"Positive and suspected West Nile cases are a reminder that preventative measures are important", said Dr. Faisal Khan, director of the department.
West Nile Virus has made its second appearance in Lambton County this summer, says Lambton Public Health.
The virus was first identified in Iowa in a dead crow in 2001 and cases of human infection have been reported every year since 2002.
China's July exports rise more than expected despite US tariffs
But within days, Trump himself backed away from the deal, saying talks would "probably have to use a different structure". Beijing is expected to hit $16 billion worth of United States goods with equal tariffs in response to Tuesday's move.
"Over the past few weeks, West Nile virus activity has been on the rise across Ontario, so it's not surprising to see positive mosquito pools in Perth County", says Dale Lyttle, Senior Public Health Inspector.
Symptoms of West Nile virus include fever, confusion, muscles weakness and severe headache.
The mosquitos get the virus by feeding on infected birds.
Collins and son charged with insider trading
Prosecutors say the three avoided over $768,000 in losses by trading ahead of the public announcement of the failed drug trials. Collins gained prominence for being one of the earliest Capitol Hill backers of President Donald Trump .
DCHHS recommends that Dallas County residents use an insect repellent containing DEET whenever they go outside, and that they dress in long, loose and light-colored clothing.
Dusk and dawn are when mosquitoes are most active. Health officials note that even a container as small as a bottle cap can become a mosquito breeding ground, so residents should take to eliminate standing water.
Chinese exports accelerate as USA prepares new tariffs
No date yet for the previously announced retaliatory tariffs on $16 billion in US goods, which will largely target commodities. In April, the administration had announced plans to slap tariffs on 1,333 Chinese product lines worth $50 billion a year.