Abstract
A cross sectional study was conducted from October, 2010 to April, 2011 in three districts of West Amhara region located in the Abbay river basins namely Debre Elias, Dembecha, and Jabitehenandistrict, northwest of Ethiopia. The objectives of the study were to determine the prevalence rate of bovine Trypanosomosis and significance of associated risk factors in the study area. Blood samples were collected from 570 randomly selected local (zebu) breed of cattle in 8 Peasant Associations of three districts. The collected blood samples were examined using hematological and parasitological techniques (Buffy coat examination and thin blood smear). The overall prevalence of Trypanosomosis was found to be 6.49% and it consists of 5.62%, 3.75% and 10.56% in Debre Elias, Dembecha and Jabitehenan, respectively. Trypanosome conglense(5.26%) and Trypanosome vivax (1.23%) were the most common species encountered during study period. There were no statistical significance difference (P>0.05) between sexes, age, body condition and previously treated and untreated groups. But significance difference were observed in coat color of skin, altitude and districts (P<0.05). The mean PCV value of infected animals were (22.15±5.01SD) significantly (P<0.05) lower than that of non infected animals (26.21±5.1307 SD) and also the mean PCV value of animals in low land area was significantly different (P<0.05) from mid and highland areas. The study revealed that bovine trypanosomosis is more prevalent in low land and in black coat color skin of animals in the study area.
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