From the Centers for Disease Control and Prevention. Outbreak of Legionnaires' disease among automotive plant workers--Ohio, 2001.

During March 12-15, 2001, four cases of Legionnaires' disease (LD) among workers at an automotive engine manufacturing plant (plant X) were reported to the Cuyahoga County Board of Health, Cleveland, Ohio; all four diagnoses were confirmed by Legionella urine antigen. Illness onset among the four workers occurred during March 2-4; two workers died. Beginning March 14, CDC assisted state and local health departments with an investigation to identify new cases and potential sources of Legionella transmission in the plant. This report summarizes the investigation; findings indicate an epidemiologic association with exposure to one of the plant finishing lines but did not identify a specific source.