[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/06/03/art.byrd.gi.jpg caption=" Committee Chairman Sen. Robert Byrd."]
(CNN) - Sen. Robert Byrd, D-West Virginia, will remain in the hospital for several days, according to a statement from his Senate office.
“At the recommendation of his physicians, Senator Robert C. Byrd will remain in the hospital for several more days for monitoring and antibiotic treatment for a mild infection," said the statement.
“Byrd is alert, talking with staff and in good spirits and looks forward to getting back to work as soon as possible.”
Byrd was hospitalized Monday night after the 90-year-old Democrat from West Virginia appeared lethargic when he arrived at his Senate office in preparation for a vote on global warming, the spokesman said.