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In Prince George's County, the Maryland Department of Agriculture said that mosquitoes have tested positive for the virus in Laurel, following similar reports in different parts of the state.
The latest batch of mosquitoes were trapped at the Highpoint Trail and Overlook Way, as well as Oxford Drive and Northlake Court.
In response, there will be an unscheduled spraying on Sunday in Laurel surrounding the trap sites where the mosquitoes were located.
"The department’s Mosquito Control Program will use a permethrin-based solution that the US Environmental Protection Agency has approved for use in public health mosquito control programs without posing unreasonable risks to human health," officials said.
"Out of an abundance of caution, the Maryland Department of Agriculture recommends avoiding outdoor activities during spraying."
Earlier this month, the Anne Arundel County Department of Health announced that mosquitos trapped in two parts of the region tested positive, representing the first cases identified this year.
More recently, there were more found in the Bowie area of Prince George's County that tested positive for the virus.
As of Thursday, Aug. 17, there were still no human cases confirmed.
According to the Maryland Department of Health, West Nile virus is spread by the bite of an infected mosquito who fed on an infected bird. They can then spread the virus to humans and other animals when they bite.
Most mosquitoes do not test positive for disease-causing viruses. However, a bite from a West Nile Virus-infected mosquito can cause serious illness, and in some cases, death.
“Although a person's chances of getting sick are small, those aged 50 and older are at the highest risk for serious illness,” officials noted. “Not everyone infected with West Nile Virus will become ill."
If contracted, West Nile can cause serious health complications, including neurological diseases, and can also cause a milder flu-like illness, including fever, headache and body aches, nausea, and occasionally a skin rash and swollen lymph glands.
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