Gram positive:
- Staphylococci including many MRSA
- S. pneumoniae
Gram negative:
- M. catarrhalis
- H. influenzae
- Brucella
Anaerobic:
- Actinomyces
- Prevotella
- Non-difficile Clostridia
- Peptostreptococci
Other:
- Atypicals incl. Mycoplasma, Chlamydophila
- Rickettsia
- Borrelia
- Some mycobacteria