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Pityrosporum pachydermatis “canis” as a Major Cause of Otitis externa in Dogs

2009; Wiley; Volume: 22; Issue: 6 Linguagem: Inglês

10.1111/j.1439-0507.1979.tb01741.x

1439-0507

M. Abou‐Gabal, C. B. Chastain, R. M. Hogle,

Autoimmune Bullous Skin Diseases

MycosesVolume 22, Issue 6 p. 192-199 Pityrosporum pachydermatis "canis" as a Major Cause of Otitis externa in Dogs M. Abou-Gabal, Corresponding Author M. Abou-Gabal Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Microbiology and Preventive MedicineDepartment of Veterinary Microbiology & Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa 50011, USA.Search for more papers by this authorC. B. Chastain, C. B. Chastain Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Clinical SciencesSearch for more papers by this authorR. M. Hogle, R. M. Hogle Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Microbiology and Preventive MedicineSearch for more papers by this author M. Abou-Gabal, Corresponding Author M. Abou-Gabal Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Microbiology and Preventive MedicineDepartment of Veterinary Microbiology & Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, Iowa 50011, USA.Search for more papers by this authorC. B. Chastain, C. B. Chastain Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Clinical SciencesSearch for more papers by this authorR. M. Hogle, R. M. Hogle Departments of Veterinary Microbiology and Preventive Medicine and Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University (Prof, and Head: Dr. R. A. Packer), Ames, Iowa, USA Department of Veterinary Microbiology and Preventive MedicineSearch for more papers by this author First published: June 1979 https://doi.org/10.1111/j.1439-0507.1979.tb01741.xCitations: 29 AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Summary: Twenty-five dogs of different breeds having otitis externa of one or both ears as well as 10 dogs with clinically apparent healthy ears were examined ideologically. The yeast, Pityrosporum pachydermatis "canis" was isolated from 18 cases (72%). In 16 cases, the organism constituted the sole isolate (64%) and in the other two cases, its growth predominated the associated organism. Its isolation from the control ears was limited to 4 cases (40 %) with a noticeable weak growth population. The predominating existence of Pit. pachydermatis "canis" in association with the infected ears seems to emphasize a significant role of such an organism in the establishment of otitis externa in dogs. The isolated strains of Pit. pachydermatis "canis" showed in vitro sensitivity to nystatin. Using the plate serial dilution method, the drug exerted a fungicial effect against all of the isolated strains at a concentration of 20 μg/ml medium (1: 50,000) a lesser concentration of 10 μg/ml medium (1:100,000) proved to act fungicidal on most the tested strains. Under the condition of the concentration-time exposure procedure, nystatin exhibited a fungicidal activity against all strains at a concentration of 10μg/ml in 96 hours. All of the infected cases were cured using panalog. Zusammenfassung: 25 Hunde verschiedener Arten mit Otitis externa eines oder beider Ohren sowie 10 Hunde mit klinisch anscheinend gesunden Ohren als Kon-trolle wurden mykologisch untersucht. Die Hefe Pityrosporum pachydermatis "canis" wurde bei 18 Fällen (72%) isoliert. Bei 16 Fällen (64%) machte sie die ein-zigen Isolate aus und in weiteren 2 Fällen überwog das Wachstum dieser Hefe vor dem der begleitenden Organismen. Bei den Kontrollfällen wurde Pityrosporum pachydermatis "canis" viermal (40%) nachgewiesen. Das vorherrschende Auftreten von Pityrosporum pachydermatis "canis" in Ver-bindung mit der Gehörgangsinfektion scheint die Rolle derartiger Organismen fiir die Entstehung von Otitis externa bei Hunden zu betonen. ie isolierten Stämme von Pityrosporum pachydermatis "canis" zeigten in vitro Empfindlichkeit gegenüber Nystatin. Bei Verwendung der Plattenreihenverdünnungsmethode übte das Mittel gegen alle getesteten Stämme bei einer Konzentration von 20 μg/ml Nährboden (1:50 000) eine pilzabtötende Wirkung aus. Eine geringere Konzentration von 10 μg/ml Nährboden (1:100 000) übte immer nodi eine fungi-zide Wirkung auf die meisten der getesteten Stamme aus. Unter den Bedingungen der Zeit-Konzentrations-Exposition-Methode wirkte Nystatin gegen alle geprüften Stämme pilzabtötend bei einer Konzentration von 10μg/ml in 96 Stunden. Alle erkrankten Fälle wurden durch Behandlung mit Panalog ausgeheilt Citing Literature Volume22, Issue6June 1979Pages 192-199 RelatedInformation