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Table 6 Antimicrobial susceptibility of E. coli and Klebsiella spp. isolated from bovine clinical mastitis

From: Udder pathogens and their resistance to antimicrobial agents in dairy cows in Estonia

  E. coli Klebsiella spp.
Disc content in μg n S*
(%)
I *
(%)
R*
(%)
n S*
(%)
I*
(%)
R*
(%)
Ampicillin 10 μg 201 68.7 7.0 24.3 39 15.4 7.7 76.9
Cefaperazone75 μg 137 100 0 0 32 100 0 0
Tetracycline 30 μg 184 77.8 8.7 13.5 39 79.6 10.2 10.2
Trimethoprim/sulfa 1.25/23.75 μg 191 84.3 3.7 12.0 40 97.5 0 2.5
Gentamycin 10 μg 161 94.3 2.5 2.2 40 95.0 0 5.0
Streptomycin 300
μg
154 78.6 5.8 15.6 37 73.0 8.1 18.9
Neomycin 30 μg 155 72.9 20.6 6.5 37 83.8 13.5 2.7
Enrofloxacin 5 μg 185 98.4 0 1.6 37 100 0 0
  1. * Proportion of susceptible (S), intermediate susceptibility (I) and resistant (R) isolates
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