Colony Morphology Appearances by Organism

Organism	BA	CHOC	CNA	MAC	ANO2	BRUC	Gram
Staph aureus	Med, white or gold, beta-heme						GPC clusters
Beta-heme Strep
Enterobacterales
Pseudomonas aeruginosa
Haemophilus spp.	NG or satellitism with S. aureus	Small, gray, non-heme					GNCB
Neisseria spp. Moraxella spp.							GNDC
Listeria	small, gray, beta-heme (faint edge of beta-hemolysis)						small GPB (no specific morphology)
Corynebacterium spp.	ppt/sml, white, non-heme						small GPB in v's and palisades; club-shaped
Clostridium					Double-zone beta-heme		Large GPB (boxcar)

Reporting CMI

These are the following organisms to report for CMI:

• Haemophilus spp.
• Neisseria/Moraxella spp.
• Listeria monocytogenes
• Corynebacterium spp.
• Bacillus spp. (non anthracis)
• Lactobacillus
• Yeast?

Fastidious gram negatives

Gram positive bacilli

• LBLC