title: Staphylococcus aureus nasal isolates from healthy individuals cause highly variable host cell responses in vitro: the Tromsø Staph and Skin Study.
abstract: Studies on Staphylococcus aureus populations colonizing the nasal cavity reveal that some bacterial strains are more common, while others are rarely found. This study included five isolates with the most common spa types and five isolates with rare spa types from healthy population. Selected phenotypic traits and genomic content among nasal S. aureus isolates were compared. Besides the rather similar growth rates, our data revealed a high diversity among isolates; that is, in biofilm formation, the ability to attach to and be internalized in keratinocytes as well as ability to induce pro- and anti-inflammatory cytokines. The results showed that S. aureus isolates from healthy hosts are phenotypically diverse and cause highly variable host cell responses. Therefore, generalizing the results from one S. aureus isolate to all is highly questionable.
authors.affiliation: Research group of Host-Microbe Interactions, Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Askarian
authors.forename: Maria
authors.initials: M
authors.lastname: Sangvik
authors.forename: Anne-Merethe
authors.initials: AM
authors.lastname: Hanssen
authors.forename: Lars
authors.initials: L
authors.lastname: Snipen
authors.forename: Johanna U E
authors.initials: JU
authors.lastname: Sollid
authors.forename: Mona
authors.initials: M
authors.lastname: Johannessen
mesh_terms: D000328:Adult; D001422:Bacterial Adhesion; D018441:Biofilms / Q000254:growth & development; D002353:Carrier State / Q000382:microbiology; D016207:Cytokines / Q000378:metabolism; D004705:Endocytosis; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D015603:Keratinocytes / Q000382:microbiology; D058889:Molecular Typing; D009296:Nasal Cavity / Q000382:microbiology*; D010641:Phenotype; D013203:Staphylococcal Infections / Q000382:microbiology; D013211:Staphylococcus aureus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D014774:Virulence
chemical_list: D016207:Cytokines
keywords: adhesion; cytokine induction; growth rate; internalization; keratinocytes