Microbiology (Main)

Background

• Culture and gram stain results

Gram Positives

Cocci

1. Clusters
   1. catalase + Staph sp
   2. coagulase + S. aureus
   3. coagulase - S. epidermidis
2. Pairs/chains -
   1. catalase - Strep sp.

Rods

Rods		Cult	Morphology
Listeria	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

Anaerobes

1. Origin - gut, mouth, head/neck (50% of chronic sinusitis), lung, female gu tract
2. Cant grow unless culture specifically asked. 3% of bacteremia, <1% of cystitis
3. Bacteroides (B.frag GNR) (Peptostreptococus GPC) (P. Acnes GPR), Clostridium GPR)

See Also

• Antibiotics (Main)