Peer-reviewed veterinary case report
Beagle dog sperm with detached and coiled tails explained
By Kawakami, Eiichi et al.·Published in The Journal of veterinary medical science·2005·Department of Reproduction, Japan·View original on PubMed →
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Original publication title: Formation of detached tail and coiled tail of sperm in a beagle dog.
- Species:
- dog
Plain-English summary
A Beagle dog was found to have a high number of sperm with abnormal tails, specifically detached and coiled tails. The dog's right testis and epididymis were surgically removed for examination, revealing that many of the abnormal sperm were produced in the testis and increased in number as they moved through the epididymis. This suggests that the sperm tails were becoming detached due to issues occurring in the epididymis. The findings indicate a potential fertility problem for the dog, which may need further evaluation by a veterinarian.
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Abstract
The right testis and epididymis were excised from a Beagle dog that ejaculated high percentages of sperm with detached tails and with coiled tails. Cross sections of the organs were stamped on glass slides and histological examination of the organs was performed to find the portion where sperm with the abnormal tails appear. Many sperm with tails whose axoneme was exposed near the neck region were observed in the testis and they decreased in order from the caput, to the corpus, and the cauda epididymis. Sperm with detached tails and sperm with coiled tails gradually increased in the epididymis. These findings indicate that the tails of sperm with an exposed axoneme detached in the epididymis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15699600/