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Gram (+) Organisms

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Staphylococcus

• Staph. aureus
  • MSSA
  • MRSA
• Staph. epidermidis

Streptococcus

• Alpha Hemolytic​
  • Strep viridans
  • Strep pneumoniae (aka "pneumococcus")
• Beta Hemolytic
  • Strep. pyogenes (Group A)
  • Strep. agalactiae (Group B)
  • Group C, F, G
• Gamma Hemolytic
  • Strep. bovis aka Strep. gallolyticus (Group D)

Enterococcus

• E. faecalis
• E. faecium​

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Gram (-) Organisms

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Acinetobacter

Pseudomonas

Haemophilus influenzae

Moraxella catarrhalis

Neisseria meningitidis (aka "meningococcus")

Enterobacteriaceae Group
E. Coli
Klebsiella
Enterobacter
Serratia
Proteus
Citrobacter

Stenotrophomonas maltophilia

Legionella pneumophila
​

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Atypicals

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Chlamydia

Mycoplasma
​
​Rickettsiae

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Anaerobes

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G(-) Rods
Bacteroides
Prevotella
Porphyromonas
Fusobacterium

G+ Non-Spore Forming Rods
Propionibacterium
Actinomyces
Lactobacillus

G+ Spore-Forming Rods
Clostridium

G+ Cocci
Peptostreptococcus

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Fungi

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Yeasts
​Candida
Trichosporon

Dimorphic (aka "endemic")
Histoplasma
Coccidiodes
Blastomyces
Paracoccidiodes
Sporothrix

Molds
Aspergillus
Fusarium
Scedosporium
Zygomycetes/Mucorales
Dematiaceous Molds