Cook Co. reports 6 cases of Legionnaires' disease

The Cook County health department says it's investigating six recent cases of Legionnaires' disease in Chicago's south suburbs.

The department said Monday five cases were in Tinley Park and one case was in Orland Park.

A spokesman says three of the cases involved people who went to a grocery store in Orland Park. He says health investigators have tested a misting system used to spray produce there.

The department says all the victims were treated and released from area hospitals.

Legionnaires' disease is a type of pneumonia that can spread through plumbing and air conditioning systems.

Centers for Disease Control and Prevention statistics show between 8,000 and 18,000 people are hospitalized with the disease in the U.S. each year.