|Otic exudate was obtained from 33 dogs with otitis externa for cytopathology and culture.
Two samples were taken from the same location in the external ear canal, for a total of 100 samples.
Thirty-six (36%) samples isolated only a single organism, of which 21 (21%) were Malassezia spp. Two organisms were present in 23 (23%) of the samples.
Cultures of the two samples agreed in 40 (80%) of the 50 pairs.
Cytopathology agreed with culture results only 68% of the time.
Cytopathology and culture may not be as definitive as previously assumed because of apparent variability of the microbial population within the external canal.
Source: Christine A. Graham-Mize, Edmund J. Rosser (2004): Comparison of Microbial Isolates and Susceptibility Patterns From the External Ear Canal of Dogs With Otitis Externa. In: Journal of the American Animal Hospital Association 40:102-108 (2004)
Tell a friend
Send this article