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Seasonal variation in trypanosome parasitological infection rates in small ruminants was studied at the Kaduna Central abattoir, North Central Nigeria. Blood samples were obtained at slaughter from 320 goats and 209 sheep during the dry and rainy seasons and examined using the Haematocrit Centrifugation Technique, Buffy coat method and Giemsa stained blood smears. The packed cell volume of the animals were also obtained. The over all trypanosome infection rate in all small ruminants was 2.10%. Infection rates in sheep and goats were 2.39% and 1.88% respectively. The infection rates were higher in rainy season than the dry season while Trypanosoma vivax was the dominant infecting trypanosome in all the ruminants followed by T.congolense and T. brucei. Infection rates observed here were relatively high and confirmed the resurgence of animal trypanosomosis in the country and its threat to sustainable livestock production. (Afr. J. Biomed. Res. 11: 229 - 232) Key Words: Trypanosomosis, infection-rates, season, Kaduna, Nigeria.

Seasonal Variation in Trypanosomosis Rates in Small Ruminants at the Kaduna Abattoir, Nigeria