This study was conducted in dairy farms in Nyala town, South Darfur. Cattle of
different age group, breed and sex were randomly sampled for ticks, blood
smears and serum samples. Sampling was carried out on a monthly basis for one
year starting from June 2006 to May 2007. The prevalence rate of Theileria spp.
was 3.6% (43/1200) based on Giemsa’s stained blood smears. Using indirect
fluorescent antibody test, out of 100 serum samples, 31 (31%) were positive for
T. annulata antibodies. Four genera and thirteen species of ticks were found
infesting cattle in the area. These were Amblyomma variegatum, A. lepidum,
Rhipicephalus (Boophilus) annulatus, R.(B.) decoloratus, Hyalomma anatolicum,
H. anatolicum excavatum, H. dromedarii, H. impeltatum, H. impressum, H.
marginatum rufipes, H. truncatum, Rhipicephalus evertsi evertsi and R. s.
sanguineus. The impact of ticks and tropical theileriosis on cattle in South
Darfur State is discussed. It is recommended that introduction of cattle from
Central Sudan should be accompanied by strict tick control measures. Planned
tick control programme on farms where H. anatolicum is present is highly
recommended. Spread of this tick species to other farms, towns and probably
across the international borders must be prevented.