Original Scientific Article
Effects of experimental Trypanosoma congolense infection on sperm morphology in Yankasa rams
Oluyinka O. Okubanjo
*
,
Victor O. Sekoni
,
Ologunja J. Ajanusi
,
Adewale A. Adeyeye
Abstract
The objective of the study was to determine the effect of T. congolense on the sperm morphology of Yankasa rams (YKR). Nine YKR aged 24-30 months-old were assigned into two groups of 6 infected and 3 uninfected control and were monitored for 7 weeks. The infected group of YKR was each inoculated with 1 x 106 T. congolense through the jugular vein, while the control group remained uninfected. The entire infected group developed trypanosomosis post infection (pi) characterized by sperm morphological abnormalities in the semen. There were significant (P<0.001) increases in the mean percentage of acrosomal, head, middle piece and tail abnormalities. Proximal and distal droplets as well detached heads were also significantly (P<0.001) increased post infection (pi). Acrosomal abnormalities, distal droplet and tail abnormalities increased from week 1 pi till the end of the study, while head abnormalities and detached heads increased from week 2 pi. Middle piece abnormalities and proximal droplets increased from week 3 and 4 pi till the end of the study respectively. The high incidence of morphological defects caused by T. congolense is capable of causing infertility from the first week pi thereby making the rams unfit for breeding at the end of the study.
Keywords: infertility, sperm abnormalities, spermatogenesis, Trypanosoma congolense, Yankasa rams
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Copyright
© 2015 Okubanjo O. O. This is an Open Access article distributed under the terms of the Creative Commons Attribution-Non Commercial License (http://creativecommons.org), which permits unrestricted non-commercial use, distribution, and reproduction in any medium provided the original work is properly cited.
Conflict of Interest Statement
The authors declared that they have no potential conflict of interest with respect to the authorship and/or publication of this article.
Citation Information
Macedonian Veterinary Review. Volume 38, Issue 2, Pages 203-208, p-ISSN 1409-7621, e-ISSN 1857-7415, DOI: 10.14432/j.macvetrev.2015.07.050, 2015
10.14432/j.macvetrev.2015.07.050
