Objective: To determine the clinical and microbiological characteristics of seven (7) cases of New Delhi MBL (NDM)producing Klebsiella pneumoniae nosocomial infections at the Hospital Geriátrico San Isidro Labrador (HG SIL) from February to May 2018. Materials and methods: A descriptive and retrospective study conducted in elderly people with urinary infections, pneumonia, sacral ulcers and surgical wound infection who received multiple non-protocolized antibiotic therapy. The methods used to detect MBLs in the Klebsiella pneumoniae isolates that showed decreased sensitivity to carbapenems were the phenylboronic acid-based (PBA) and ethylenediaminetetraacetic acid-based (EDTA) double disk tests. The identification of the NDM gene was performed by polymerase chain reaction at the Instituto Nacional de Salud. Results: In total, the seven cases were positive for the NDM gene and resistant ...