The first case of West Nile virus in Oklahoma this year was confirmed Wednesday.
An Oklahoma County female resident between 10 and 19 years old has contracted West Nile virus and remains in a hospital.
Information isn't available regarding where in Oklahoma County she contracted the virus.
Meanwhile, officials are urging residents to take precautions against mosquitoes, such as wearing repellent when outdoors and emptying any standing water outside the home.
Until Wednesday, Oklahoma remained one of about 25 states that hadn't reported human cases of West Nile virus this year, according to the Centers for Disease Control and Prevention.
Meanwhile, as of Tuesday, every state that borders Oklahoma besides Missouri had reported West Nile activity in humans and animals, according to CDC.
About the virus
West Nile virus is a mosquito-borne illness that people usually contract through the bite of a mosquito.
Common symptoms of West Nile Fever include headache, fever and tiredness. In some cases, West Nile virus can cause severe neurologic disease such as meningitis, or swollen membranes in brain and spinal cord; paralysis; or encephalitis, swelling and inflammation of the brain.
Last year, Oklahoma experienced a record number of cases of West Nile virus and deaths associated with the virus. A total of 176 residents were sickened and 15 people died in Oklahoma as a result of the virus.
Pamela Williams, spokeswoman for the Oklahoma Health Department, said the female resident who contracted West Nile has developed neuroinvasive disease as a result of the virus.
Younger people aren't generally as likely to develop neuroinvasive disease as a result of West Nile. Last year, only 10 residents 19 or younger developed West Nile virus disease, and of that, five developed neuroinvasive disease.
Last year, 91 residents who contracted West Nile developed neuroinvasive disease. The majority were older than 40.
Generally, people older than 50 who contract West Nile are at a higher risk of developing neuroinvasive disease, or severe disease of the nervous system.
About 80 percent of people who contract West Nile virus do not show symptoms, experts say.