Veterinary Andrology and Reproductive Techniques

VASCULAR DISTURBANCES

• Interference with the circulation and infarction of the testis can be produced by manual torsion of the testis or by the emasculatome used for castration of lambs or calves.
• Congestion and pain of the scrotal testis due to naturally- occurring torsion or contusion has been reported in racing stallions. The testes would be swollen, congested and painful for the next 3 to 4 days.
• Dogs with inguinal or abdominal cryptorchid testes may occasionally develop torsion of the testis with a sudden onset of pain and associated symptoms.
• Hemorrhagic infarction of the testis may follow torsion.
• Tumors of the abdominal testes may also predispose to torsion.

Testicular biopsies, particularly in bulls, often result in focal areas of testicular necrosis because of vessel damage when a desirable size of testicular material is obtained

• Effect of faulty testicular biopsy which is leading to tesicular degeration is shown in picture
• Inflammation of the testicular artery in the horse may be caused by Strongyle larvae, the equine arteritis virus and other unknown agents. This may produce areas of testicular degeneration.

• Strongyle larvae can produce adhesions between the testis and its tunics.
• Age- associated vascular lesions such as hyaline degeneration in older bulls, rams and dogs causing degenerative changes in the seminiferous tubules.
• Varicocele may effect both the circulation of blood and the heat regulatory mechanism of the pampiniform plexus. Varicoceles may be rarely palpated in rams.

 

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