West Nile fever, mosquito and Boston
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Dr. Letosha Gale-Lowe said the county has noticed a rise in the mosquito population following recent rains and warmer months.
Following the discovery of West Nile virus in mosquitoes in Rolando late last month, county crews will conduct pesticide treatments this week.
Weld County had 15 reported cases of human West Nile virus, according to the website. The year before reached 52 cases.