Gram positive

•  Unreliable against Staphylococci, Bacillus anthracis

Gram negative

•  Pseudomonas

•  Enterobacteriaceae

•  Neisseria

•  Haemophilus

•  Moraxella

•  Pasteurella

Anaerobes

•  Not reliable

Other

•  Atypicals including Legionella

Does not cover

•  Most gram positives

•  Streptococci

•  Enterococci

•  Stenotrophomonas

•  Anaerobes