50.8 MB (4.0 MB compressed)
3429 x 5176 pixels
29.0 x 43.9 cm ⏐ 11.4 x 17.3 in (300dpi)
A. DOWSETT, PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY A. DOWSETT, PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph (TEM) of the Gram-negative bacterium Legionella pneumophila. Each bacterium has a single flagellum which is faintly visible in between the cells. The bacteria was identified as an agent of disease in 1976 after a mysterious outbreak of pneumonia & other respiratory illness at an American Legion convention in the USA. It was found living in water- tanks, shower-heads & in the cooling towers of air- conditioning systems. The bacteria was subsequently named L. pneumophila and the disease, a form of pneumonia, 'legionnaire's disease' or legionellosis. Magnification: x5270 at 35mm size.
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