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41.3 MB (41.0 MB compressed)
4400 x 3278 pixels
37.3 x 27.7 cm ⏐ 14.7 x 10.9 in (300dpi)
LONDON SCHOOL OF HYGIENE & TROPICAL MEDICINE / SCIENCE PHOTO LIBRARY LONDON SCHOOL OF HYGIENE & TROPICAL MEDICINE / SCIENCE PHOTO LIBRARY
False colour transmission electron micrograph of a rod shaped bacterium, Shigella sp., a pathogenic strain causing dysentery. Dysentery, affecting mainly the large intestines, varies in severity from a mild attack of diarrhoea to an accute infection. Until the introduction of the drug sulphonamides in the late 1930s it was a killer disease of the world. It still is among the young, elderly & malnourished. The infection is spread by flies, direct contact, & water contaminated by faeces containing the bacillus. Magnification: x16,500 at 35mm size. Original is bw print b220/117.
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