West Nile Virus Detected in 36 States

Health Department confirms first case of West Nile Virus in Shelby County

Health Department confirms first case of West Nile Virus in Shelby County

"Of the mosquito-borne diseases, West Nile virus is the most common one in the continental United States". Officials with the Maryland Department of Health said in a statement that the infected person lives in the Baltimore region.

The agency didn't release any specific details on the case, but said the virus has been confirmed in mosquitoes throughout the county.

Fairfax County health officials said they've seen a "large increase" in mosquitoes carrying the virus.

The disease is most commonly transmitted to humans through a mosquito bite. The first batch of mosquitoes with the virus was detected three weeks later in the season compared to 2017, according to Callanan.

The number of confirmed infections can vary from year to year.

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Overall, 39 cases of West Nile have been reported in humans as of July 24.

The positive test came from one of the Haldimand-Norfolk Health Unit's mosquito traps in Simcoe. Initial symptoms can include fever, headache, nausea and vomiting, muscle aches and weakness and rash. WNV infections are generally mild but can, in more serious cases, cause encephalitis, meningitis, loss of vision, paralysis, coma, tremors, convulsions and death.

Less than 1 percent of infected people develop the sometimes fatal neuro-invasive illness.

Those who are 60 years of age or older are at the greatest risk along with those who have medical conditions like cancer, diabetes, hypertension, kidney disease, and or who have received organ transplants.

Callanan said the efforts residents are making to reduce mosquito breeding sites on their properties are helping every year.

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