The Allegheny County Health Department has confirmed the first human case of West Nile virus for the year 2025. A resident of Plum Borough has tested positive for the virus and is currently recuperating at home after beginning to show symptoms that include fever, malaise, diarrhea, and anorexia since mid-July, as reported by WPXI.
In response, the county health officials began ramping up their surveillance efforts last Thursday to better understand and mitigate the spread of the virus in the affected area. Details of the individual's caseload were sparse, but the health department disclosed that the person is no longer hospitalized and is on the mend at their residence, according to a WTAE report.
West Nile virus, transmitted by mosquitoes, presents a spectrum of potential impacts on human health. The Centers for Disease Control and Prevention (CDC) indicates that while 70% to 80% of those infected do not show symptoms, approximately 20% will experience fever and additional symptoms such as headache, body aches, joint pains, vomiting, diarrhea, or rash. Severe neurological illness, which is characterized by inflammation of the brain or spinal cord, develops in less than one percent of infections.
The Allegheny County Health Department advises the community to remove standing water around properties, maintain their window and door screens, and apply insect repellent, especially during dawn and dusk hours when mosquitoes are most active.
