title: Descriptive analysis of antibiotic-resistant patterns of methicillin-resistant Staphylococcus aureus (MRSA) st398 isolated from healthy swine.
abstract: BACKGROUND
  Livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) such as the MRSA ST398 strain has spread all over the world and the most worrying aspect of this fact appears to be its capacity to easily spread to humans. The excessive use of antibiotics has made swine a reservoir of MRSA. The aim of the present study was to determine the antibiotic resistance profile of MRSA samples isolated from healthy swine of the island of Tenerife (Spain).
  
  
  METHODS
  A total of 256 MRSA isolates from swine samples and five MRSA isolates from pig worker samples were investigated for MRSA antibiotic resistant patterns.
  
  
  RESULTS
  Analysis of the susceptibility status of MRSA pig isolates revealed that 39 isolates were resistant to one antibiotic, 71 isolates were resistant to two antibiotics and 96 isolates were resistant to three or more antibiotics. SCCmec typing revealed the presence of types IV and V. Isolates having SCCmec IV had an increased resistance to the antimicrobial agents tested than those having SCCmec V. We observed significant differences when comparing the most common resistance patterns and SCCmec type.
  
  
  CONCLUSIONS
  MRSA isolated from humans showed similar resistance to those isolated from pigs, excepting erythromycin, since all the workers' isolates were sensitive to this antibiotic. The evolution of new MRSA clones has emphasized the need for infection control practices in animals and humans in close contact.
authors.affiliation: Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands 38071, Spain. anaimorcillo@gmail.com.
authors.forename: Ana
authors.initials: A
authors.lastname: Morcillo
authors.affiliation: University Hospital of the Canary Islands, San Cristóbal de La Laguna, Tenerife, Canary Islands 38320, Spain. bcastrohdez@yahoo.es.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Castro
authors.affiliation: Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands 38071, Spain. crrodrig@ull.es.
authors.forename: Cristobalina
authors.initials: C
authors.lastname: Rodríguez-Alvarez
authors.affiliation: Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands 38071, Spain. rabreu@ull.es.
authors.forename: Rossana
authors.initials: R
authors.lastname: Abreu
authors.affiliation: Nuestra Señora de la Candelaria University Hospital, Santa Cruz de Tenerife 38010, Spain. aagujai@gobiernodecanarias.org.
authors.forename: Armando
authors.initials: A
authors.lastname: Aguirre-Jaime
authors.affiliation: Department of Preventive Medicine and Public Health, University of La Laguna, Canary Islands 38071, Spain. angarias@ull.es.
authors.forename: Angeles
authors.initials: A
authors.lastname: Arias
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D003430:Cross-Sectional Studies; D024901:Drug Resistance, Multiple, Bacterial; D000067565:Farmers; D006801:Humans; D008712:Methicillin / Q000494:pharmacology*; D055624:Methicillin-Resistant Staphylococcus aureus / Q000187:drug effects*; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D013030:Spain; D034421:Sus scrofa / Q000382:microbiology*
chemical_list: D000900:Anti-Bacterial Agents; D008712:Methicillin