Ear cytology for the veterinary nurse
Abstract
Ear cytology is one of the most important investigative steps in all cases of otitis externa and lends itself well to input from the veterinary nurse. Stained and unstained samples are useful to assess the ear for the presence respectively of bacterial and yeast pathogens and ectoparasites. Sample collection can be easily achieved in the conscious dog and only a minimal amount of equipment is needed to take and interpret good samples.
Gold standard otitis externa management includes the use of ear cytology prior to selection of ear cleaners and drops. Veterinary nurses can be utilised in practice for taking samples and examining them on slides. While nurses are not able to diagnose, they can identify the presence of bacterial and yeast pathogens. Cytology is also useful for assessing the end point in therapy to ensure that the infection has resolved.
While the colour, appearance and odour of an otic discharge can give strong clues as to the presence of and type of infection, visual inspection of the ear cannot replace cytological examination. It is impossible to decide on the need for further diagnostic tests or select appropriate therapy without undertaking cytology of the ear discharge. A cytology sample can be taken, processed and interpreted by any competent veterinary nurse. The results of cytology can then help in the selection of appropriate therapy by the attending veterinary surgeon.
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