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Coloured EM of macrophage with engulfed Legionella
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Coloured EM of macrophage with engulfed Legionella
Coloured transmission electron micrograph (TEM) of a human lung macrophage which has engulfed the bacteria Legionella pneumophila. Macrophages are scavenger cells found at sites of infection; they remove bacteria or other foreign bodies from blood or tissue. At centre is the dumbbell-shaped nucleus (orange & green) of the macrophage. At upper left, in a cell vacuole (dark blue), are the L. pneumophila bacteria (red). As the agent of Legionnaires disease, these bacteria cause pneumonia and other respiratory illness. Human infection occurs through contaminated water of air-conditioning or shower systems. Magnification: x5600 at 6x6cm size
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6421226
© A.B. DOWSETT/SCIENCE PHOTO LIBRARY
Defence Immune Immunology Lung Macrophage System Cells Legionella
EDITORS COMMENTS
This print showcases the intricate world of our immune system. In this coloured transmission electron micrograph, we witness a human lung macrophage in action as it engulfs the notorious bacteria Legionella pneumophila. Macrophages are like diligent scavengers that tirelessly patrol sites of infection, eliminating any foreign bodies they encounter. At the heart of this image lies the nucleus of the macrophage, resembling a vibrant dumbbell with shades of orange and green. Positioned at the upper left corner within a dark blue cell vacuole, we can observe clusters of L. pneumophila bacteria depicted in striking red hues. These tiny invaders are responsible for causing Legionnaires disease - a severe form of pneumonia and respiratory illness. Human infection occurs when contaminated water or air-conditioning systems become sources for these harmful bacteria to thrive. The consequences can be dire if not promptly addressed by our remarkable immune defenses. With an impressive magnification level reaching x5600 at 6x6cm size, this photograph offers us an extraordinary glimpse into the microscopic battlefield taking place within our lungs. It serves as a powerful reminder of both the complexity and resilience exhibited by our body's defense mechanisms against infectious agents like Legionella pneumophila.
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