Colony Morphology

From MedLabWiki

Blood Agar

Chocolate Agar

CNA Agar

MacConkey Agar

Brucella Agar

Anaerobic Blood Agar

Thioglycolate Broth

Medium Used for Incubation Properties Organisms Grown
Blood Agar General growth of most organisms CO2 35°C
Chocolate Agar Growth of fastidious organisms CO2 35°C Most organisms that grow on blood agar

Fastidious organisms

CNA Agar Growth of gram positive organisms CO2 35°C
MacConkey Agar Growth of gram negative organisms O2 35°C
Brucella Agar Growth of obligate anaerobic organisms ANO2 35°C
Anerobic Blood Agar Growth of facultative and obligate anaerobic organisms ANO2 35°C
Thioglycolate Broth Used for subculturing scant growth organisms

Colony Morphology Appearances by Organism

Chocolate Agar

  • Grows most organisms that grow on standard blood agar
  • Fastidious organisms
    • Haemophilus sp.
      • Haemophilus influenzae
      • Haemophilus parainfluenzae
    • Moroxella
    • Neisseria
      • N. meningitidis
      • N. gonorrhoeae