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- W2041770793 abstract "Abstract The effect of trypanosomiasis on reaction time and semen characteristics of 24 Zebu bulls was studied. Eight of the bulls were infected with T. vivax , another eight with T. congolense and the remaining eight bulls served as controls. The preinfection mean value of the rectal temperature was 101.0 °F, and this rose to a mean of between 104·5 and 105·5 °F in the infected animals. Concurrently the latter animals exhibited signs of anaemia shown by pale mucous membranes and decreased PCV, weight loss, lethargy, weakness and dullness. The reaction time of semen collection significantly increased from a pre-infection mean value of 24·3–60·13 seconds to a mean of 14·25–267·25 seconds within 12 weeks post-infection. Semen characteristics deteriorated progressively within the same period in the infected bulls. There were highly significant and drastic decreases in sperm concentration and volume of semen and increases in abnormal sperm cells. By the sixth week, the 16 infected bulls were unfit for breeding because of very poor semen characteristics. Deterioration continued to the end of the investigation. The present results indicate that T. congolense appeared more virulent and devastating in its effect on the reaction time (ejaculation time) and on the destruction of germinal epithelium which resulted in poor semen quality. This is of particular significance to livestock farmers in trypanosome endemic regions, the practical implication being infertility in infected bulls." @default.
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- W2041770793 date "1988-07-01" @default.
- W2041770793 modified "2023-10-17" @default.
- W2041770793 title "The effect of Trypanosoma vivax and Trypanosoma congolense infections on the reaction time and semen characteristics in the Zebu bull" @default.
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- W2041770793 doi "https://doi.org/10.1016/0007-1935(88)90070-x" @default.
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