Clinical management and case review of a presumptive novel clinical presentation of protothecosis in donkeys causing ulcerated nodular lesions in the ear pinnae of 18 animals

Author:

Kay Gigi1ORCID,Knottenbelt Derek2ORCID,Millins Caroline3,Tligui Noursaid4,Azelhak Rabia15

Affiliation:

1. World Veterinary Service 4 Castle Street Cranborne Dorset BH21 5PZ United Kingdom

2. Equine Medical Solutions Ltd. Stirling Scotland UK

3. Department of Livestock and One Health, Institute of Infection, Veterinary and Ecological Sciences University of Liverpool Brownlow Hill Liverpool L69 7ZX United Kingdom

4. Institut Agronomique et Veterinaire Hassan II Rabat Morocco

5. Dick Vet Equine Hospital Edinburgh UK

Abstract

AbstractThis is a retrospective case series that describes a novel syndrome seen in 18 donkeys in Morocco that presented to this author,'s clinic with ulcerated nodular lesions of the ear pinnae. In the majority of cases, the lesions are confined to the ears, they are always bilateral and can occasionally progress to other areas of the body. Macroscopically, the lesions in all 18 donkeys are very uniform in presentation, even if the size of the nodules varies. This case series reviews the presentation, investigation, treatment and outcome for 18 cases presented to these authors’ clinics from 2011 to 2021. Skin biopsies from a subset of eight cases showed similar changes in chronic pyogranulomatous, dermatitis with myriad intra‐ and extra‐histiocytic organisms, the morphology of which is most consistent with that of Prototheca spp. infection. This is a novel presentation that represents a significant welfare issue for donkeys, as well as having important economic consequences for owners in the developing world.

Publisher

Wiley

Reference19 articles.

1. IzadiSS KatiraeeF AshrafihelanJ ZabihiM Toloei SaeedM MovahedR.The first report of equine cutaneous protothecosis. In:European Veterinary Conference Voorjaarsdagen.2013. p.13.

2. Cutaneous cryptococcosis in a donkey

3. A new staining solution for the morphological studies of fungi and Prototheca;Pal M;Nippon Ishinkin Gakkai Zasshi,1990

4. Histopathologic Diagnosis of Fungal Infections in the 21st Century

5. Successful treatment of cutaneous protothecosis with liposomal amphotericin and oral itraconazole

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