Washington (CNN) - Sen. Johnny Isakson, R-Georgia, is in the hospital.
Doctors believe Isakson has a bacterial infection, according to spokeswoman Joan Kirchner in a statement. Kirchner added that Isakson "is responding very well to the treatment and is feeling much better."
On Monday, Kirchner said, Isakson went to Northside Hospital in Atlanta after feeling sick and dehydrated. She said the senator hopes to recover quickly and return to work.