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PHIL Image 10155
 
ID#:10155
Description:This micrograph depicted details seen in a lung tissue specimen from a Knoxville patient with fatal pneumonia due to Legionnaires’ disease. The tissue was stained using hematoxylin-eosin (H&E) stain. Legionella pneumophila are Gram-negative bacteria. Using H&E stain, these organisms, if present in the specimen, would stain a pink or red color. Note how the alveolar spaces are so congested with a leukocytic infiltrate in response to the infection.

How serious is it? What is the treatment?

Legionnaires' disease can be very serious and can cause death in up to 5% to 30% of cases. Most cases can be treated successfully with antibiotics, and healthy people usually recover from infection.

How do people get Legionnaires’ disease?

People get Legionnaires' disease when they breathe in a mist or vapor (small droplets of water in the air) that has been contaminated with the bacteria. One example might be from breathing in the steam from a whirlpool spa that has not been properly cleaned and disinfected.

The bacteria are NOT spread from one person to another person.

Outbreaks are when two or more people become ill in the same place at about the same time, such as patients in hospitals. Hospital buildings have complex water systems, and many people in hospitals already have illnesses that increase their risk for Legionella infection.

Other outbreaks have been linked to aerosol sources in the community, or with cruise ships and hotels, with the most likely sources being whirlpool spas, cooling towers (air-conditioning units from large buildings), and water used for drinking and bathing.

High Resolution:Right click here and select "Save Target As..." for hi-resolution image (6.59 MB)
Content Providers(s):CDC/ William Cherry
Creation Date:1978
Photo Credit:
Links:
  • CDC – Div. of bacterial and Mycotic Diseases – Legionellosis: Legionnaire's Disease (LD) and Pontiac Fever
    Categories:
    CDC Organization

    MeSH
    tree picture Analytical, Diagnostic and Therapeutic Techniques and Equipment
    tree picture tree picture Diagnosis
    tree picture tree picture Investigative Techniques
    tree picturetree picture tree picture Clinical Laboratory Techniques
    tree picturetree picturetree picture tree picture Cytological Techniques
    tree picturetree picturetree picturetree picture tree picture Histocytological Preparation Techniques
    tree picturetree picturetree picturetree picturetree picture tree picture Staining and Labeling
    tree picturetree picturetree picture tree picture Histological Techniques
    tree picturetree picturetree picturetree picture tree picture Histocytological Preparation Techniques
    tree picturetree picturetree picturetree picturetree picture tree picture Staining and Labeling
    tree picture Chemicals and Drugs
    tree picture tree picture Heterocyclic Compounds
    tree picturetree picture tree picture Heterocyclic Compounds, 2-Ring
    tree picturetree picturetree picture tree picture Benzopyrans
    tree picturetree picturetree picturetree picture tree picture Hematoxylin
    tree picture Diseases
    tree picture tree picture Bacterial Infections and Mycoses
    tree picturetree picture tree picture Bacterial Infections
    tree picturetree picturetree picture tree picture Gram-Negative Bacterial Infections
    tree picturetree picturetree picturetree picture tree picture Legionellosis
    tree picturetree picturetree picturetree picturetree picture tree picture Legionnaires' Disease
    tree picture tree picture Respiratory Tract Diseases
    tree picturetree picture tree picture Respiratory Tract Infections
    tree picturetree picturetree picture tree picture Legionellosis
    tree picturetree picturetree picturetree picture tree picture Legionnaires' Disease
    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.
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