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Description:Under a magnification of 500X, this Brown and Brenn-stained photomicrograph of a lung section specimen, revealed the presence an intra-alveolar exudate containing macrophages, and polymorphonuclear (PMN) leukocytes in a case of Legionellosis, due to the bacterium, Legionella pneumophila.
Legionnaires' disease, (LD), is the more severe form of legionellosis, and is characterized by pneumonia, commencing 2-10 days after exposure. Pontiac fever is an acute-onset, flu-like, non-pneumonic illness, occurring within a few hours to two days of exposure.
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Content Providers(s):CDC/ Francis W. Chandler, DVM, PhD
Creation Date:1978
Photo Credit:
Links:CDC - National Center for Immunization and Respiratory Diseases - Legionellosis
CDC Organization
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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.