Table of Contents Author Guidelines Submit a Manuscript
Case Reports in Veterinary Medicine
Volume 2012, Article ID 989687, 5 pages
Case Report

Clinical, Bacteriological, and Histopathological Findings of a Testicular Fibrosis in a 6-Year-Old Lusitano Stallion

1Department of Immuno-Physiology and Farmacology (AR), Department of Veterinary Clinics (TG) and Department of Pathology and Molecular Immunology (FF, IA and FG) of the Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Campus Agrário de Vairão, Rua Jorge Viterbo Ferreira no. 228, 4050-313 Porto, Portugal
2Center for the Study of Animal Sciences (CECA), ICETA, University of Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas 7, 4485-661 Vairão, Portugal
3LusoPecus, Rua da Fábrica-Azinhaga do Catalão, Loja 2-A-Porto Alto, 2135-000 Samora Correia, Portugal
4EVP Lda, Rua Luís Derouet 27, Esquerdo 1, 1250-151 Lisbon, Portugal
5Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal

Received 28 June 2012; Accepted 27 August 2012

Academic Editors: G. Sironi and D. M. Wong

Copyright © 2012 A. Rocha et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A 6-year-old Lusitano stallion was referred to our centre due to an enlarged left testicle. Anamnesis indicated that the stallion had a chronic hypertrophy of the left testicle, with no apparent ill effect on work (dressage training) or semen production. Prolonged use of anti-inflammatory drugs (NSAIDs) and antibiotics were probable. Upon examination of the animal, it was found that clinical signs were compatible with chronic testicular degeneration or fibrosis. Ultrasound scanning did not evidence the exuberant macroscopic lesions seen upon hemicastration of the left testicle, but it showed in the left spermatic cord a conspicuous absence of the typical hypoechogenic areas representing the pampiniform plexus. Swabbing of the penis, prepuce, and distal urethra resulted in the isolation of Rhodococcus equi and Corynebacterium spp. However, histopathological examination did not support infectious orchitis as cause of the lesions and no bacterial growth was obtained from swabbing of the parenchyma in the excised testicle. Histopathological findings were compatible with chronic orchitis with fibrosis and necrosis, probably secondary to ischemia of the testicular parenchyma. After hemi-castration, the stallion resumed semen production at acceptable levels.