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Indoor and Built Environment
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Strains of Enterobacter cloacae Isolated in a Hospital Environment – Some Phenotypic and Genotypic Properties

Katarzyna Pancer

Wlodzimierz Gut

Szymon Fila

Agnieszka Trzcinska

National Institute of Hygiene, Warsaw, Poland

Anna Roszkowiak

Military Institute of Hygiene and Epidemiology, Pulawy, Poland

Agnieszka E. Laudy

Medical University of Warsaw

Teresa Wernik

University Hospital for Children, Warsaw, Poland

Ewa Mikulak

Aleksandra Gliniewicz

Hanna Stypulkowska-Misiurewicz

National Institute of Hygiene, Warsaw, Poland

The aim of this study was to characterise the 34 Enterobacter cloacae strains isolated from different places in a hospital, either from patients who were infected or colonised and from the body surface of German cockroaches (Blatella germanica) caught in hospitals. A number of factors were determined: the ability of E. cloacae strains to adhere to the HEp-2 cell line, their susceptibility to drugs, the activity of disinfectant agents to planktonic cells and effectiveness of those disinfectants to bacteria that are sessile on catheters as well as the Enterobacterial Repetitive Intergenic Consensus – Polymerase Chain Reaction (ERIC-PCR) profile of the strains. On the basis of a statistical analysis of all the phenotypic results we were able to distinguish a few clusters. The majority of them consisted of strains isolated from colonisation and infection of patients. Some clusters consisted of E. cloacae from all the test sites. Some strains showed similarities of their phenotypic properties as well as the ERIC-PCR profile. Epidemiological studies are continuing.

Key Words: Enterobacter cloacae • Virulence • Hospital environment

Indoor and Built Environment, Vol. 15, No. 1, 99-104 (2006)
DOI: 10.1177/1420326X06062372
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