Vibrio bacteria spread forces beach closures across Mediterranean

Health authorities across Europe warn that warm, brackish waters in the Mediterranean are encouraging the growth of Vibrio bacteria, including V. vulnificus. The organisms proliferate during heatwaves and in low‑salinity zones such as river mouths and lagoons. The European Food Safety Authority (EFSA) and the European Centre for Disease Prevention and Control (ECDC) note that infection can occur by eating raw or under‑cooked seafood or by contact of open wounds with contaminated water, leading to gastroenteritis, necrotising fasciitis, sepsis and, in severe cases, amputation.

Several beaches in Spain have already been closed temporarily, and similar restrictions are being considered in other coastal nations. Experts link the rise in cases to climate‑driven sea‑temperature increases; one analyst, Hatim Aznague of the Union for the Mediterranean, said, “The Mediterranean shows us what a hotter world means.” The closures pose a direct threat to the summer tourism economy, with coastal municipalities warning of lost revenue during peak season.

The situation is being monitored closely, and authorities urge swimmers and seafood consumers—especially people with open wounds, liver disease, diabetes or weakened immune systems—to take precautionary measures until water quality improves.