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This historic 1977 image, showed Centers for Disease Control and Prevention’s (CDC) Joseph E. McDade, PhD (left), and Charles C. Shepard, MD, working with a microscope in CDC’s Leprosy and Rickettsia labs. On January 14, 1977, the director of CDC's Laboratory Division, Dr. Shepard, and microbiologist Dr. McDade, isolated the agent that had caused the Legionnaires’ outbreak. They had determined that the cause of Legionnaires’ disease was a type of bacteria, they then named, Legionella pneumophila.
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CDC Organization
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