Nosocomial Infections: Multicenter Surveillance of Antimicrobial Resistance in Tehran During 2015 - 2017

background: rapid increase in nosocomial infections (nis) due to antibiotic resistant organisms is a global issue, which causes significant morbidity in both patients and healthcare professionals ultimately leading to an extra cost on health care systems. thus, studying nis is a public health priority. methods: the study was designed as a cross-sectional investigation between 2015 - 2017. inpatient cases of selected hospitals with nosocomial infections were included. demographics, source of infections, causative agents, and their antibiotic susceptibility through e-test method were collected. all data were analyzed using spss statistical software (version 19). results: a total of 168 patients with nis were identified. of the patients, 100 (59.5%) cases were male. the intensive care unit had the highest infection rate (n = 100 (59.5%)) and bronchoalveolar lavage (bal) (n = 58 (34.5%)) and acinetobacter (n = 76 (47.5%)) were the most common source and organism of ni. conclusions: results of this studyshowedthe dangerously high nosocomial infection rates, which necessitates considering surveillance of antibiotic usage and restriction of using broad spectrum antibiotics in infections.