Ear cytology veterinary chart

The choice of diagnostic technique will depend on the type of lesion that is presented. Where the lesion is superficial, such as an area of erythema, erosion, ulceration or primary lesions like papules or pustules, then acetate tape impression smears and direct and indirect smears are most useful. Where lesions are nodular then a fine needle aspirate is the diagnostic test of choice. Where the examination of otic cytology is needed samples of discharge can be taken from the ear using a swab.

Ear cytology is a test that can help clinicians diagnose and treat otitis externa. Use these images to review common findings present on ear cytology.

Otitis externa is one of the most common reasons dogs are presented to a vet. Cytologic evals of ear swabs are crucial for assessment of recurrent ear infections

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An assessment of the dog's ear condition prior to attempting to take a sample is important to try to gain an understanding of the severity of the otitis. While some infections such as with Malassezia spp. are highly pruritic and many dogs enjoy sample collection from their ears as it satisfies their need to scratch, in other cases for example where Gram-negative infection is present, the ear can be acutely painful.

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