Objective: To determine the frequency of multiresistant bacteria Carriers (BM) and its profile of resistance in critical areas (ICU-INCU) in a public hospital in northern Peru (HRL). Material and methods: A cross-sectional observational study was conducted during February to May 2015, in 48 patients and 32 healthcare staff. 4 anatomical regions for sampling were considered and supplemented instruments with antibiotics were used for primary isolation of BM. The resistance phenotype was confirmed by Jailer's test, Modified Hodge and susceptibility to cefoxitin. Results: The frequencies of BM in patients and healthcare staff were 79.1% and 3.1% respectively; also 89.5% of patients were already carriers at the time of admission mainly from Emergency Service, being anorectal region the principal source of isolates with 75.0%. It also was determined that production of extended spectrum beta-la...