Otitis Externa: An Essential Guide to Diagnosis and Treatment, 1st Edition (Hardback) book cover

Otitis Externa

An Essential Guide to Diagnosis and Treatment, 1st Edition

By Richard G. Harvey, BVSc DVD Dip ECVD FSB, Sue Paterson

CRC Press

168 pages

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pub: 2014-05-27
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The investigation and management of ear disease occupies a significant portion of a veterinary clinician’s time. Otitis externa, in particular, is likely to be seen by a busy small animal clinician at least once a day. Otitis Externa: An Essential Guide to Diagnosis and Treatment provides a comprehensive source of information on the relevant structure, function, medical treatment, and surgery of the ear, from Otodectes cynotis to Pseudomonas aeruginosa. The book details the salient points of diagnosis and treatment and includes more than 200 colour illustrations.

Topics include:

  • The anatomic relationship of the components of the external, middle, and inner ear and normal ear function
  • Diagnosis of otitis externa, including history, examination, biopsy, and imagin
  • The aetiology and pathogenesis of otitis externa
  • Proper ear cleaning and assessing the integrity of the tympanum, the discharge, and the canal
  • Medical management of ear disease and primary and secondary causes
  • Clinical signs, diagnosis, and management of otitis media
  • Ototoxicity and other side effects of otic medication
  • Aural ablation and bulla osteotomy

Chronic, and chronic recurrent, otitis externa is frustrating and costly to the owner and often painful for the animal. Concise and user-friendly, this text helps clinicians identify signs of this condition, make an appropriate diagnosis, and plan the best treatment options.


"As ear disease is so frequently a cause of suffering in our pets and also a cause of great frustration for both clients and vets, this book should be in every practice library. Its compact size means it will hopefully be regularly used in the consulting room and the lab."

—D. G. Bentley in Veterinary Record

"All topics are dealt with comprehensively and should help the clinician a great deal in dealing appropriately with all aspects of otitis externa… All in all, a nice addition to a practitioner’s library!"

Inge Geens, DVM, CertSAD, MRCVS, Veterinary Surgeon, Laurels Veterinary Centre, UK

"Overall, this is a good reference to have on your shelf."

—Sandra R. Merchant, DVM, DACVD, Louisiana State University, in Vet Med Today

Table of Contents

The Normal Ear



External auditory meatus

Middle ear

Microscopic structure of the external ear canal

Microclimate of the external ear canal

Cerumen in normal and otitic ears

Approach to the Diagnosis of Otitis Externa




Physical examination

Otic examination

Otoscopic appearance of the external ear canal and tympanum

Cytological characteristics of normal and abnormal ears



Aetiology and Pathogenesis of Otitis Externa

Concept of primary and secondary factors, predisposing factors, and perpetuating change

Primary causes of otitis externa

Secondary causes of otitis externa

Perpetuating factors

Ear Cleaning


Assessing the integrity of the tympanum

Assessing the discharge

Assessing the canal

Cleaning process

Home cleaning

Medical Management of Ear Disease

Dealing with primary triggers

Dealing with secondary causes

Chronic or recurrent otitis externa in dogs

Otitis Media


Clinical signs

Major differential diagnoses



Treatment of nasopharyngeal polyps in cats


Ototoxicity and Other Side-Effects of Otic Medication


Meatal and tympanic inflammation

Effects within the middle ear


Systemic effects of otic medication

Ototoxicity of systemic drugs


Aural Ablation and Bulla Osteotomy


Presurgical investigations

Vertical canal ablation

Bulla osteotomy

Special problems relating to surgery of the middle ear in cats



About the Authors

Richard G. Harvey, BVSc DVD, Dip.ECVD, FSB, PhD, MRCVS

The Veterinary Centre, Cheylesmore, Coventry, UK

Sue Paterson, MA, VetMB, DVD, DipECVD, MRCVS, RCVS and European Specialist in Veterinary Dermatology

Rutland House Referral Hospital, St Helens, Merseyside, UK

Subject Categories

BISAC Subject Codes/Headings:
MEDICAL / Veterinary Medicine / General
MEDICAL / Veterinary Medicine / Food Animal