Abstract

A Burdizzo castrator was evaluated for the neuterino of dogs. Histological and morphological changes of spermatic cells and peripheral serum testosterone after challenge with a GnRH-analogue (gonadorelin) were assessed. There was a control group (G1), a surgically castrated group (G2) and a Burdizzo group (G3) divided in two, G3a receiving two Crunches in each spermatic cord and G3b receiving one crunch ill each spermatic cord. Sixteen days after application of the Burdizzo blood samples were taken from the dogs at 30 min interval during 2 h: after the second sample the dogs were treated with 1 mu g/kg body weight of gonadorelin i.v. The same protocol of gonadorelin challenge was performed in G1 and G2 dogs. The G2 dogs were surgically castrated after the second blood sample. before the gonadorelin treatment, and the G1 dogs after the last blood sample. The excised gonads were examined histologically. and sperm smears were prepared from the caudae epididymidis. The testes and plexus pampiniformis of the G1 and G2 dogs had a normal histological appearance, and they had morphologically normal epididymal sperm cells. In all G3 dogs, there was all acute fibrosis with an inflammatory reaction in the plexus pampiniformis. The testes from the G3a dogs showed diffuse areas of infarction and degeneration of the parenchyma. Similar but less diffuse lesions were seen in group 3b dogs. Hie deferent ducts from all G3 dogs showed vasitis and/or sperm granulomas. Azoospermia or sperm malformations were observed ill the epididymal smears from the G3 dogs. Testosterone concentration in the G1 dogs increased after gonadorelin application (p < 0.0001). The G2 dogs had basal testosterone levels after castration (p < 0.001) and did not respond to gonadorelin. Groups 3a and b showed a slight but non-significant increase in testosterone concentration after gonadorelin challenge. supposedly due to the reduction of testicular blood flow and loss of testicular interstitial tissue

Published in

Reproduction in Domestic Animals
2006, Volume: 41, number: 3, pages: 227-232
Publisher: BLACKWELL PUBLISHING

SLU Authors

• Linde-Forsberg, Catharina

  • Department of Clinical Sciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Veterinary Science
Animal and Dairy Science


Publication identifier

DOI: https://doi.org/10.1111/j.1439-0531.2006.00668.x

Permanent link to this page (URI)

https://res.slu.se/id/publ/9722