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Tem Of Shigella Sp. Bacteria
Photograph - Photograph
False-colour transmission electron micrograph (TEM) of a colony of Shigella sp., a genus of Gram-negative bacteria which causes dysentery in humans. Dysentery, affecting mainly the large intestines, varies in severity from a mild attack of diarrhoea to an acute infection. Until the introduction of the sulphonamide drugs in the 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. Here, the bacterium at centre is dividing through binary fission. Magnification x 10,000 at 35mm size, x20,000 at 6x7cm size.
May 13th, 2013
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