Gram positive

• Streptococci

• MSSA (caution resistance develops on therapy)

• some Enterococcus faecalis (not first line)

Gram negative

• Most Enterobacteriaceae

• N. meningitidis

• Moraxella

• H. influenzae

• Legionella

• Pasteurella

• Pseudomonas

• Stenotrophomonas

Anaerobic

• Prevotella

• Peptostreptococci

Other

• Mycoplasma

• Chlamydophila