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Microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media.
J Am Vet Med Assoc. 1998 Feb 15; 212(4):534-8.JA

Abstract

OBJECTIVE

To compare microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media.

DESIGN

Prospective study.

ANIMALS

23 dogs with chronic bilateral otitis externa.

PROCEDURES

Swab specimens of the horizontal ear canal and middle ear were obtained for cytologic analysis, bacterial culture, and antimicrobial susceptibility testing. Integrity of the tympanic membrane was observed. If the tympanic membrane was intact, myringotomy was performed to collect specimens.

RESULTS

Otitis media was diagnosed in 38 of 46 (82.6%) ears evaluated. The tympanic membrane was intact in 71.1% of the ears with otitis media. The 3 most common organisms isolated from the horizontal ear canal and middle ear were Staphylococcus intermedius, yeast, and Pseudomonas spp. A difference in total isolates or susceptibility patterns between the horizontal ear canal and middle ear was found in 34 (89.5%) ears. Compared with results of bacterial culture, cytologic examination of swab specimens was not as effective for detection of rods and cocci from the middle ear.

CLINICAL IMPLICATIONS

In dogs with chronic otitis externa, otitis media often exists even when there is an intact tympanic membrane. In our study, the same isolates were rarely found in the horizontal ear canal and middle ear. Therefore, to choose appropriate antimicrobial agents, in addition to cytologic examination, bacterial culture and susceptibility testing of swab specimens from the horizontal ear canal and middle ear should be performed.

Authors+Show Affiliations

Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus 43210, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9491161

Citation

Cole, L K., et al. "Microbial Flora and Antimicrobial Susceptibility Patterns of Isolated Pathogens From the Horizontal Ear Canal and Middle Ear in Dogs With Otitis Media." Journal of the American Veterinary Medical Association, vol. 212, no. 4, 1998, pp. 534-8.
Cole LK, Kwochka KW, Kowalski JJ, et al. Microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media. J Am Vet Med Assoc. 1998;212(4):534-8.
Cole, L. K., Kwochka, K. W., Kowalski, J. J., & Hillier, A. (1998). Microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media. Journal of the American Veterinary Medical Association, 212(4), 534-8.
Cole LK, et al. Microbial Flora and Antimicrobial Susceptibility Patterns of Isolated Pathogens From the Horizontal Ear Canal and Middle Ear in Dogs With Otitis Media. J Am Vet Med Assoc. 1998 Feb 15;212(4):534-8. PubMed PMID: 9491161.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media. AU - Cole,L K, AU - Kwochka,K W, AU - Kowalski,J J, AU - Hillier,A, PY - 1998/3/10/pubmed PY - 1998/3/10/medline PY - 1998/3/10/entrez SP - 534 EP - 8 JF - Journal of the American Veterinary Medical Association JO - J. Am. Vet. Med. Assoc. VL - 212 IS - 4 N2 - OBJECTIVE: To compare microbial flora and antimicrobial susceptibility patterns of isolated pathogens from the horizontal ear canal and middle ear in dogs with otitis media. DESIGN: Prospective study. ANIMALS: 23 dogs with chronic bilateral otitis externa. PROCEDURES: Swab specimens of the horizontal ear canal and middle ear were obtained for cytologic analysis, bacterial culture, and antimicrobial susceptibility testing. Integrity of the tympanic membrane was observed. If the tympanic membrane was intact, myringotomy was performed to collect specimens. RESULTS: Otitis media was diagnosed in 38 of 46 (82.6%) ears evaluated. The tympanic membrane was intact in 71.1% of the ears with otitis media. The 3 most common organisms isolated from the horizontal ear canal and middle ear were Staphylococcus intermedius, yeast, and Pseudomonas spp. A difference in total isolates or susceptibility patterns between the horizontal ear canal and middle ear was found in 34 (89.5%) ears. Compared with results of bacterial culture, cytologic examination of swab specimens was not as effective for detection of rods and cocci from the middle ear. CLINICAL IMPLICATIONS: In dogs with chronic otitis externa, otitis media often exists even when there is an intact tympanic membrane. In our study, the same isolates were rarely found in the horizontal ear canal and middle ear. Therefore, to choose appropriate antimicrobial agents, in addition to cytologic examination, bacterial culture and susceptibility testing of swab specimens from the horizontal ear canal and middle ear should be performed. SN - 0003-1488 UR - https://www.unboundmedicine.com/medline/citation/9491161/Microbial_flora_and_antimicrobial_susceptibility_patterns_of_isolated_pathogens_from_the_horizontal_ear_canal_and_middle_ear_in_dogs_with_otitis_media_ DB - PRIME DP - Unbound Medicine ER -