Gram-positive

• Group A,B,C,G Streptococci
• S. pneumoniae
• Viridans Streptococci

Gram-negative

• Most Enterobacteriaceae
• H. influenzae
• M catarrhalis
• Pasteurella species

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