The West Nile virus has been confirmed in mosquitoes in Marshall County but no human cases have been reported. The best way to protect yourself from mosquitoes is to avoid being outdoors during peak biting times which occur from the evening to early morning hours. If you need to be outside, apply mosquito repellent with DEET or wear long-sleeved shirts and long pants while outdoors. To rid your property of potential breeding grounds for mosquitoes, discard old tires, tin cans, plastic containers, ceramic pots or other containers that can hold water; repair failed septic systems; keep grass cut short and shrubbery trimmed; flush ornamental fountains and birdbaths periodically, and stock ornamental pools with fish. West Nile virus is transmitted to humans by mosquitoes that have first bitten an infected bird. A person bitten by an infected mosquito may show symptoms three to 15 days after the bite. West Nile virus is not transmitted from person to person.