ABC News’ Z. Byron Wolf Reports: The longest serving senator ever, Sen. Robert Byrd, D-W.V., was hospitalized Friday after a "minor infection" caused a spike in his temperature, according to a statement released today from his office. Byrd, who is 91 and in his ninth term in the Senate, is expected to be released from the hospital "in a few days." It was almost a year ago exactly that Byrd was hospitalized for an elevated temperature. His office eventually said was a bad reaction to antibiotics. Byrd stepped down from his powerful position as chairman of the Senate Appropriations Committee last November, but has remained visible on Capitol Hill. As the longest-serving Democrat, he is still the President Pro Tempore of the Senate. He can often be heard yelling loudly for order on the Senate floor when the conversation of other senators keeps him from hearing speeches.