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Aust Vet J. 2013 Jan-Feb;91(1-2):43-6. doi: 10.1111/avj.12007. Epub 2012 Dec 11.

Identification and antibiotic susceptibility of bacterial isolates from dogs with otitis externa in Australia.

Author information

  • 1MSD Animal Health, Bendigo, Victoria, Australia. darren.bugden@merck.com

Abstract

OBJECTIVE:

To identify and quantify the five most frequently isolated significant bacterial microorganisms, and their antibiotic susceptibility, from bacterial cultures of samples taken from the ears of dogs with otitis externa.

METHODS:

Bacterial culture and susceptibility testing data for ear swabs from dogs with presumed otitis externa were collated and evaluated.

RESULTS:

The five most frequently isolated microorganisms were: Pseudomonas aeruginosa, Staphylococcus pseudintermedius, Proteus sp., beta-haemolytic streptococci and Escherichia coli. Susceptibility to gentamicin was very high for most isolates, whereas for polymyxin B, high levels of resistance were seen. Beta-haemolytic streptococci had high levels of resistance to all of the antibiotics tested.

CONCLUSIONS:

This study provides veterinarians with Australian data to assist in cytological interpretation and initial empirical therapy of canine otitis externa.

© 2012 The Author. Australian Veterinary Journal © 2012 Australian Veterinary Association.

PMID:
23356371
[PubMed - indexed for MEDLINE]
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