title: Comparison of the phenotypic antimicrobial resistances and spa-types of methicillin-resistant Staphylococcus aureus (MRSA) isolates derived from pigs in conventional and in organic husbandry systems.
abstract: The purposes of this study were to identify differences in the phenotypic resistance to antimicrobials and in the spa-types between 273 methicillin-resistant Staphylococcus aureus (MRSA) isolates derived from conventional (n = 21) versus organic pig farms (n = 10) located in Germany. The susceptibility of the isolates against 19 antimicrobial agents was tested and then compared between the two different husbandry systems. A statistically significant difference was observed between the MRSA strains isolated on conventional and on organic pig farms for the antimicrobials tilmicosin (61.8% vs. 40.0%; OR: 2.42), clindamycin (63.5% vs. 45.7%; OR: 2.06), gentamicin (14.7% vs. 34.3%; OR: 0.33), apramycin (3.8% vs. 22.9%; OR: 0.13) and enrofloxacin (13.9% vs. 34.3%; OR: 0.31). Finally, the results of the susceptibility testing were analysed in order to determine the resistance pattern per isolate. Among the tested isolates a kind of"basic resistance pattern of MRSA"to penicillin, ampicillin and tetracycline was identified. The predominant spa-types in both groups were t011 and t034. Less frequently detected spa-types were t1430, t1197, t2510, t779, t1451 and t1250.
authors.forename: Vitus
authors.initials: V
authors.lastname: Buntenkoetter
authors.forename: Thomas
authors.initials: T
authors.lastname: Blaha
authors.forename: Regina
authors.initials: R
authors.lastname: Tegeler
authors.forename: Alexandra
authors.initials: A
authors.lastname: Fetsch
authors.forename: Maria
authors.initials: M
authors.lastname: Hartmann
authors.forename: Lothar
authors.initials: L
authors.lastname: Kreienbrock
authors.forename: Diana
authors.initials: D
authors.lastname: Meemken
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D003430:Cross-Sectional Studies; D004783:Environmental Microbiology; D005260:Female; D008297:Male; D055624:Methicillin-Resistant Staphylococcus aureus / Q000145:classification / Q000187:drug effects* / Q000235:genetics* / Q000302:isolation & purification; D008826:Microbial Sensitivity Tests; D058889:Molecular Typing; D009296:Nasal Cavity / Q000382:microbiology; D010641:Phenotype; D013203:Staphylococcal Infections / Q000382:microbiology* / Q000662:veterinary*; D013205:Staphylococcal Protein A / Q000235:genetics; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology*
chemical_list: D000900:Anti-Bacterial Agents; D013205:Staphylococcal Protein A