title: Neuraminidase produces a decrease of adherence of slime-forming Staphylococcus aureus to gelatin-impregnated polyester fiber graft fabric: an experimental study.
abstract: Because slime-forming microorganisms are the major causative agents of graft infections, we aimed to investigate bacterial adherence in slime-forming and nonslime-forming Staphylococcus aureus and to determine the role of neuraminidase (NANase) on adherence to gelatin-impregnated polyester fiber graft fabric. An in vitro model was developed to quantitatively measure bacterial adherence to the surface of the graft. The grafts were divided into two groups - those colonized with slime-forming S. aureus and those colonized with nonslime-forming S. aureus. The grafts were put into sterile tubes and human plasma was instilled and incubated at 37 degrees C to perform fibrin deposition on the grafts. After 48 h of incubation, grafts were drained and inoculated with slime-forming or nonslime-forming S. aureus in triptic soy broth in the presence or absence of NANase. Following 36 h of incubation at 36 degrees C, grafts were vortexed and cultured to perform a colony count. Bacterial counts were expressed as total colony-forming units per square centimeter of graft. Slime-forming S. aureus had greater affinity with the graft compared with nonslime-forming S. aureus (P < 0.05). The adherence of slime-forming S. aureus was impaired by NANase treatment (P < 0.001) but NANase treatment of nonslime-forming S. aureus did not change the adherence to the graft (P > 0.05). These results show that slime plays an important role in the pathogenesis of vascular graft infection. Adherence of slime-forming S. aureus can be decreased by NANase treatment. This may have implications for the development of neuraminidase-embedded vascular grafts to diminish biomaterial-related infections.
authors.affiliation: Science and Technology Research and Development Center Laboratories, Adnan Menderes University, Aydin, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Sacar
authors.forename: Gokhan
authors.initials: G
authors.lastname: Onem
authors.forename: Ahmet
authors.initials: A
authors.lastname: Baltalarli
authors.forename: Suzan
authors.initials: S
authors.lastname: Sacar
authors.forename: Huseyin
authors.initials: H
authors.lastname: Turgut
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Goksin
authors.forename: Vefa
authors.initials: V
authors.lastname: Ozcan
authors.forename: Serhan
authors.initials: S
authors.lastname: Sakarya
mesh_terms: D000704:Analysis of Variance; D001422:Bacterial Adhesion / Q000187:drug effects*; D018441:Biofilms / Q000187:drug effects*; D001807:Blood Vessel Prosthesis / Q000382:microbiology*; D015169:Colony Count, Microbial; D005780:Gelatin; D006801:Humans; D009439:Neuraminidase / Q000008:administration & dosage / Q000494:pharmacology*; D011091:Polyesters; D016459:Prosthesis-Related Infections / Q000517:prevention & control; D013203:Staphylococcal Infections / Q000517:prevention & control; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology
chemical_list: D011091:Polyesters; D005780:Gelatin; D009439:Neuraminidase