The prevalence of ultrasonographic abnormalities and histopathologic lesions is high in testes of yearling tropical hair rams.

Autor: Dascanio J; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Roberson J; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Pfent C; College of Veterinary Medicine, Lincoln Memorial University, Harrogate, Tennessee., Nahar VK; Center for Animal and Human Health in Appalachia, College of Veterinary Medicine, Lincoln Memorial University, Harrogate, Tennessee., Arauz M; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Alexander K; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Roberts B; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Cope DA; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Bridger R; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies., Botsko D; Ross University School of Veterinary Medicine, Basseterre, St Kitts, West Indies.
Jazyk: angličtina
Zdroj: Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association [Vet Radiol Ultrasound] 2019 May; Vol. 60 (3), pp. 338-345. Date of Electronic Publication: 2019 Mar 11.
DOI: 10.1111/vru.12728
Abstrakt: Ultrasonography is commonly used to examine testes as part of a breeding soundness examination in sheep, especially, in cases of infertility or when gross testicular abnormalities are present. A descriptive, prospective, prevalence study was conducted to characterize the ultrasonographic, histopathologic, and spermatozoal morphology abnormalities present in a group of yearling tropic hair rams on the island of St. Kitts. Hyperechoic and shadowing abnormalities increased over a 6 month study period. Hyperechoic abnormalities were present in one or both testes in 89% (25/28) of yearling rams and 71% (40/56) of testes at castration. Shadowing abnormalities were present in one or both testes in 46% (13/28) of rams and 34% (19/56) of testes at castration. Shadowing was present more with moderate and severe hyperechoic abnormalities, with few testes in the mild category having any shadowing. As hyperechoic and shadowing abnormalities increased in severity, so did the severity of microscopic lesions including increased interstitial cellularity/fibrosis, interstitial mineralization, seminiferous tubules mineralization (hyperechoic only), and chronic lymphoplasmacytic orchitis. There were no spermatozoal morphologic abnormalities other than an increase in distal cytoplasmic droplets. The study findings detail a pathologic event in this group of yearling rams that has an unknown etiology. Potential causes may include scrotal insulation, trauma, infectious causes, immunity alterations, nutritional imbalances, and ingestion of a toxin. Further studies are required to elucidate the causative agent.
(© 2019 American College of Veterinary Radiology.)
Databáze: MEDLINE
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