(September 4, 2003) - (Little Rock-AP) -- Arkansas' human cases of West Nile virus have spread beyond Jefferson County. The state Health Department says West Nile virus has been confirmed in four more people. New cases were reported in Cleburne, Miller, Pulaski and Sevier counties. Previously, the department had reported six human cases, all in Jefferson County. One new case includes a former mayor of Texarkana, Jack Trigg. His wife said he developed swelling of the brain with his infection. Carol Trigg says her husband is improving and should recover. The state is in its peak period for transmission of the disease, which is a particular danger to older people. Most people who contract the disease have mild or no symptoms. In rare cases, the illness can bring on fatal brain swelling.