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  • Title: Effect of storage media and storage time on survival of spermatozoa recovered from canine and feline epididymides.
    Author: Tittarelli C, Savignone CA, Arnaudín E, Stornelli MC, Stornelli MA, de la Sota RL.
    Journal: Theriogenology; 2006 Oct; 66(6-7):1637-40. PubMed ID: 16472848.
    Abstract:
    The aim of this study was evaluate the survival ability of canine and feline spermatozoa maintained within epididymides stored at 4 degrees C for 24, 48 or 72 h in sterile isotonic saline solution (SAL) or a Tris-egg yolk (TEY) storage medium. Fifteen domestic dogs and 15 cats were neutered and their testes were placed in TEY or SAL and stored at 4 degrees C for either 24, 48 or 72 h. Sperm samples were obtained by cutting the cauda epididymides into a Tris extender and were evaluated for motility, velocity, viability, plasma membrane integrity, and acrosome morphology. In dogs, there were no significant differences between storage media for motility, plasma membrane integrity, viability and velocity. However, dog sperm stored in TEY had better acrosome morphology compared to sperm stored in SAL (P < 0.05). Dog sperm recovered at 72 h had a reduction in all parameters studied compared to those recovered at 24 h (P < 0.05). In cats, sperm recovered from epididymides stored in TEY had higher motility, plasma membrane integrity and velocity at all times compared to those stored in SAL (P < 0.05). Cat sperm recovered at 72 h had reduced motility, acrosome morphology, viability and velocity compared to those recovered at 24 h (P < 0.05). The addition of TEY to canine epididymal sperm, thus, had a better protective effect than SAL only on acrosome morphology. In cats, in contrast, TEY had a better protective effect than SAL on all epididymal sperm parameters studied. In both species, sperm recovered at 72 h had a significant reduction in all parameters studied compared to those recovered at 24 h.
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