chills, a dangerous drop in blood pressure and the appearance of widespread skin lesions.
- Gastrointestinal symptoms: When infection occurs through ingestion, signs include persistent diarrhea, severe stomach cramps, nausea, and episodes of vomiting.
Guidelines to avoid infection and protect yourself
To reduce your risk of contracting Vibrio vulnificus, the Louisiana Department of Health offers some important recommendations. The public should avoid entering salt or brackish waters, which are areas where fresh and salt water mix. This measure is crucial, especially for those who have open wounds.
Other precautions include washing wounds thoroughly with soap and running water after possible exposure to seawater. When preparing seafood, it is essential to cook it thoroughly to eliminate any bacteria present. Additionally, always keep cooked seafood separate from raw seafood to avoid cross-contamination, thus protecting everyone’s health.