Draughtsman appearance

Draughtsman appearance is seen with colonies of:

a) Pneumococcus

b) Streptococcus

c) Staphylococcus

d) None of the above

Correct answer: a) Pneumococcus

Appearance of pneumococcus colonies after prolonged incubation in blood agar – with concentric rings and central umbonation – also called carrom coin appearance.

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