title: Genetic diversity of Staphylococcus aureus isolated from ovine intramammary infections in Norway.
abstract: Three hundred and eighty-four Staphylococcus aureus isolates obtained from mammary secretions from 332 ewes kept for meat production were typed by pulsed-field gel electrophoresis (PFGE). The ewes were from 242 flocks located in 13 counties distributed in four regions of Norway. In total, 64 different pulsotypes were identified, 31 of these were represented by a single isolate. Fifty-nine percent of the isolates belonged to one of five closely related pulsotypes. This group of pulsotypes occurred in all the counties. Although widely disseminated, the proportions of the prevalent and closely related pulsotypes differed between the regions. Nine pulsotypes were unique to single regions but the number of isolates belonging to each of these pulsotypes was low. Resistance to penicillin was found in only 3 of the 384 S. aureus isolates. These represented three different single banding patterns, not related to any of the prevalent pulsotypes found.
authors.affiliation: National Veterinary Institute, P.O. Box 8156 Dep., N-0033 Oslo, Norway. tormod.mork@vetinst.no
authors.forename: Tormod
authors.initials: T
authors.lastname: Mørk
authors.forename: Tore
authors.initials: T
authors.lastname: Tollersrud
authors.forename: Bjørg
authors.initials: B
authors.lastname: Kvitle
authors.forename: Hannah J
authors.initials: HJ
authors.lastname: Jørgensen
authors.forename: Steinar
authors.initials: S
authors.lastname: Waage
mesh_terms: D000818:Animals; D004269:DNA, Bacterial / Q000032:analysis; D024881:Drug Resistance, Bacterial; D016521:Electrophoresis, Gel, Pulsed-Field / Q000662:veterinary; D005260:Female; D014644:Genetic Variation; D005838:Genotype; D008413:Mastitis / Q000382:microbiology / Q000662:veterinary*; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D009664:Norway / Q000453:epidemiology; D010403:Penicillin Resistance; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology / Q000382:microbiology*; D013203:Staphylococcal Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000235:genetics* / Q000302:isolation & purification
chemical_list: D004269:DNA, Bacterial