The Kansas Department of Health and Environment says an adult from Atchison County has the state's first case of West Nile virus this year.
KDHE says on its website that a mosquito sample in Sedgwick County has also tested positive for West Nile, a virus that can be spread to people through bites from infected mosquitoes, but is not contagious from person to person. Symptoms include headaches and low-grade fever to swelling of the brain.
West Nile virus cases are most common in the late summer and early fall months.
The health department says there were 57 cases of West Nile virus in Kansas in 2012. That was the most cases since the virus was first found in Kansas a decade earlier.