Gram positive:

• Group A,B,C,G Streptococci

• MSSA

• Viridans Streptococci

Gram negative:

• Susceptible E. coli

• *Klebsiella *

• Proteus

Notable exceptions:

• H. influenzae

• Enterococci

• MRSA

• Atypicals

• Many gram negatives

• Anaerobes.