OKLAHOMA CITY (AP) — Health officials in Oklahoma a warning of the return of the West Nile virus to the state.
The Oklahoma Health Department says eight cases have been confirmed in the state — four in Tulsa County, two in Pittsburg County and one each in Garfield and Carter counties.
There was just one West Nile case in the state in 2011.
The health department said those infected range from 29 to 78 years old.
The virus is spread through by the Culex mosquito — which feeds on infected birds and then transmits the virus when biting humans.
Symptoms include fever, headache, dizziness, and muscle weakness. Long-lasting complications can include difficulty concentrating, migraine headaches, extreme muscle weakness and tremors, and paralysis.