DR LINDA STANNARD, UCT / SCIENCE PHOTO LIBRARY DR LINDA STANNARD, UCT / SCIENCE PHOTO LIBRARY
Legionella bacteria. Coloured Transmission Elec- tron micrograph (TEM) of the bacteria Legionella pneumophila, cause of Legionnaires' disease. Here, bacteria are seen sectioned. They are rod-shaped Gram-negative bacilli with a single motile flagellum. L. pneumophila was first identified as an agent of disease after a mysterious outbreak of pneumonia caused 29 deaths at an American Legion convention in 1976. The bacteria was found living in water-tanks, shower-heads and air-conditioning systems. The disease, also called legionellosis, causes fatal pneumonic lung damage in the elderly and unfit. Magnification: x2,500 at 35mm size.
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