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Colonies are flat, droplet-like, glistening and tend to spread along the direction of the steak on moist agar. Older colonies become white to salmon-coloured. The colonies have a very characteristic odour.
This culture has been incubated for 48 hours in an atmosphere containing 5% oxygen and 10% carbon dioxide. |
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The same Blood Agar plate examined with transmitted light. The blood under the colonies has an intense red colour due to the production of cytochromes.
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| General characteristics: Gram-negative, very slender, curved rods. Catalase-positive, but are micro-aerophilic and optimum growth is achieved in an atmosphere containing 5% oxygen and 10% carbon dioxide. Oxidase-positive. Do not attack sugars. Motile. The optimum temperature for growth for the thermophilic campylobacters is 42°C, and they do not grow at temperatures below 30°C. |
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