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Year 2011 - Volume 31, Number 11
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The role of ear mites of the genus Raillietia (Acari: Raillietiidae) in otitis of domestic ruminants, 31(11):981-984
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ABSTRACT.- Ferry F.R.A., Faccini J.L.H. & Inada T. 2011. The role of ear mites of the genus Raillietia (Acari: Raillietiidae) in otitis of domestic ruminants. Pesquisa Veterinária Brasileira 31(11):981-984. Departamento de Medicina Geral, Universidade Federal do Estado do Rio de Janeiro, EMC/CCBS, Hospital Universitário Gaffrée e Guinle, Rua Mariz e Barros 775, Tijuca, Rio de Janeiro, RJ 20270-004, Brazil. E-mail: fernandoferry@hotmail.com
This paper presents a hypothesis on the involvement of species of the genus Raillietia Trouessart in the pathology of parasitic otitis in domestic ruminants. The chelicerae and claws of the tarsi are structures that contribute significantly towards producing primary lesions. The movable digits of the chelicerae accidentally injure the epithelium that lines the ear canal, while the claws of the tarsi perforate the epithelium, allowing the mites to affix themselves while feeding. The lesions in the epithelium caused by the chelicerae and the claws favor multiplication of the bacteria that inhabit the ear canal, resulting in typical cases of otitis. |
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