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Description:This photograph, taken around the time of the Legionnaires’ outbreak of 1976, showed Centers for Disease Control’s Joseph E. McDade, Ph.D., (Lt) and Charles C. Shepard, M.D.
On January 14, 1977, the director of CDC's Laboratory Division, Charles Shepard, M.D., and microbiologist Dr. McDade, isolated the agent that had caused the Legionnaires’ outbreak.

Legionnaires’ disease is caused by a type of bacteria called Legionella pneumophila. The bacteria got its name in 1976, when many people who went to a Philadelphia convention of the American Legion suffered from an outbreak of this disease, a type of pneumonia (lung infection). Although this type of bacteria was around before1976, more illness from Legionnaires’ disease is being detected now. This is because we are now looking for this disease whenever a patient has pneumonia.

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Content Providers(s):CDC
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Links:CDC – Nat. Center for Infectious Diseases, Div. of Bacterial and Mycotic Diseases; Hansen’s Disease (Leprosy)
CDC – Division of Bacterial and Mycotic Diseases – Legionellosis: Legionnaires’ Disease (LD) and Pontiac Fever
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.