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Medium-sized grey colonies. The colonies have a characteristic odour.
Click to enlarge. |
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The same Blood Agar plate examined with transmitted light. There is a zone of beta-haemolysis around the colonies.
The picture below is of another E. coli where there is no haemolytic zone around the colonies. |
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| General characteristics: Gram-negative rods. Catalase-positive and oxidase-negative. Attacks sugars by fermentation and gas is produced. Motile. Mesophilic. |
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