Correct name: Staphylococcus aureus subsp. aureus.
Medium-sized, raised, glistening colonies. The colonies are pigmented, the colour varying from grey-white, to yellow, or orange.
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The same Blood Agar plate examined with transmitted light. The colonies are surrounded by an inner zone of complete haemolysis (delta-toxin) and an outer zone of incomplete haemolysis caused by beta-toxin. The margin of the beta-haemolysis is sharp.
The pictures below show examples of haemolytic zones caused by other toxins. Click on the pictures to see enlarged versions. |
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