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Table 5 Antimicrobial susceptibility of streptococci isolated from bovine clinical mastitis

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

  Str. agalactiae Str. dysgalactiae Str. uberis
Disc content in μg n S*
(%)
I* (%) R* (%) n S*
(%)
I*
(%)
R*
(%)
n S*
(%)
I*
(%)
R*
(%)
Ampicillin 10 μg 162 100 - 0 111 100 0 0 265 99.6 0 0.4
Penicillin 10 μg 168 100 - 0 111 100 0 0 267 99.6 0 0.4
Cephalothin 30 μg 143 100 - 0 101 100 0 0 254 99.6 0 0.4
Clindamycin 2 μg 161 91.9 1.9 6.2 115 92.2 0 7.8 273 92 1.4 6.6
Erythromycin 15 μg 77 96.1 2.6 1.3 60 88.3 5 6.7 134 89.6 2.2 8.2
Tetracycline 30 μg 151 78.1 7.3 14.6 90 48.9 18.9 32.2 234 79.9 3.4 19.7
Trimethoprim/sulfa
1.25/23.75 μg
140 93.6 0 6.4 103 99 0 1 223 95.9 0.9 3.2
Gentamycin 10 μg 143 63.6 11.9 24.5 88 88.6 0 11.4 210 71.9 9.5 18.6
  1. * Propotion of susceptible (S), intermediate susceptibility (I) and resistant (R) isolates
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