title: Biofilms of clinical strains of Staphylococcus that do not contain polysaccharide intercellular adhesin.
abstract: Staphylococcus aureus and coagulase-negative staphylococci, primarily Staphylococcus epidermidis, are recognized as a major cause of nosocomial infections associated with the use of implanted medical devices. The capacity of S. epidermidis to form biofilms, allowing it to evade host immune defence mechanisms and antibiotic therapy, is considered to be crucial in colonizing the surfaces of medical implants and dissemination of infection. It has previously been demonstrated that the biofilm of a model strain S. epidermidis RP62A comprises two carbohydrate-containing moieties, a polysaccharide having a structure of a linear poly-N-acetyl-(1-->6)-beta-D-glucosamine and teichoic acid. In the present paper we show that, unlike this model strain, certain clinical isolates of coagulase-negative staphylococci produce biofilms that do not contain detectable amounts of poly-N-acetyl-(1-->6)-beta-D-glucosamine. In contrast to that of S. epidermidis RP62A, these biofilms are not detached with metaperiodate, while proteinase K causes their partial dispersal.
authors.affiliation: Laboratoire de Recherche sur les Biomatériaux et les Biotechnologies INSERM ERI 002, Université du Littoral-Côte d'Opale, Boulogne-sur-mer, France.
authors.forename: Grigorij
authors.initials: G
authors.lastname: Kogan
authors.forename: Irina
authors.initials: I
authors.lastname: Sadovskaya
authors.forename: Philippe
authors.initials: P
authors.lastname: Chaignon
authors.forename: Ali
authors.initials: A
authors.lastname: Chokr
authors.forename: Saïd
authors.initials: S
authors.lastname: Jabbouri
mesh_terms: D018441:Biofilms / Q000254:growth & development*; D006801:Humans; D011135:Polysaccharides, Bacterial / Q000378:metabolism*; D013210:Staphylococcus / Q000378:metabolism / Q000502:physiology*
chemical_list: D011135:Polysaccharides, Bacterial; C113579:polysaccharide intercellular adhesin