Table 3

Antibiotic resistance patterns of bacteria isolated from upper respiratory samples

% resistant isolates
Bacterial species Growth level P AMP SXT CEF TE ENR MAR CN S C E RD
Escherichia coli Moderate/profuseN/A5030.52.133.3005.159.35.9N/AN/A
TotalN/A4226.22.930006.253.75.3N/AN/A
Pasteurella speciesModerate/profuseN/A8.612.15.64.317.405.7400N/AN/A
TotalN/A9.512.58.341607.142.90N/AN/A
Pseudomonas speciesModerate/profuseN/A87.562.968.249.337.55.39.440.656.2N/AN/A
TotalN/A8663.264.642.9252.95.436.858.6N/AN/A
Coagulase-negative staphylococciModerate/profuse21.8N/A3.76.75.613.52.91.913.709.41.9
Total19.8N/A6.24.47.79.34.11.310.5012.82.5
Streptococcus equi subspecies equi Moderate/profuse12.5N/A16.4036.8N/AN/A89.591.7009.1
Total6.1N/A13.8033.3N/AN/A91.192.701.57.7
Streptococcus equi subspecies zooepidemicus Moderate/profuse0N/A10.3079.5N/AN/A8092.12.606.5
Total1.9N/A12.4074N/AN/A8692.6215.9
TotalModerate/profuse23.936.618.67.12512.4216.849.96.118.230.2
Total24.332.217.78.620.7121.815.645.78.119.130.6
  • Moderate growth: colonies on sectors 1–3; profuse growth: colonies on all 4 sectors.

  • Results are shown as percentage of resistant isolates per total number of isolates tested.

  • AMP, ampicillin; C, chloramphenicol; CEF, ceftiofur; CN, gentamicin; E, erythromycin; ENR, enrofloxacin; MAR, marbofloxacin; N/A, not available; P, penicillin; RD, rifampicin; S, streptomycin; SXT, trimethoprim-sulfamethoxazole; TE, tetracycline.