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Papers |
1 Small Animal Medicine Clinic, Veterinary Faculty, Ludwig Maximilian
University, 80539 Munich, Germany
2 Clinic for Ruminants, Veterinary Faculty, Ludwig Maximilian University, 80539
Munich, Germany
Correspondence: Correspondence to Professor Mueller, e-mail: ralf.mueller{at}med.vetmed.uni-muenchen.de
Eighty-three dogs with clinical signs of otitis externa and with ear
cytology revealing microbial organisms were studied. Samples were collected
from both ears of each dog by inserting two swabs successively into each ear
canal, rotating each once through 360° and then rolling it out in a line
on to a glass slide. For each animal, four single parallel smears (SPS) were
made on one slide, which was then appropriately labelled to identify the
animal as well as the order of the samples. The slides, one representing each
animal, were subsequently stained with modified Wright's stain. Six high-power
fields of every SPS were counted. Golden retrievers and West Highland white
terriers were found to be predisposed to developing otitis externa (P=0.0006
and P=0.0123, respectively). Otitis externa occurred significantly more
frequently in dogs with pendulous pinnae than in dogs with erect pinnae
(P=0.0009). There was no significant difference between the first and the
second samples with respect to the number of microorganisms found (P>0.1
for cocci and P>0.5 for rods and yeasts), and there was a substantial
agreement between the results of the two successive swabs for the presence of
cocci (
=0.765) and rods (=0.705). For yeasts, the agreement was
only moderate (=0.581).
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