The South Dakota Health Department reports that 26 more people have been found to have West Nile disease ---bringing the total number of cases in the state so far this year to 67.  State epidemiologist Lon Kightlinger says mid August is typically the peak time for the onset of West Nile virus cases.  So far, only one death has been reported from the mosquito-borne disease in the state this year.  Since the first case in 2002,  South Dakota has reported more than 1,800 West Nile cases, with 27 deaths. (AP)