DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
Shigella dysenteriae. Coloured transmission electron micrograph (TEM) of Shigella dysenteriae bacteria, the cause of dysentery in humans. A longitudinal section through a bacterial cell is seen (at centre). Dysentery affects mainly the large intestines and varies in severity from a mild attack of diarrhoea to an acute infection. Until the introduction of sulphonamide drugs in the 1930s it was a killer disease of the world. It still affects the young, elderly & malnourished. Infection is spread by flies, direct contact, & water contaminated by faeces containing the bacillus. Magnification: x38,000 a 6x7cm size.
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