Gram positive

• Staphylococci including many MRSA

• S. pneumoniae

Gram negative

• M. catarrhalis

• H. influenzae

• Brucella

Anaerobic

• Actinomyces

• *Prevotella

• Non- difficile Clostridia

• Peptostreptococci

Other

• Atypicals including Mycoplasma, Chlamydophila

• Rickettsia

• Borrelia

• Some Mycobacteria