On Apr. 27, last year, youths are jumping into the sea and having a great time at Yeongildae Beach in Bukgu, Pohang, North Gyeongsang Province. /News1

The first cases of Vibrio vulnificus infection, a summer infectious disease, have been reported this year. Vibrio vulnificus infection occurs when contaminated fish or shellfish are eaten without being properly cooked. The Vibrio vulnificus bacteria proliferate when the seawater temperature exceeds 1 degree.

The Korea Disease Control and Prevention Agency reported on the 15th that a 70-year-old man diagnosed with Vibrio vulnificus infection was treated at a hospital in South Chungcheong Province on the 10th. The man had a pre-existing liver condition, placing him in the high-risk group for Vibrio vulnificus infection.

Cases of Vibrio vulnificus infection typically emerge in May and June, with particularly high numbers in hot months like August and September. Last year, there were 49 reported cases of Vibrio vulnificus infection, with 21 fatalities. Symptoms of the infection include acute fever, chills, low blood pressure, abdominal pain, vomiting, and diarrhea. Blisters or swelling can develop on the legs within 24 hours of symptom onset.

To prevent Vibrio vulnificus infection, it is essential to cook shellfish or fish thoroughly at over 85 degrees. It is advisable to avoid contact with seawater if there are skin wounds. The health agency noted, 'If infection symptoms appear, it is necessary to visit a hospital for treatment.'