Ertapenem (ETP)

Ertapenemis structurally very similar to meropenem in that it possesses a 1-β-methyl group. Ertapenem has been designed to be effective against Gram-negative and Gram-positive bacteria. It is not active against MRSA, ampicillin-resistant enterococci, Pseudomonas aeruginosa, or Acinetobacter species. Ertapenem also has clinically useful activity against anaerobic bacteria.

Ertapenem has been shown to be active against most isolates of the following micro-organisms in vitro and in clinical infections. It should not be used as empirical treatment for hospital-acquired infections because of its lack of activity against Pseudomonas aeruginosa. In practice, it is reserved primarily for use against Extended spectrum beta-lactamase (ESBL)-producing and high level AmpC-producing Gram-negative bacteria.