BRENDA D. POLITI, D.V.M.; DAVID W. FRASER, M.D.; GEORGE F. MALLISON, M.P.H.; JAMES V. MOHATT, M.P.A.; GEORGE K. MORRIS, Ph.D.; CHARLOTTE M. PATTON, M.S.; JAMES C. FEELEY, Ph.D.; RICHARD D. TELLE, M.D.; JOHN V. BENNETT, M.D.
Thirty-nine cases of Legionnaires' disease in a 16-month period were identified in visitors to and residents of Bloomington, Indiana. Thirty-five patients had spent at least one night at the Indiana Memorial Union in the 2 weeks before becoming ill. Five of 32 sporadic cases nationwide between 1 January and 31 March 1978 were retrospectively shown to be in persons who had recently visited the Union. The risk of acquiring Legionnaires' disease as a Union visitor was at least 17 times greater than that for Bloomington residents 20 years or older. Employees who had worked at the Union 5 years or longer were more likely to be seropositive than workers in other Bloomington hotels. Legionnaires' disease bacterium was isolated from five environmental sites in Bloomington. A cooling tower may have been involved in disease spread, but it was not the only source. Hypochlorite solution was added to cooling tower water as a precautionary measure; however, one case was confirmed in a man with Union exposure 9 days after hypochlorite treatment had begun.
POLITI BD, FRASER DW, MALLISON GF, et al. A Major Focus of Legionnaires' Disease in Bloomington, Indiana. Ann Intern Med. 1979;90:587–591. doi: 10.7326/0003-4819-90-4-587
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Published: Ann Intern Med. 1979;90(4):587-591.
Infectious Disease, Pulmonary/Critical Care.
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