Colony appearances of bacteria

Bacillus anthracis

  1. Bamboo stick
  2. medusa head
  3. Inverted fir tree appearance

Tip:Anthrax usually related to cow,imagine a cow tied to a fir tree/Bamboo.

Bordetella Pertussis

  1. Thumb print
  2. Besected pearls
  3. Mercury drops
  4. Aluminium paint

These are the typical appearances of pertussis

Tip:Cough is a typical feature of pertussis/whooping cough.So just imagine someone coughing and splashing all the infective material around.

Hemophilus ducreyi

School of red fish




Fried egg colony

Clostridium perfringens

Naaeglers reaction

Neisseria meningitidis

Lenticuar shaped


  1. Draughtsman appearance
  2. Concentric rings appearance


  1. Swarming growth
  2. Fishy/seminal smell


Oil paint appearance

Yersinia pestis

Stalatite growth in ghee broth

Corynebacterium Diptheriae

  1. C.diptheriae(gravis)-Daisy head colony
  2. Intermedius-Frogs egg colony
  3. Mitis-Poached egg colony
  1. Komal khaniya

    Very good…

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