(Gig Harbor, WA)  --  Casey Kasem is in critical condition as he continues to battle an infected bedsore.  Officials at St. Anthony Hospital in Gig Harbor say the ailing radio legend is on I-V antibiotics, blood pressure and pain medication while he's being treated for the wound.  Kasem is reportedly "alert" and "appears comfortable."  The retired radio personality arrived at the hospital Sunday.  Kasem's children have been involved in a dramatic personal and legal battle with his current wife, Jean, over both his care and access to the star.