Health officials believe they have successfully sterilized an area of Selfridge Air National Guard Base where six civilians are believed to have contracted Legionnaires’ disease.

Epidemiologist John Ambrose of the U.S. Army Public Health Command and Lt. Commander Lee Hampton of the the Centers for Disease Control and Prevention told The Detroit News for a story Saturday no new cases of the disease have been reported in recent days.

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A bacterial outbreak in July sickened more than 30 people.

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The newspaper said the disease appeared to stem from the area of two neighboring buildings at the base about 20 miles northeast of Detroit.

Legionnaires’ disease is a sometimes deadly disease that takes its name from an outbreak at the Pennsylvania American Legion convention in Philadelphia in 1976.

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