URGENT UPDATE: Massachusetts public health officials have issued a critical warning after a swimmer on Cape Cod contracted a rare and potentially deadly infection caused by the Vibrio vulnificus bacteria. The infection was confirmed last week in an “older individual” who had an open wound while swimming at Old Silver Beach in Falmouth.

Health authorities are stressing the importance of caution as the summer season heats up. While Old Silver Beach remains open, officials highlight that infections from this bacteria are “extremely uncommon.” However, the presence of Vibrio vulnificus in coastal waters poses a serious risk, especially to vulnerable populations.

“This is a reminder that Cape Cod’s beaches are vital to our community and economy,” said Scott McGann, health agent for the Town of Falmouth. “By taking simple precautions, everyone can continue to enjoy them safely.”

As of now, there have been seven confirmed cases of Vibrio vulnificus reported in Massachusetts over the past several years, with four cases likely linked to local exposure. Infections are more frequently recorded in warmer waters, particularly along the Gulf Coast, where Vibrio bacteria thrive.

Public Health Commissioner Robbie Goldstein explained, “Heat waves and elevated water temperatures create optimal conditions for Vibrio to grow, making May through October the peak season for these bacteria.” People with open wounds who spend time in coastal waters or consume contaminated shellfish are at the highest risk.

The Centers for Disease Control (CDC) warns that some Vibrio infections can escalate into “flesh-eating” diseases like necrotizing fasciitis, which can cause extensive tissue death. Symptoms include fever, chills, vomiting, and diarrhea, and can quickly lead to severe illness.

Health officials recommend that anyone with an open wound exposed to warm coastal waters monitor for infection signs over the next week. Immediate medical attention is advised if symptoms such as fever, chills, or blistering skin lesions appear.

To mitigate risks, authorities urge the public to avoid swimming in coastal waters with open wounds and to cover such wounds with waterproof bandages. Additionally, individuals should refrain from handling raw seafood and ensure any wounds are thoroughly washed with soap and water after contact with coastal water or shellfish.

As conditions evolve, more updates will follow. Residents and visitors are encouraged to stay informed and prioritize safety while enjoying Cape Cod’s beaches.