A potentially deadly flesh-eating bacterium has been detected in waters across Long Island, raising urgent concerns as experts warn that infections can become fatal in as little as 48 hours.
Researchers at Stony Brook University identified multiple “hotspots” of Vibrio vulnificus—a rare but highly aggressive bacterium—in coastal areas including Sagaponack Pond, Mecox Bay, and Georgica Pond on the South Fork. The organism thrives in warm, brackish water and can enter the body through open cuts or by consuming contaminated shellfish, particularly raw oysters.
According to People, the discovery comes as temperatures begin to rise heading into peak beach season, when cases historically spike. The Cleveland Clinic notes that infections are most common between May and October and can escalate rapidly, sometimes within hours. While the bacteria are uncommon—causing roughly 100 to 200 cases annually in the U.S.—they belong to a broader family responsible for about 80,000 illnesses each year.
“It’s a very, very serious infection,” said Dr. Christopher Gobler, a marine scientist involved in the findings. “People who are infected with this bacteria have a 20% chance of dying within just 48 hours.”
He added that those with open wounds, compromised immune systems, or underlying health conditions face the highest risk, especially during the summer months.
Symptoms vary depending on how the bacteria enter the body, but often intensify quickly. Wound infections can cause swelling, pain, and blistering skin lesions, while ingestion may lead to severe gastrointestinal distress.
In more advanced cases, the infection can spread into the bloodstream, triggering sepsis, dangerously low blood pressure, and tissue destruction—sometimes requiring emergency surgery or even amputation.
Health officials also flagged a broader environmental issue: dozens of Long Island waterways are currently failing to meet safety standards due to harmful algal blooms, which can produce toxins that further contaminate shellfish and surrounding waters. Some shellfishing areas have already been shut down as a precaution.
Though treatable with antibiotics if caught early, Vibrio vulnificus infections demand immediate medical attention. Experts stress that anyone experiencing symptoms after exposure to seawater or raw seafood should seek emergency care without delay.
