DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY DR KARI LOUNATMAA / SCIENCE PHOTO LIBRARY
Francisella tularensis. Coloured transmission electron micrograph (TEM) of a section through Francisella tularensis bacteria. One bacterium (centre right) is seen sliced through lengthwise; others are cut widthwise. The cell wall is seen, with inner cell contents. Francisella tularensis is a Gram-negative rod-shaped (though pleomorphic) bacillus bacteria which is non-motile. It is an insect-borne pathogen of rabbits, squirrels and other rodents in many countries notably the west USA and in Russia. The bacteria may be transmitted to humans causing tularaemia. Ticks, fleas, flies, may trasmit the organism. Treatment is with anti- biotics. Magnification x58,000 at 6x7cm size. Previously named Pasteurella tularensis & Brucella tularensis.
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