Gram positive bacteria

Cocci

1. Clusters (Staph Species)
   1. catalase + Staphylococcus species
   2. coagulase + Staph aureus
   3. coagulase - Staph. epidermidis
2. Pairs/chains (Strep Species)
   1. catalase -

Rods (Bacilli)

Organism		Cult	Morphology
Listeria monocytogenes	Small	Aero	tumbling
Diphtheroids	Small	Anaero	pallisades
Actinomyces	Small	Anaero	Branching
Propionibac	Small	Anaero	clumps/pleo
Lactobacillus	Variable	Both	may chain
Clostridium	Large	Anaero	Spores
Bacillus	Large	Aero	Spores

Clinical Identification Chart

See Also

• Microbiology (Main)