A mosquito trapped near the city of Troy tested positive for West Nile virus, the Madison County Health Department confirmed.
All four cases, the CDC says, were confirmed following blood donations.
Health experts say that they expect the incidence rate to only keep increasing as the scorching heat drags on, and are encouraging the public to protect themselves.
Mosquito pools in every county in New Jersey except for Passaic have tested positive for the virus. "These factors indicate that the risk for human West Nile virus infections is elevated and will likely remain elevated through the remainder of August". MDH says there were 30 West Nile cases last year and 83 the year before.
This year, West Nile has not yet been found in a Wisconsin resident.
Chelsea duo leave on season-long loans
The 23-year-old spent the previous campaign out on loan with Stoke City and featured regularly in their starting line-up. Everton manager Marco Silva confirms that a loan deal to bring Kurt Zouma to the club from Everton is "almost done".
This year, deaths have so far been reported in Iowa, North Carolina and Texas.
About 80 per cent of people bitten by an infected mosquito don't show any symptoms at all, Miller said.
The virus can cause symptoms similar to those of the flu, but in extreme cases, it can result in tremors, fever, comas and a lethal swelling of the brain tissue known as encephalitis.
The Cape Cod Times reports that state Department of Health said Thursday 14 mosquito samples from Falmouth, Barnstable, Dennis, Bourne and Yarmouth tested positive for the virus after being trapped Tuesday and July 31. Of those who develop a serious illness from the virus, one in 10 die, according to officials.
Wear long sleeves and trousers or wear repellent to help protect yourself from getting bitten.