A specific oligoteratozoospermia in a bull: The sperm tail stump defect |
| |
Authors: | J. Arriola L.A. Johnson M. Kaproth R.H. Foote |
| |
Affiliation: | 1. Department of Animal Science, Cornell University, 14853 USA;2. U.S. Reproduction Laboratory, Department of Agriculture, ARS, Beltsville, MD 20705, USA;3. Eastern Artificial Insemination Cooperative Inc., Ithaca, NY 14850 USA |
| |
Abstract: | The first known case in the United States of a bull with the sterilizing oligoteratozoospermia known as “sperm tail stump defect” is reported. Ejaculates of semen were characterized by a watery appearance, extremely low sperm concentrations, sperm akinesia, and 100% abnormal spermatozoa. Different degrees of partial tail development were observed. The most common abnormalities were a short midpiece remnant or a cytoplasmic droplet-like rounded body replacing the midpiece and tail. Also, a high percentage of sperm head abnormalities were found. Testicular histology revealed seminiferous tubules with a low rate of spermatogenesis. Elongation of the spermatids did not proceed normally and no normal tail development was observed. |
| |
Keywords: | bull sperm defect oligoteratozoospermia |
本文献已被 ScienceDirect 等数据库收录! |
|