Microbiology (Main)

Gram Negatives

  1. Cocci
    1. Neisseria sp. meningococcus
    2. Moraxella
  2. Rods
    1. Lactose Fermenters
    2. Non-Lactose Fermenters

Lactose Fermenters

Lactose Fermenters
Indole
morphology

E. Coli

+
flat
Klebsiella - muccoid
Enterobacter -
muccoid
Citrobacter - flat
Arizona -

Non-Lactose Fermenters

Non-Lactose Fermenters Characteristics

Pseudomonas

usually strict aerobes, oxidase +, small
Salmonella, Shigella
Acinetobacter coccobac
Proteus
swarming
H. Flu
tiny, chocolate agar
Pasteurella

Gram Positives

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

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)

Source

7/2/09 PANI