BISMARCK, N.D. (AP) _ North Dakota's Health Department is reporting a small surge in the number of reported cases of the West Nile virus.
The agency says 13 new human cases of the virus have been identified since the first one of the year was reported last week.
Five of the people who have been infected were put into the hospital.
The virus is carried by mosquitoes. The Health Department's Michelle Feist (FYST) says the West Nile virus has been relatively quiet for the last five years.
But she says the dry and hot conditions that have prevailed this summer are good for the type of mosquito that carries the illness.
Health officials say people who are outdoors between dusk and dawn should wear mosquito repellent and long-sleeved shirts and pants.