A rare but deadly bacteria is making waves across Louisiana, and health officials are urging residents to take extra precautions during outdoor and coastal activities this summer.

A fast-acting bacteria known as Vibrio vulnificus has been linked to multiple severe infections and deaths across the state. The bacteria is naturally found in warm, salty or brackish waters along the Gulf Coast and can also contaminate raw or undercooked seafood, especially oysters.

This summer, infections have spiked to concerning levels. Several residents have been hospitalized, and at least four have died. What makes this bacterium particularly dangerous is how quickly it spreads through the body—often within just 24 to 48 hours—and how severe the complications can be.

How People Are Getting Sick

The bacteria can enter the body in two main ways:

• Through open cuts or wounds exposed to warm coastal water

• By eating raw or undercooked seafood, particularly shellfish

Even small scrapes or insect bites can create an entry point when swimming, fishing, or working near water. Infections that begin in the skin can spread rapidly, causing tissue damage that may lead to amputations or even death if not treated quickly.

Who’s Most at Risk

While anyone can become infected, people with underlying health conditions are especially vulnerable. Those with liver disease, diabetes, compromised immune systems, or cancer are at much higher risk for severe complications.

Common symptoms include swelling, redness, fever, and pain near the affected wound. If eaten, contaminated seafood can cause vomiting, diarrhea, and stomach cramps. In some cases, the bacteria can infect the bloodstream, resulting in low blood pressure, blistering skin lesions, and shock.

Precautions You Can Take

Health experts recommend the following steps to stay safe:

• Avoid entering salt or brackish water if you have any open wounds, including cuts, scrapes, or recent tattoos or piercings.

• Use waterproof bandages to cover skin if you’re working or playing near the water.

• Wear gloves when handling raw seafood.

• Cook seafood thoroughly, especially oysters.

• Seek medical attention immediately if you develop symptoms after water exposure or eating seafood.

Why It’s Getting Worse

Louisiana’s warm climate creates ideal conditions for this bacteria to thrive. As coastal waters warm during the summer months, the risk increases. Rising temperatures and extreme heat may be contributing to the higher-than-normal number of cases seen this year.

While these infections are still rare, they are becoming more common and more dangerous.

A Word of Caution

Outdoor activities, fishing trips, and seafood feasts are a way of life in Louisiana—but awareness and prevention are key. Whether you’re swimming, crabbing, or enjoying raw oysters, take time to protect yourself and loved ones from this growing threat.

Health officials stress that fast treatment can save lives. If you suspect an infection, don’t wait—get medical care right away.