title: Nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA) among Swiss veterinary health care providers: detection of livestock- and healthcare-associated clones.
abstract: We screened a total of 340 veterinarians (including general practitioners, small animal practitioners, large animal practitioners, veterinarians working in different veterinary services or industry), and 29 veterinary assistants for nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus pseudintermedius (MRSP) at the 2012 Swiss veterinary annual meeting. MRSA isolates (n = 14) were detected in 3.8 % (95 % CI 2.1 - 6.3 %) of the participants whereas MRSP was not detected. Large animal practitioners were carriers of livestock-associated MRSA (LA-MRSA) ST398-t011-V (n = 2), ST398-t011-IV (n = 4), and ST398-t034-V (n = 1). On the other hand, participants working with small animals harbored human healthcare-associated MRSA (HCA-MRSA) which belonged to epidemic lineages ST225-t003-II (n = 2), ST225-t014-II (n = 1), ST5-t002-II (n = 2), ST5-t283-IV (n = 1), and ST88-t186-IV (n = 1). HCA-MRSA harbored virulence factors such as enterotoxins, β-hemolysin converting phage and leukocidins. None of the MRSA isolates carried Panton-Valentine leukocidin (PVL). In addition to the methicillin resistance gene mecA, LA-MRSA ST398 isolates generally contained additional antibiotic resistance genes conferring resistance to tetracycline [tet(M) and tet(K)], trimethoprim [dfrK, dfrG], and the aminoglycosides gentamicin and kanamycin [aac(6')-Ie - aph(2')-Ia]. On the other hand, HCA-MRSA ST5 and ST225 mainly contained genes conferring resistance to the macrolide, lincosamide and streptogramin B antibiotics [erm(A)], to spectinomycin [ant(9)-Ia], amikacin and tobramycin [ant(4')-Ia], and to fluoroquinolones [amino acid substitutions in GrlA (S84L) and GyrA (S80F and S81P)]. MRSA carriage may represent an occupational risk and veterinarians should be aware of possible MRSA colonization and potential for developing infection or for transmitting these strains. Professional exposure to animals should be reported upon hospitalization and before medical intervention to allow for preventive measures. Infection prevention measures are also indicated in veterinary medicine to avoid MRSA transmission between humans and animals, and to limit the spread of MRSA both in the community, and to animal and human hospitals.
authors: Laboratory Laupeneck, Bern.
authors: K
authors: K
authors: Wettstein Rosenkranz
authors: Laboratory Laupeneck, Bern.
authors: E
authors: E
authors: Rothenanger
authors: Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern.
authors: I
authors: I
authors: Brodard
authors: Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern.
authors: A
authors: A
authors: Collaud
authors: Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern.
authors: G
authors: G
authors: Overesch
authors: Laboratory Laupeneck, Bern.
authors: B
authors: B
authors: Bigler
authors: Department of Infectious Diseases, Bern University Hospital and University of Bern, Bern, Switzerland.
authors: J
authors: J
authors: Marschall
authors: Institute of Veterinary Bacteriology, Vetsuisse Faculty, University of Bern, Bern.
authors: V
authors: V
authors: Perreten
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D003428:Cross Infection / Q000453:epidemiology / Q000382:microbiology; D003430:Cross-Sectional Studies; D005838:Genotype; D006801:Humans; D058751:Livestock / Q000382:microbiology; D055624:Methicillin-Resistant Staphylococcus aureus / Q000187:drug effects / Q000235:genetics / Q000302:isolation & purification*; D008826:Microbial Sensitivity Tests; D009296:Nasal Cavity / Q000382:microbiology*; D015995:Prevalence; D013203:Staphylococcal Infections / Q000453:epidemiology* / Q000382:microbiology* / Q000662:veterinary; D013557:Switzerland / Q000453:epidemiology; D018634:Veterinarians / Q000706:statistics & numerical data*
chemical_list: D000900:Anti-Bacterial Agents
keywords: Antibiotika-Resistenz; Genotypisierung; Mensch; Nase; Prävalenz; S. pseudintermedius; Staphylococcus aureus; antibiotic resistance; genotyping; human; mecA; nose; prevalence