Classification: Narrow Spectrum

Gram positive

•  MSSA

•  Some coagulase-negative Staphylococci (cloxacillin-susceptible)

•  Streptococci (except resistant Streptococcus pneumoniae)

Gram negative

•  E. coli

•  Klebsiella

•  Proteus

Anaerobic

•  Peptostreptococci