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Antimicrobial Susceptibility and rRNA Gene Restriction Patterns among Staphylococcus intermedins from Healthy Dogs and from Dogs Suffering from Pyoderma or Otitis Externa

Acta Veterinaria Scandinavica volume 36, pages 335–342 (1995)Cite this article

Abstract

A total of 60 Staphylococcus intermedins strains from dogs were investigated by their sensitivity to various antibiotics (50 strains) and by their rRNA gene restriction patterns (ribotyping) (60 strains). Fifteen isolates were from healthy dogs, 9 with otitis externa, and 36 with pyoderma, including 10 strains from a previous study. Sixty per cent of the 50 strains tested for antibiotic susceptibility demonstrated resistance to penicillin, 24% to spiramycin, 20% to tetracycline, 16% to chloramphenicol, and 2% to fucidic acid. All isolates were susceptible to amoxycillin with clavulanic acid, enrofloxacin, and sulphonamides with trimethoprim. There were no significant differences in antimicrobial susceptibility patterns observed among isolates from pyoderma, otitis externa or healthy dogs. Among the 60 strains studied by ribotyping, 10 different ribotypes were identified: 6 different ribotypes among isolates from otitis externa, 8 among isolates from pyoderma, and 5 among isolates from healthy dogs. One ribotype (profile C) was dominant among the isolates from healthy dogs while another ribotype (profile A) was dominant among strains from dogs suffering from pyoderma. This profile was not demonstrated in any of the strains from healthy dogs. From 5 different dogs suffering from pyoderma, 2 different clones were demonstrated based on their plasmid profile and antibiogram. In these dogs 1 of the clones always belonged to ribotype A. The results concerning strains of S. intermedins isolated from furunculosis suggest the existence of distinct subpopulations with different pathogenicity to dogs.

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Acknowledgments

The technical assistance of Miss Sussi Kristoffersen and the financial support of “Fondet til sygdoms-bekaempelse hos vore familiedyr” is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Veterinary Microbiology, The Royal Veterinary and Agricultural University, Frederiksberg, Denmark

    K. Pedersen

  2. Danish Veterinary Laboratory, Copenhagen, Denmark

    H. C. Wegener

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  1. K. Pedersen
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  2. H. C. Wegener
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Pedersen, K., Wegener, H.C. Antimicrobial Susceptibility and rRNA Gene Restriction Patterns among Staphylococcus intermedins from Healthy Dogs and from Dogs Suffering from Pyoderma or Otitis Externa. Acta Vet Scand 36, 335–342 (1995). https://doi.org/10.1186/BF03547679

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Acta Veterinaria Scandinavica

ISSN: 1751-0147