Gram positive

• Group A,B,C,G Streptococci

• S. pneumoniae

• Viridans Streptococci

Gram negative

• Most Enterobacteriaceae

• H. influenzae

• M catarrhalis

• Pasteurella spp

Anaerobes

• Prevotella melaninogenica

• Clostridium (Not C. difficile)

• Peptostreptococci

Does not cover

• Enterococci

• B. fragilis

• Pseudomonas and other more resistant gram negatives

• ESBL or AmpC producing Enterobacteriaceae

• Listeria

• Not the agent of choice for Staphylococcal infections