Gram positive

•  Staphylococci including many MRSA

Gram negative

•  M. catarrhalis

•  Acinetobacter spp

• Stenotrophomonas maltophilia

• Brucella spp

Other

•  Atypicals including Mycoplasma, Chlamydophila

• Richettsia spp

• Coxiella burnetii

•  Some Mycobacteria