Encapsulation, slime production and surface hydrophobicity of coagulase-negative staphylococci
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چکیده
Infections associated with prosthetic implants or medical devices are most commonly caused by coagulase-negative staphylococci (CNS) [1]. The ability of CNS to produce slime has been suggested to play a critical role in the adhesion onto surfaces of implants and medical devices [2] and in the course of medical device-associated infections [3]. Staphylococcus aureus, the pathogenic counterpart of CNS, can be encapsulated [4]. Such strains possessed increased virulence in comparison with their non-encapsulated variant strains [5,6]. Characterization of CNS has been advocated [7,8], but no special attention has been given to the presence of a capsule, although encapsulated CNS have been reported [9]. Bacterial adhesion onto surfaces is also regarded to be an important virulence factor [10]. Bacterial interaction with mammalian cells and artificial surfaces is promoted by the hydrophobicity of the bacterial cell surface [11-13]. After characterization of twenty one CNS, the presence of a capsule and the ability to produce extracellular slime were studied. In addition, the surface hydrophobicity of the strains was measured using a xylene-water system [14].
منابع مشابه
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تاریخ انتشار 2002