Updated

Democratic presidential candidate Dennis Kucinich (search) was released Wednesday from a Cleveland-area hospital after being treated for a stomach flu.

The Ohio congressman checked into the hospital Monday morning for tests and was diagnosed with gastroenteritis (search), a severe stomach flu, possibly caused by food poisoning.

After leaving the hospital, Kucinich planned to hold a news conference in his Cleveland district about President Bush's visit there, then return to Washington on Thursday, said his spokesman, Doug Gordon.

"He's feeling good and ready to resume a full schedule," Gordon said.

The long-shot candidate was traveling to Selma, Ala., for an event Sunday when he started having abdominal pains and called his doctor.