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Acinetobacter baumannii is an important opportunistic pathogen and responsible for a wide range of nosocomial infections including pneumonia, bacteremia, meningitis, urinary tract, burn and wound infections. These infections often occur in critically ill patients and usually after a relatively extended hospitalization period in intensive care units (ICUs) [1-3]. Previous studies in some hospitals highlighted the critical role of environmental contaminated inanimate objects and surfaces such as supply carts, floors, infusion pumps and ventilator touch pads by A. baumannii in the transmission of the infection to patients [4-6]. The extraordinary ability of A. baumannii to adapt to variable conditions like tolerance to desiccation and its remarkable ability to develop resistance to various antibiotics has led to the emergence of multidrug-resistant (MDR) A. baumannii strains which contribute to the persistence of these organisms in the hospital environment for extended periods of times [7-9]. Hospital outbreaks caused by A. baumannii are known to be associated with contaminated environments as well as healthcare personnel [6, 8-10]. An estimated 20% to 40% of nosocomial infections were attributed to cross-contamination via the hands of healthcare personnel, as a result of direct contact with patients or indirectly by contaminated inanimate surfaces [6]. Here, we investigated the potential cross-contamination of A. baumannii between the patients and their environment in EbneSina Hospital, Tehran, Iran. We also compared the antibiotic resistance patterns and the genetic fingerprints of the isolates obtained from various surfaces as well as the A. baumannii-infected patients.

journal of medical microbiology and infectious diseases

Contribution of Contaminated Environmental Surfaces to the Transmission of Multidrug-resistant Acinetobacter baumannii in Special Care Units of a Hospital in Tehran, Iran