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Necrotizing external otitis (malignant otitis externa) is an uncommon form of external otitis that occurs mainly in elderly diabetics, being somewhat more likely and more severe when the diabetes is poorly controlled. Even less commonly, it can develop due to a severely compromised immune system.
The most common aetiology of acute otitis externa is bacterial infection, [5] while chronic cases are often associated with underlying skin diseases such as eczema or psoriasis. [6] A third form, malignant otitis externa, or necrotising otitis externa, is a potentially life-threatening, invasive infection of the external auditory canal and ...
Severe otitis externa in a Cocker Spaniel. Signs of ear infection include shaking of the head, and scratching at or under the ear. Some animals may also paw the ear or try to rub it on other objects to relieve pain and discomfort. Ear infections often result in a darker red ear, dirt in the ear, or a general inflamed appearance.
Malignant otitis externa is a rare and potentially life-threatening complication of otitis externa in which the infection spreads from the ear canal into the surrounding skull base, hence becoming an osteomyelitis. [16] It occurs largely in diabetic patients. [20]
Neomycin/polymyxin B/hydrocortisone, sold under the brand Otosporin among others, is a medication used to treat otitis externa (swimmer's ear) and certain eye disorders. [2] [3] It consists of the antibiotics neomycin and polymyxin B, and the steroid hydrocortisone. [3] It is used as an ear drop or eye drop. [2] [3]
It is a type of otitis externa. [2] Without treatment it can lead to narrowing of the ear canal. [1] A number of treatment options exist including putting vinegar in the ear, using antibiotic drops, and surgery. [1]
Otomycosis does not usually cause as much canal skin edema as does acute bacterial external otitis.While a severe pressure type of pain is a prominent feature of advanced cases, the ear is usually much less tender, if at all, to traction or tragal pressure.
Poulter, Melinda D., and Claudia J. Hinnebusch. "Turicella otitidis in a young adult with otitis externa." Infectious Diseases in Clinical Practice 13.1 (2005): 31–32. Gomez-Garces JL, Alhambra A, Alos JI, Barrera B, García G (2004). "Acute and chronic otitis media and Turicella otitidis: a controversial association". Clin Microbiol Infect.