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The form of Bacillus cereus colonies varies depending on strain. Generally large colonies with a dull or frost-glass surface and undulate margin.
Variations in colony morphology can be seen in the pictures below.
Click on the pictures below to see an enlarged version. |
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The same Blood Agar plate examined with transmitted light. There is a wide zone of haemolysis around the colonies.
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| General characteristics: Gram-positive, spore-forming rods. Catalase-positive. Normally motile, although often slow. Attacks glucose by fermentation. |
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