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Table 2 Distribution of antimicrobial resistance categorized by antimicrobial class among equine Staphylococcus samples submitted to the University of Kentucky veterinary diagnostic laboratory, 1993–2009

From: An epidemiologic study of antimicrobial resistance of Staphylococcus species isolated from equine samples submitted to a diagnostic laboratory

Antimicrobial class Drug AMRa samples AMRa % 95% CIb MDRc samples MDRc % 95%CIb
Aminoglycosides   516/1710 30.2 28.0, 32.4 377/1710 22.1 20.1, 24.1
  Neomycin 53/1582 3.4 2.5, 4.4 46/1582 2.9 2.1, 3.9
Kanamycin 486/1682 28.9 26.7, 31.1 369/1682 21.9 20.0, 24.0
Streptomycin 59/287 20.6 16.0, 25.7 28/287 9.8 6.6, 13.8
Gentamicin 369/1622 22.8 20.7, 24.9 270/1622 16.7 14.9, 18.6
β-lactams   841/1710 49.2 46.8, 51.6 402/1710 23.5 21.5, 25.6
  Penicillin 814/1539 52.9 50.4, 55.4 396/1539 25.7 23.6, 28.0
Oxacillin 254/1634 15.6 13.8, 17.4 235/1634 14.4 12.7, 16.2
Amoxicillin/Clavulanic Acid 115/1644 7.0 5.8, 8.3 107/1644 6.5 5.4, 7.8
Macrolides   292/1668 17.5 15.7, 19.4 249/1668 14.9 13.3, 16.7
  Erythromycin 292/1668 17.5 15.7, 19.4 249/1668 14.9 13.3, 16.7
Sulfonamides   463/1645 28.2 26.0, 30.4 372/1645 22.6 20.6, 24.7
  Sulfonamide 488/1702 28.7 26.5, 30.9 372/1702 21.9 19.9, 24.0
Trimethoprim-sulfadiazine 330/1355 24.4 22.1, 26.7 297/1355 21.9 19.7, 24.2
Lincosamides   28/970 2.9 1.9, 4.2 25/970 2.6 1.7, 3.8
  Lincomycin 28/970 2.9 1.9, 4.2 25/970 2.6 1.7, 3.8
Aminocoumarins   141/1578 8.9 7.6, 10.6 31/1578 2.0 1.3, 2.8
  Novobiocin 141/1578 8.9 7.6, 10.6 31/1578 2.0 1.3, 2.8
Cephalosporins   63/1711 3.7 2.8, 4.7 63/1711 3.7 2.8, 17.1
  Cephalothin 48/1692 2.8 2.1, 3.7 48/1692 2.8 2.1, 3.7
Fluoroquinolones   1/25 4.0 0.1, 20.4 1/25 4.0 0.1, 20.4
  Enrofloxacin 1/24 4.2 0.1, 21.1 1/24 4.2 0.1, 21.1
Tetracyclines   451/1682 26.8 24.7, 29.0 326/1682 19.4 17.5, 21.4
  Tetracycline 451/1682 26.8 24.7, 29.0 326/1682 19.4 17.5, 21.4
Polypeptides   45/1649 2.7 2.0, 3.6 36/1649 2.2 1.5, 3.0
  Bacitracin 45/1649 2.7 2.0, 3.6 36/1649 2.2 1.5, 3.0
  1. aAMR: Antimicrobial Resistance
  2. b95% Confidence Interval
  3. cMDR: Multidrug Resistance