HONOLULU -- A 34-year-old man who is critically ill after contracting several serious infections does not appear to have the flesh-eating bacteria, according to family members.

The man fell ill soon after being in the sewage-contaminated water of the Ala Wai Yacht Harbor.

Friends initially thought Oliver Johnson had the flesh-eating bacteria. The Department of Health said the patient has three other bacterial infections.

Doctors already amputated one of Johnson's legs in an effort to save his life. Friends said Johnson's other leg is not responding to treatment and may have to be amputated as well.

Problems started early Friday morning, when friends said, Johnson was drinking at a Waikiki pub. They said that Johnson was on a boat at the Ala Wai Yacht Harbor, that a fight broke out in the early morning hours and Johnson ended up in the water.

Police said Johnson didn't report the assault until about 6:30 p.m. on Friday. That's when emergency crews were called to his Waikiki apartment and took him to Queen's Medical Center.

His friends said Johnson was athletic and healthy before coming in contact with the polluted water.

"The question has been posed to me if this is all related to sewage or not, and there's no way to predict because of the characteristics of these organisms," said Dr. Sarah Par, of the Department of Health's Infectious Disease Division.

A sewage main problem earlier forced the city to dump an estimated 48 million gallons of raw sewage into the Ala Wai Canal.

The Department of Health said it is possible Johnson's infections came from other sources.

"Maybe one of them was associated with sewage. Others may not be. There's no way to know for sure because, like I said, the water wasn't so great before," Park said.

The Department of Health said Johnson's case did not raise red flags, and no investigation is under way.

"Anything is reportable when it is above and beyond what you would expect. Physicians know that and they hadn't even alerted infection control because it wasn't necessarily a public health issue," Park said.

Johnson's friend said his mother is at his side and his brother is flying in from the mainland.