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Predisposing factors contributing to otitis externa include excessive local moisture and increased pH, trauma, obstruction of the ear canal, primary otitis media, systemic diseases, and treatment effects ( Jacobson, 2002 Moriello, 2013).
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Secondary causes of otitis externa affect abnormal ear and include bacteria, fungi, medication reactions, over-cleaning, and yeast overgrowth ( Crespo et al., 2000 Jacobson, 2002 Hariharan et al., 2006 Shokri et al., 2010 Kennis, 2013 Moriello, 2013 Kittl et al., 2018).
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These primary causes are usually unnoticed clinically, but they alter the ear environment and, therefore, facilitate secondary infections. Primary causes of otitis externa affect normal ear and include foreign bodies, parasites, fungi (e.g., Aspergillus, Sporothrix, and Stephanoascus), allergy, autoimmune and immune-mediated diseases, endocrine and glandular disorders, viruses, and miscellaneous ( Dion and Speckmann, 1978 Jacobson, 2002 Shokri et al., 2010 Kennis, 2013 Moriello, 2013 dos Reis Gomes et al., 2014 Mascarenhas et al., 2019). Collectively, these causes and factors are referred to as the primary secondary predisposing perpetuating (PSPP) classification system ( Jacobson, 2002 Moriello, 2013). This dermatological disorder may be acute or chronic ( Moriello, 2013).Ĭauses of otitis externa could be primary or secondary, with a variety of predisposing and perpetuating factors that contribute to/or promote the disease. Otitis externa is the inflammation of the external ear canal, outside of the tympanic membrane, and sometimes the pinna ( Rosser et al., 2004 Kennis, 2013 Bollez et al., 2018). Through these strategies, Pew aims to help policymakers enact data-driven reforms that deliver lasting results.Feline otitis is etiologically a complex disease, which can be clinically challenging ( Shokri et al., 2010 Kennis, 2013).
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But decades of research have revealed a range of strategies that are more effective for achieving public safety. Crime and correctional control-any court-ordered supervision of an individual, whether in the community, as with probation or parole, or in a facility, such as a jail or prison-create substantial burdens for governments and taxpayers, as well as for people in confinement or under supervision and their families.
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