Abstract:
A cross-sectional study was conducted from November 2013 to April 2014 to assess the prevalence
of bovine trypanosomosis and apparent density of tsetse flies in four kebeles of Sayo district of KelemWollega
zone, Ethiopia. The overall apparent densities of tsetse flies in each study areas were determined by using
monopyramidal, biconical and ingu traps. It indicated that, Glossina tachnoides, Glossina morsitons sub
morsitons and Glossina pallidipes were the tsetse flies species caught along with other biting flies.
Overall 16.9% prevalence of bovine trypanosomosis was recorded among 585 blood samples collected from
randomly selected animals using buffy coat method. The result revealed that, Trypanosoma congolense was
the dominant species (69.7%), while the lowest infection was co-infection of Trypanosome congolense and
Trypanosome vivax (2.0%). The highest prevalence 33 (5.6%) of the disease was recorded in Ripa while the
lowest 13 (2.2%) was recorded in Minko-lencha Kebeles. The mean packed cell volumes (PCV) were 24% and
26% (95%) in parasitaemic and in aparasitaemic animals respectively. There was statistically significant
difference (p<0.05) in prevalence of the disease among the different kebeles, body conditions scores and PCV
values. The presence of different species and high densities of vectors in the studied areas along with a
relatively higher prevalence of the disease in the area warrants the initiation of appropriate prevention and
control measures
