FLORENCE, Ariz. - Pinal County is reporting its first human case of West Nile virus this year.
County health officials say a woman in her 30s from the northern Florence area has tested positive. Her name hasn't been released, but her prognosis is good and she has reported only mild symptoms so far.
Countywide surveillance activities have detected mosquitoes carrying the virus in Maricopa, San Tan Valley, Arizona City, Florence and Coolidge.
Seven human cases of West Nile have been identified statewide this year including six in Maricopa County. Several other potential human cases are under investigation by state health officials.
Common symptoms of West Nile virus include fever, nausea, headache and muscle aches.
State health data shows that Arizona had 67 cases of West Nile last year, four of which were fatal.