Answer
No reliable activity should be assumed. Pseudomonas aeruginosa is generally resistant, and MRSA is resistant to beta-lactam antibiotics.
Sources for this answer
- Ertapenem 1 g powder for concentrate for solution for infusion — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.