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John Townsend, Maricopa County’s Vector Control Division Manager, examines a sample of mosquitoes. Mosquitoes fly, but they spend the first three stages of their life in water.

The southern half of Arizona appears to be an ongoing source of West Nile in neighboring states as the virus appears to be here to stay, according to a study from Northern Arizona University and the Translational Genomics Research Institute in Phoenix. Read more»

Tucson Water and the city's Fire Department will hold a controlled burn of the Sweetwater Wetlands on Friday morning. In years past, residents have inundated 911 with calls reporting smoke in the area. This year, TFD Capt. Barrett Baker is urging people to remain calm. Read more»

Smoke on the water shouldn't be a concern for area residents Wednesday morning, officials said, as a controlled burn in the Sweetwater Wetlands will target mosquito habitat. Read more»

While cases of West Nile virus, which is carried by mosquitoes, are exploding across the country, Arizona’s West Nile season has been fairly routine, officials say.

While the number of West Nile cases almost doubled around the country, cases in Arizona are on par with previous years. There have been 1,590 cases of West Nile virus reported in the U.S. so far putting the country on track for the worst year ever. (with video) Read more»