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.