Health department spraying for mosquitos on South, Northwest Sides

Wednesday, July 17, 2013
A mosquito is shown in this undated file image.

A mosquito is shown in this undated file image. (KABC Photo)

The Chicago Department of Public Health will be spraying insecticide Wednesday night in portions of the Auburn Gresham, Washington Heights and Forest Glen neighborhoods.

Part of the challenge of treating West Nile virus is the unpredictability of outbreaks.

Certain factors could help guide future prevention of the mosquito- borne illness.

"There were certain, what we call, geographic hot spots, the same geographic areas within our county tended to be affected more heavily during an outbreak," said Wendy Chung, MD, Dallas County Health and Human Services in Dallas, Texas.

Texas has seen some of the largest outbreaks in the country.

Researchers there are studying weather patterns, timing and geography to determine which areas are most prone to cases.

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