Officials are dispatching fogging trucks in Portage La Prairie over increasing concerns about the West Nile virus.

The move comes after a high concentration of Culex tarsalis, the mosquito that can carry the West Nile virus, were found in the area.

Malathion spraying will begin Thursday night in Portage La Prairie and in a three kilometre area surrounding the city.

"This mosquito is harmful and dangerous and we want to make sure we get the problem solved," said Earl Porter, mayor of Portage la Prairie.

The trucks should begin spraying around 9:30 p.m. Aug. 2 until 2:30 a.m. on Aug. 3. People are reminded to close their windows. If it rains, the fogging will be delayed until Saturday.