(AP) — Officials have reported the first human case of West Nile virus in Lancaster County this year.

The Lincoln-Lancaster County Health Department did not release additional information about the case. But it says in a news release Friday that the department was recently notified that mosquitoes collected in late August were positive for the virus.

West Nile is transmitted to people through mosquitoes that feed on an infected bird. Most infected people have no symptoms or only mild flu-like symptoms. A small percentage develops a serious illness.

State health officials say that as of Friday, there have been 22 human cases of West Nile in Nebraska.