OKLAHOMA CITY (AP) — The Oklahoma State Department of Health says the number of West Nile virus cases is increasing dramatically in the state.
The department says 31 cases of West Nile have been confirmed so far this year -- more than in the past four years combined.
Tulsa County has reported the highest number of cases, with nine, while Oklahoma County reported six and Carter County reported five.
The department says more than a quarter of the cases have occurred among Oklahomans in their 70s.
The virus is spread through mosquito bites. The health department says people should wear insect repellent and ensure their yard is free of standing water, which attracts mosquitoes.