Study of Lipid in the Ear Canal in Canine Otitis Externa with Malassezia pachydermatis

Journal of Veterinary Medical Science

Akira MASUDA²  Tadashi MIYAMOTO²  Takeshi SUKEGAWA¹  Kazumi SASAI²  Hiroyuki TANI²  Eiichiroh BABA²  Naoe MIZUMOTO² 

[1] Masuda Dog & Cat Hospital,Hirakata,Osaka 573-1111,Japan;Veterinary Internal Medicine,Department of Veeterinary Medicine,Graduate School of Agriculture and Biological Sciences,Osaka Prefecture University,Sakai,Osaka 599-8531,Japan

关键词: canine;    fatty acid;    lipid;    Malassezia pachydermatis;    otitis externa;   

DOI  :  10.1292/jvms.62.1177

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(15)Cited-By(17)An epidemiological investigation of 120 canine otitis externa cases in 1, 370 dogs was done on the incidence rate, ear pinna shapes, breeds and their relationships.Eighty−five cases(12.6%)in 672 dogs with pendulous ears and 35 cases(5.0%)in 698 dogs with erect ears had otitis externa, and the difference between them was significant(P<0.05).Ninety−five auditory cerumen specimens were cultured for Malassezia pachydermatis(M.pachydermatis)and analyzed for concentrations of major fatty acids.Although rates of cases positive for M.pachydermatis in both ear pinna shapes were almost the same, i.e.55.2% in the pendulous group and 53.6% in the erect group, the average total fatty acid level of the pendulous ear group was significantly(P<0.05)higher than that in the erect ear group after dismissing extraordinary levels in the Siberian husky.Isolated M.pachydermatis strains were examined for the effects of fatty acid supplementation on their growth.The majority of the strains utilized fatty acids and grew faster in fatty acid supplemented broth.These results suggest that M.pachydermatis, the predominant causative agent of canine otitis externa, prefers the auditory canal of dogs with lipid−rich earwax and grows fast, but growth strongly depends upon the canine breed.

【 授权许可】

Unknown