The Louisiana Department of Health issued an advisory on August 7, 2026, advising residents to exercise caution due to an increase in the number of severe infections with the bacteria Vibrio vulnificus, known to cause tissue necrosis.
This year, Louisiana has already recorded nine cases of the disease, resulting in five deaths. This total represents a significant increase compared to the average of previous years, which was seven cases and just one death in the same period.
According to information from the Louisiana Department of Health, all nine recorded infections originated from wounds that came into contact with seawater. Additionally, all affected individuals had underlying health conditions.
Vibrio bacteria are a natural phenomenon in coastal regions with warmer waters, being most abundant between May and October. Infection can happen through open wounds coming into contact with salt or brackish water, or through eating raw or insufficiently cooked seafood, such as oysters, the state health agency explained.
Health authorities have warned that the disease caused by Vibrio can cause severe gastrointestinal problems, wound infections and even septicemia, a high-risk condition.
Certain varieties, such as Vibrio vulnificus, are capable of causing extremely serious infectious conditions with a high risk of death. In critical situations, patients may need intensive treatment or even the amputation of a limb, health authorities highlighted. It is estimated that approximately 20% of people infected with Vibrio vulnificus die, sometimes within just one or two days after the first symptoms appear.
It is essential that people seek medical assistance without delay if a wound that has had contact with brackish or salt water shows signs such as redness, swelling, pain, heating or a change in color. In these cases, it is crucial to inform the healthcare professional about the exposure to water.
