Abstract: Objective To investigate the epidemiological features of a suspected healthcare-associated infection outbreak of carbapenem-resistant Acinetobacter baumannii（CRAB） in Pediatric Intensive Care Unit（PICU）,and facilitate the prevention and control of hospital associated infection effectively. Methods Subjects infected with CRAB in PICU from May 20th 2021 to June 6th 2021 were investigated epidemiologically and environmental hygiene was monitored. Risk factors were analyzed and corresponding preventive control methods were taken. Results CRAB was detected in 6 cases with 4 cases being identified as colonization and 2 cases as nosocomial infection. The qualified rate of bacterial count on the surfaces of objects was 44.44%（16/36）. Univariate analysis revealed that coma,endotracheal intubation,bronchoscopy and conventional sputum suction were relevant risk factors. There were no new infected cases occurred in PICU after a series control methods were taken since June 7th 2021. Conclusion This CRAB HAI may be spread transversely through environmental surfaces and hands of medical staffs in the process of sputum suction with bronchoscopy. Cleaning and disinfection of the surfaces of objects and hand hygiene management in PICU are vital for preventing hospital infection.

Key words: Intensive Care Units, Pediatric, Acinetobacter Baumannii, Disease Outbreak, Infection Control