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Table 3 Antimicrobial resistance of the 21 sequenced Iranian G. anatis isolates

From: Clonal spread of multi-resistant Gallibacterium anatis isolates among Iranian broilers and layers

Antimicrobial Concentration (μg/mL) No. of isolates (%)
Susceptible Intermediate Resistant
Amikacin 4–32 95.2 0.0 4.8
Amoxicillin/clavulanic acid 0.25/0.12 to 8/4 66 34 0.0
Cefazolin 1–32 23.8 71.4 4.7
Ceftazidime 4–16 80.9 9.5 9.5
Chloramphenicol 2–32 95.2 4.8 0.0
Doxycycline 0.25–8 81 14.3 4.7
Enrofloxacin 0.125–4 0.0 9.5 90.5
Gentamicin 0.25–8 76.2 9.5 14.3
Imipenem 1–8 76.2 9.5 14.3
Tetracyclinea 4–16 23.8 0.0 76.2
Trimethoprim/sulfamethoxazole 0.5/9.5–4/76 90.5 0.0 9.5
  1. aOut of the 21 strains tested, the identical outcomes were confirmed in phenotypic-genotypic evaluation of resistance to tetracycline.