files of hospitalized patients who presented surgical site infections during the 2015-2016 in the Obstetrics-Gynecology and Pediatrics Hospital No. 31 of the Mexican Institute of Social Security (IMSS) in Mexicali, Baja California.After authorization by the Local Research Committee and the corresponding hospital authorities, we carried out an exhaustive search in the registry of the clinical file of our institution, locating the files with diagnosis of