Draughtsman colonies are seen with
- REF : ananthanarayana 10th ed Pnuemococci Due to alpha hemolysk, colonies of pneumococci rcsemble colonies of Str. vidans. But on fuher incubation the colonies ofpneumococci become flat with raised edges and central umbonation, so that concentric rings are seen on the surface when viewed from above - draughtsman or Carrom coin appearance.
Anthrax
Pnuemococci
Peussis
Yersenia
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