Gram
Positive
Cocci
Bacilli
Clostridium
spp.
Obligate
anaerobic
Peptostreptococcus spp.,
Peptinophilus spp.,
Parvimonas spp.,
Anaerococcus spp.,
Atopobium spp.,
F. magna
Obligate
anaerobic
Aerobic/
Facultative
anaerobic
Bacillus spp.,
Lactobacillus spp.,
Listeria spp.,
Corynebacterium
spp.
Actinomyces spp.,
Eubacterium spp.,
Bifidobacterium spp.,
P. acnes
Acid fast
Nocardia spp.
Sporeforming
Aerobic/
Facultative
anaerobic
Catalase
positive
Catalase
negative
Mycobacterium
In chains
In groups
Slow growing
(M. tuberculosis,
M. kansasii,
M. marinum,
M. gordonae,
MAC)
Alphahemolytic
Betahemoltyic
Gammahemolytic
Coagulase
positive
S. aureus,
S. intermedius
S. pneumoniae,
Viridans group
strep
Group A
(S. pyogenes)
Group B
(S. agalactiae)
Group C, F, G
Group D (S. bovis)
Enterococcus
Coagulase
negative
S. epidermidis,
S. saprophyticus,
S. capitis,
S. lugdunensis,
S. haemolyticus
S. hominis,
S. pettenkoferi,
Micrococcus/Rothia
Rapid growing
(M. mucogenicum,
M. abscessus,
M. chlenoae,
M. fortuitum)