Unilateral Otitis Externa Research Articles

OTITIS EXTERNA UNILATERAL IN CROSS BREED SHIH TZU DOG

Otitis externa is an inflammatory disease of the outer ear canal. Otitis externa can be caused by several factors such as bacteria, fungi, foreign bodies, parasitic infestations, immune diseases and atopic dermatitis. The purpose of writing this case report is to review Otitis Externa in dogs and the appropriate handling and treatment measures. A Shih Tzu crossbreed dog with cream colored hair aged 5 years and weighing 10.8 kg was examined with complaints of a runny and smelly right ear accompanied by itching and the dog stroked its head. On clinical examination, it was shown that the right ear of the case dog secreted cerumen fluid and had a pungent odor. The ear mucosa also looks reddish and slightly swollen. The results of ear swab examination on the case dog showed Otodectes cynotis mite infestation and the results of cytology examination found rod-shaped bacteria. The diagnosis in animal cases was unilateral otitis externa with a fausta prognosis. Treatment of otitis externa in case dogs is given drops of a combination of Polymyxin B Sulphate, Neomycin Sulphate, Fludrocortisone Acetate, and Lidocaine HCl (Otilon®) by administering 3 drops, 2 times a day in the right ear for 14 day. Evaluation of case dogs after being given treatment for 14 days showed a good response, where the dog had stopped scratching its ears, there was no redness and no Otodectes cynotis mites were found. Case animal owners are advised to diligently clean their dog's ears and try to keep them dry. And also cut the animal's hair that is on the inside of the ear. Pet owners are also advised to diligently clean their dog's ears and try to keep them dry. And also cut the hair of animal cases that are on the inside of the ear to reduce the possibility of otitis not recurring.

Evaluation of Video-Otoscopic, Radiographic and Computed Tomographic Examinations of Cats and Dogs with Ear Diseases

Abstract The aim of this study was to evaluate the effectiveness of imaging techniques (video-otoscopy-VO, radiography-RTG, computed tomography-CT) in diagnosing ear diseases in cats and dogs. Seven cats and thirteen dogs diagnosed with ear diseases were used for the research. Clinical examination, VO, RTG and CT were performed. Three (42.9%) unilateral otitis externa (OE), three (42.9%) unilateral otitis media (OM), and one (14.2%) bilateral otitis media (OM) with OE were diagnosed in 7 cats. Five (38.4%) unilateral OE, one (7.7%) unilateral OM, four (30.8%) bilateral OE, and three (23.1%) bilateral OM with OE were diagnosed in 13 dogs. All diagnostic methods were determined to be highly efficient for the specified diagnosis. VO and RTG were confirmed as sufficiently effective for the diagnosis of OE. OE plays a major role in the etiopathogenesis of OM, and for this reason, RTG and CT are required diagnostic methods for this condition.

Unilateral otitis externa induced by a plastic foreign body

A nine-year-old, male, neutered Tibetan terrier was evaluated for unilateral otitis externa associated with the history of a dog bite injury to the pinna five years prior. Examination findings of...

Zymbal Gland (Auditory Sebaceous Gland) Carcinoma Presenting as Otitis Externa in a Pet Rat (Rattus norvegicus)

A 1-year-old sexually intact male fancy rat (Rattus norvegicus) was presented for unilateral purulent otitis externa and weight loss. A small amount of bloody discharge was noted at the ostium of the left ear canal. The canal and the surrounding tissue were firm to the touch. Mild left-sided enophthalmos and facial nerve paralysis were noted. Otoscopic examination demonstrated caseous debris, and a swab of the external ear canal demonstrated a mixed population of rods and cocci on cytological evaluation. Bacterial culture of the external ear canal grew Escherichia coli. The rat was initially placed on oral and topical antimicrobial therapy. Despite treatment, the condition of the affected ear deteriorated and the rat continued to lose weight. Other clinical signs observed at this time included a worsening of the facial nerve paralysis, head tilt, and circling. A biopsy sample of the swollen tissue surrounding the left ear canal was collected; however, the rat died the day following the biopsy procedure. Histopathology of the biopsied tissue revealed an invasive neoplasm consistent with a Zymbal gland (auditory sebaceous gland) carcinoma. Zymbal glands are modified sebaceous glands surrounding the ear canal of rodents. Although chemically induced neoplasia of these glands is frequently observed, spontaneous tumor formation is much less common. Tumors of the Zymbal gland should be considered as underlying causes for unilateral otitis externa in rats.

Aspergillus otitis in small animals--a retrospective study of 17 cases.

Aspergillus spp. are saprophytic opportunistic fungal organisms and are a common cause of otomycosis in humans. Although there have been case reports of Aspergillus otitis externa in dogs, to the best of the authors' knowledge, this is the first retrospective case series describing Aspergillus otitis in dogs and cats. To characterize signalment, putative risk factors, treatments and outcomes of a case series of dogs and cats with Aspergillus otitis. Eight dogs and nine cats diagnosed with Aspergillus otitis. A retrospective review of medical records from 1989 to 2014 identified animals diagnosed with Aspergillus otitis based on culture. All dogs weighed greater than 23kg. The most common putative risk factors identified in this study were concurrent diseases, therapy causing immunosuppression or a history of an otic foreign body. Aspergillus otitis was unilateral in all study dogs and most cats. Concurrent otitis media was confirmed in three dogs and one cat, and suspected in two additional cats. Aspergillus fumigatus was the most common isolate overall and was the dominant isolate in cats. Aspergillus niger and A.terreus were more commonly isolated from dogs. Animals received various topical and systemic antifungal medications; however, otic lavage under anaesthesia and/or surgical intervention increased the likelihood of resolution of the fungal infection. Aspergillus otitis is uncommon, typically seen as unilateral otitis externa in cats and larger breed dogs with possible risk factors that include immunosuppression and otic foreign bodies; previous antibiotic usage was common.

Comparative analysis between Pseudomonas aeruginosa genotypes and severity of symptoms in patients with unilateral or bilateral otitis externa.

Random amplified polymorphic DNA (RAPD) analysis was done on 32 isolates of Pseudomonas aeruginosa. These isolates were obtained from 22 patients who presented to the emergency room in a major medical center in Beirut, Lebanon, during a 5-month period with the diagnosis of either unilateral or bilateral otitis externa. Patients had yellowish to greenish discharge, moderate to severe external auditory canal swelling, moderate to severe pain, and periauricular cellulitis. None of these patients had intrinsic predisposing factors. An ear swab was obtained from both ears of patients, cultured on trypticase soy agar. P. aeruginosa was identified on the basis of pyocyanine production and API identification kits. RAPD analysis was done by using two primers (10 mer and 21 mer primers) and appropriate PCR conditions on extracted DNA. Our data have shown 23 RAPD patterns (A-W) distributed among the 32 P. aeruginosa isolates. RAPD patterns were reproducible. Twenty of 32 isolates were recovered from 10 patients with bilateral otitis externa. The remaining 12 of 32 isolates were recovered from 12 different patients with unilateral otitis externa. Eleven RAPD patterns (A,B,C,D,E,F,H,I,R,U,V) were associated with severe clinical symptoms, including severe pain, severe external auditory canal swelling, periauricular cellulitis, and a yellowish discharge. The remaining RAPD patterns were not associated with severe infections. This denotes a possible association between certain genotypes and severity of symptoms.