Prevalence of ticks on local and crossbred cattle in and around Asella town, southeast Ethiopia

The prevalence of bovine tick species in and around Asella town was studied over a period of eight months from October 2007 to May 2008. Adult ticks were collected from 384 local and crossbred cattle which were kept under extensive management system and at different agro-ecological zones. A total of 6298 adult ticks were collected from half body part of cattle, and were identified to genera and species level. Five tick species of four genera were identified, in which two species belong to genus Amblyomma, and one species each in the genus Boophilus, Rhipicephalus and Hyalomma. Of all the total ticks collected, Amblyomma, Rhipicephalus, Boophilus and Hyalomma constituted 60.1%, 22%, 15.4% and 2.5%, respectively. The tick species encountered were A. variegatum (48.2%), Rhipicephalus evertsi-evertsi (22%), Boophilus decolaratus (15.4%), A. cohaerence (11.9%) and Hyalomma marginatum rufipes (2.5%). The burden of ticks on cattle had statistically significant difference (