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In vitro antibiotic sensitivity of strains of Ornithobacterium rhinotracheale isolated in the Netherlands between 1996 and 1999
  1. L. van Veen, DVM1,
  2. E. Hartman, PhD1 and
  3. T. Fabri, DVM1
  1. 1 Animal Health Service, Poultry Section, PO Box 9, 7400 AA Deventer, The Netherlands
  1. Willem Vleertmanstraat 2; 7578 EC Oldenzaal, The Netherlands


All the strains of Omithobacterium rhinotracheale isolated in the Netherlands between 1996 and 1999 were tested in the agar gel diffusion test for their sensitivity to amoxycillin, tetracycline, enrofloxacin and trimethoprim/sulphonamide (TMP/s). The percentages of strains sensitive to amoxycillin and tetracycline decreased in successive years from approximately 62 per cent to 14 per cent, and four strains were resistant to enrofloxacin or TMP/S. Twelve multiresistant strains were tested against seven alternative antibiotics; they were resistant to all of them except clavulanic acid-potentiated amoxycillin.

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