Original scientific paper

https://doi.org/10.1515/aiht-2017-68-2946

Reduced susceptibility to disinfectants of Acinetobacter baumannii biofilms on glass and ceramic

Tomislav Ivanković ; University of Zagreb, Faculty of Science, Department of Biology, Zagreb, Croatia
Ivana Goić-Barišić ; University of Split School of Medicine, Hospital Centre Split, Department of Clinical Microbiology, Split, Croatia
Jasna Hrenović ; University of Zagreb, Faculty of Science, Department of Biology, Zagreb, Croatia

Abstract

The aim of this study was to determine the susceptibility of hospital and environmental Acinetobacter baumannii isolate biofilms on ceramics and glass to common disinfectants benzalkonium chloride and chlorhexidine. For this purpose wedeveloped a new method for biofilm cultivation and quantification on ceramics. The biofilm bacteria were more resistant to disinfectants than the planktonic populations, as more than 50 % of the biofilm population and none of the planktonic population survived 5-minute exposure. Furthermore, biofilm populations on ceramic tiles were significantly more resistant than those on glass coverslips, even though the amount of biofilm was practically the same on ceramics and glass. The reason for reduced susceptibility of A. baumannii biofilms on ceramics may be related to surface/disinfection interactions. Our findings suggest that biofilms on ceramic surfaces can be an important source of A. baumannii infection in hospital environments

Keywords

benzalkonium chloride; chlorhexidine, hospital infections, surfactants

Hrčak ID:

183256

URI

https://hrcak.srce.hr/183256

Publication date:

20.6.2017.

Article data in other languages: croatian

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