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Subject: Veterinary Surgery and Radiology × Author: JAGAN MOHAN REDDY, K × End date: 2009 × Start date: 2000 ×
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    ThesisItemOpen Access
    CLINICAL EVALUATION OF ZEPP’S AURAL RESECTION AND VERTICAL EAR CANAL ABLATION IN THE TREATMENT OF CHRONIC OTITIS EXTERNA IN DOGS
    (SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA, 2003-07) JAGAN MOHAN REDDY, K; Chandrasekhar, E.L(Major); Raghavender, K.B.P.; Anjaneyulu, Y
    ABSTRACT : The present clinical study was carried out on 88 dogs presented for treatment of chronic otitis externa. In 74 dogs (84.09%) medical treatment was performed and in the remaining 14 dogs surgical treatment was undertaken. Out of these 14 dogs, 7 dogs were treated by performing Zepp‟s aural resection and the remaining 7 dogs were treated by performing vertical ear canal ablation. The mean age of presentation of dogs with otitis externa requiring medical treatment was found to be 5.21 ± 0.27 years. For surgical cases the mean age were found to be 7.07 ± 0.23 years. The results revealed that a majority of cases of chronic otitis externa were noticed in German Shepherd followed by Spitz, Mongrels, Labrador, Doberman and Dachshund. The various clinical signs of otitis externa were head shaking, scratching, pain odour, ear discharges and head tilt. Visual examination of ear canal revealed hyperplasia, thickening, ulceration, stenosis and calcification of ear canals in 14 cases. These cases were selected for surgical treatment. Out of 88 dogs examined 27 dogs had unilateral ear disease and 61 dogs had bilateral ear disease. The results of cultural examination of the ear discharges resulted in isolation of Staphylococcus sp., in 51 cases, Pseudomonas in 24 cases and E. coli in 13 cases. Ciprofloxacin was found to be the most effective drug with 31 cases responding to the drug, followed by Gentamycin in 25 cases, Chloramphenicol in 22 cases, Amoxycillin in 6 cases and Oxytetracycline in 4 cases. Medical treatment comprised of through irrigation of the external ear canal followed by topical and parenteral antibiotics as determined by antibiotic sensitivity test. Medical treatment of 74 dogs resulted in alleviation of symptoms in 62 (83.78%) dogs while six dogs had relapse of symptoms after 4-6 weeks. Treatment of these six dogs with the same treatment regimen led to recovery. Six dogs were not available for follow up. All the seven dogs where Zepp‟s aural resection was performed recovered uneventfully. Wound dehiscence was observed in one case. All the dogs recovered without any post-operative complications. All the seven dogs that had advanced chronic otitis externa with symptoms like hyperplasia and complete or partial stenosis of the ear canal were relieved from the clinical symptoms of otitis externa by performing vertical ear canal ablation. Barring one case of wound dehiscence, no complications were observed in any of the dogs. Histopathological examination of the resected portions of the ear canal revealed the presence of severe cellular infiltration, congestion, extensive fibroblastic proliferation, and attempts of ossification.