title: Detection and characterization of methicillin-resistant Staphylococcus pseudintermedius in healthy dogs in La Rioja, Spain.
abstract: The objective was to identify the methicillin-resistant coagulase-positive staphylococci (MRCoPS) nasal carriage rate of healthy dogs in La Rioja (Spain) and to characterize the recovered isolates by different molecular techniques. Nasal samples from 196 dogs were obtained (98 household-dogs, 98 pound-dogs). Isolates were identified and characterized by spa-, SCCmec- and MLST-typing, SmaI-PFGE, antimicrobial susceptibility, determination of antimicrobial resistance and toxin genes profiling. S. pseudintermedius was the only species recovered. Nine methicillin-resistant S. pseudintermedius (MRSP) were obtained from 9 of 196 sampled dogs (8% pound-dogs, 1% household-dogs). MRSP isolates were typed (MLST/PFGE/spa/SCCmec) as: ST71/A/t02/II-III (7 isolates), ST92/C/t06/V (1 isolate), and ST26/B/non-typable/non-typable (1 isolate). All MRSP were resistant to [resistance gene/number isolates]: β-lactams [mecA+blaZ/9], tetracycline [tet(K)/7, tet(M)/2], macrolides and lincosamides [erm(B)/9], aminoglycosides [aacA-aphD+aadE+aphA-3/9], and co-trimoxazol [dfr(G)/9]. Eight MRSP isolates showed also resistance to fluoroquinolones and amino acid changes in GyrA [Ser84Leu+Glu714Lys, 7 isolates; Ser84Leu, 1 isolate] and GrlA [Ser80Ile, 8 isolates] proteins were detected. The remaining isolate was chloramphenicol resistant and harboured cat(pC221) gene. All MRSP isolates harboured the aadE-sat4-aphA-3 multiresistance-gene-cluster linked to erm(B) gene as well as the siet, si-ent and lukS/F-I toxin genes. MRSP is a moderately common (4.6%) colonizer of healthy dogs in Spain. A major MRSP lineage (ST71) was detected and its future evolution should be tracked.
authors: Área Bioquímica y Biología Molecular, Universidad de La Rioja, Logroño, Spain.
authors: Elena
authors: E
authors: Gómez-Sanz
authors: Carmen
authors: C
authors: Torres
authors: Carmen
authors: C
authors: Lozano
authors: Yolanda
authors: Y
authors: Sáenz
authors: Myriam
authors: M
authors: Zarazaga
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000494:pharmacology; D001426:Bacterial Proteins / Q000235:genetics*; D015373:Bacterial Typing Techniques; D001483:Base Sequence; D002353:Carrier State / Q000382:microbiology / Q000662:veterinary*; D004285:Dogs / Q000382:microbiology*; D024901:Drug Resistance, Multiple, Bacterial; D016521:Electrophoresis, Gel, Pulsed-Field; D005798:Genes, Bacterial; D008040:Genetic Linkage; D016106:Methicillin Resistance; D008780:Methyltransferases / Q000235:genetics; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D058885:Multilocus Sequence Typing; D013030:Spain / Q000453:epidemiology; D013203:Staphylococcal Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D013210:Staphylococcus / Q000145:classification / Q000187:drug effects / Q000302:isolation & purification*
chemical_list: D000890:Anti-Infective Agents; D001426:Bacterial Proteins; C548250:MecA protein, Staphylococcus pseudintermedius; D008780:Methyltransferases; C431709:ErmA protein, Bacteria