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Table 5 Antimicrobial susceptibility (%) of S. pseudintermedius , S. aureus , beta haemolytic streptococci and enterococci in non-repeated samples

From: Characterisation of bacterial growth and antimicrobial susceptibility patterns in canine urinary tract infections

Antimicrobial Staphylococcus pseudintermedius Staphylococcus aureus Beta-hemolytic streptococci Enterococci
(n = 60) (n = 10) (n = 33) (n = 55)
BP S % S BP S % S BP S % S BP S % S
Penicillin β-lacta 10.0 β-lact 30.0 ≤ 0.12 100 ≤ 8 NR
Ampicillin β-lact 10.0 β-lact 30.0 ≤ 0.25 NR ≤ 8 87.0
Amoxicillin/Clavulanic acid ≤ 8 96.7 ≤ 8 100 ≤ 8 100 ≤ 8 82.6
Cephalothin ≤ 2 98.3 ≤ 2 100 ≤ 2 100 ≤ 2 13.0
Oxacillin ≤ 0.25 NRb ≤ 2 100 - - - -
Gentamicin ≤ 2 98.3 ≤ 2 100 ≤ 2 0.0 ≤ 2 30.4
Erythromycin ≤ 0.5 86.7 ≤ 0.5 100 ≤ 0.25 NR ≤ 0.5 34.8
Enrofloxacin ≤ 0.5 98.3 ≤ 0.5 100 ≤ 0.5 15.2 ≤ 0.5 47.8
Tetracycline ≤ 4 66.7 ≤ 4 90.0 ≤ 2 63.6 ≤ 4 65.2
Trimethoprim/Sulphametoxazole ≤ 2/38 95.0 ≤ 2/38 100 ≤ 2/38 100 ≤ 2/38 87.0
Nitrofurantoin ≤ 32 100 ≤ 32 100 ≤ 32 100 ≤ 32 82.6
  1. Breakpoints for susceptibility (BP S) (mg/L) are indicated. The number of samples is shown inside brackets. Results from the susceptibility testing of one beta-haemolytic streptococcus isolate were lost and are not presented.
  2. aβ-lact = beta-lactamase production.
  3. bNR = not relevant since the BP is outside of the range of concentrations tested.