Gram positive
- Methicillin-susceptible Staphylococcus aureus (MSSA)
- Coag-negative Staphylococci
- Staph. epidermidis
- Staph. lugdunesis
- Staph. saprophyticus
- Staph. anginosus group
- viridans Streptococci
- Group A,B,C,F,G Streptococci
- *Strep. pneumoniae
- Arcanobacter species
Gram negative
- Susceptible E. coli
- Susceptible Klebsiella oxytoca and pneumoniae
- Susceptible Proteus mirabilis
- Kingella species
Anaerobic
- P. acnes
- Peptostreptococci
Notable exceptions
- H. influenzae
- Enterococci
- MRSA
- Atypicals
- Many gram negatives
- Most anaerobes