From May to Sept 2012, 847 patients were admitted to the 6 ICUs; 261 remained for ≥ 48 hours and 201 were screened. Overall, 359 RS, 270 TA and 264 PS were taken and AB was isolated in 5.6%, 8.1% and 1.1% of them, respectively, with a total of 53 AB. All the strains were resistant to carbapenems. Of the 201 screened patients, 59.2% were male, the median age was 65 years (IQR 50-75), median Charlson and APACHE II scores were 5 (IQR 3-6) and 13 (IQR 9-17), respectively. Commonest causes for ICU admission were respiratory failure (32.3%) and post surgery (30.2%). Fourteen patients (7%) were found to be AB colonized at ICU admission, whereas 9 (4.5%) became colonized during ICU stay within a median of 7 days (IQR 6-10). Significant differences between AB colonized and non-colonized patients at ICU admission were found for septic shock (21.4% vs. 4.3%) and prior antibiotic therapy (78.6% vs. 43.3%).