Thanks for your query.
I think as culture was done sensitivity test should have been done. Start the sensitive antibiotics among them with lowest MIC (minimum inhibitory concentration). Usually Klebsiella is a notorious organism because of increasing drug resistance
. Carbepenem group of drugs are the choice for klebsiella like imipenem
. These are injectables. Among the oral only drug is feropenem. But you should start as per your sensitivity report. I think with proper treatment you will be cured.