The man has recovered from his symptoms after being bitten by a mosquito carrying the virus, the state Department of Health reports.
The agency has a policy of not releasing additional details of West Nile victims.
The man is the third human case in Pennsylvania so far this year.
The other two cases involve a 42-year-old York County woman who was hospitalized but is recovering at home, and a 43-year-old York County man who was hospitalized but has recovered.
In most cases, people with West Nile virus exhibit flu-like symptoms over a few days and are easily treated.
However, in more severe cases, inflammation of the brain can result, sometimes resulting in death.
People over 50 years old are the most susceptible to West Nile virus.
Certain species of mosquitoes carry West Nile virus. They have been identified throughout Lancaster County.
Mosquito pools have been sprayed in recent weeks in Manheim Township, Penn Township, Manheim Borough and Lititz Borough.
Mosquitoes carrying the virus have been confirmed in one location so far, in West Lampeter Township.
State officials advise residents to prevent places where water stands around their yards. Roof gutters that clog can be a particularly inviting place for mosquitoes to breed.
Plastic wading pools should be turned over and water should not be allowed to stagnate in birdbaths.
Ornamental pools should be aerated or stocked with fish. Water gardens can become major mosquito producers if they are allowed to stagnate.
Swimming pools left untended by a family on vacation for a month can produce enough mosquitoes to result in neighborhood-wide complaints.
For stagnant pools of water, homeowners can buy Bti products at lawn and garden, outdoor supply, home improvement, and other stores. This naturally occurring bacteria kills mosquito larvae but is safe for people, pets, aquatic life and plants.
If outdoors, people should consider wearing long-sleeved shirts and long pants and socks, particularly when mosquitoes are most active at dawn and dusk, or in areas known for having large numbers of mosquitoes.
Use insect repellents according to the manufacturer’s instructions, state officials further advise. An effective repellent will contain DEET, picaridin, or oil of lemon eucalyptus.
For more information about West Nile virus and the state’s surveillance and control program, go to www.westnile.state.pa.us.
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