Warm Waters Bring Danger: The Rise of a Deadly Bacteria

A dangerous bacteria, Vibrio vulnificus, is making a comeback. It's a germ that loves warm, low-salt water and can cause a serious illness called vibriosis. This bacteria is not new, but it's becoming more common, and experts are worried. Vibrio vulnificus is often found in brackish waters, where fresh and saltwater mix. People can get infected by eating raw or undercooked shellfish or by getting warm, low-salt water into an open wound. This bacteria is especially concerning because it can be deadly. About 1 in 5 people who get infected with this bacteria die, sometimes within just a day or two of getting sick. The bacteria is known to cause a condition called necrotizing fasciitis, which is often referred to as a "flesh-eating" disease. This means the bacteria can attack the soft tissue under the skin, leading to severe damage and even amputations in some survivors. In the past, vibriosis was mostly associated with the Gulf Coast. However, in recent years, cases have been popping up further north along the East Coast. For example, in 2025, Massachusetts saw 71 cases of vibriosis. While no one died from these infections, 30% of those infected needed to be hospitalized. Experts believe that rising temperatures and warming seas are contributing to the increase in Vibrio vulnificus infections. As the planet warms, the conditions that this bacteria thrives in become more common. This means that infections are likely to become more frequent in the future. So, what can be done to protect yourself? Experts recommend avoiding warm water swimming if you have an open wound. It's also a good idea to avoid eating raw shellfish and to take steps to prevent cross-contamination. By being vigilant and taking these precautions, you can lower your risk of getting infected with this dangerous bacteria.