Colony Morphology

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