Abstract
This study was carried out to assess the distribution, abundance of different tick genera and prevalence of Theileria parva infection in Tarime zebu cattle kept in selected wards of Serengeti and Tarime districts in Mara region. Adult ticks were identified and counted from half body parts of 360 animals which were extensively managed in communal land with natural pastures. Concurrently, blood samples were collected and thereafter DNA extracted and a nested polymerase chain reaction (nPCR) was done using primers specific for p104 gene to detect the presence of T. parva DNA. Ticks were identified into four groups: Amblyomma genus, Boophilus sub-genus of Rhipicephalus genus, other species of Rhipicephalus, and Hyalomma genus. Rhipicephalus genus accounted for 71.8 % of the total ticks, whereas Amblyomma, Boophilus sub-genus of Rhipicephalus genus and Hyalomma constituted 14.1, 14.0 and 0.1 %, respectively. There were more animals (p < 0.05) infested with ticks in Tarime district (96.1 %) than in Serengeti (61.7 %). The average counts of ticks were higher in adult animals (p < 0.05) than in young animals. The overall prevalence of T. parva was 27.7 % and was higher (p < 0.05) in Serengeti (38.3 %) than in Tarime district (16.7 %). However, all animals tested positive for T. parva did not show any clinical signs of East Coast fever (ECF), suggesting the existence of subclinical infection in Tarime zebu. These results suggest that Tarime cattle can tolerate ECF infection and are likely to serve as potential carriers of T. parva to other less-tolerant cattle breeds in mixed herds. Since Tarime cattle are preferred by most farmers with mixed herds, routine screening for T. parva is highly recommended to minimize introduction of infected cattle into an immunologically naive population.
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Acknowledgments
We acknowledge the generous financial support from the Norwegian Agency for International Development (NORAD) through the programme for Enhancing Pro-poor Innovation in Natural Resources and Agricultural Value Chains (EPINAV) at Sokoine University of Agriculture. We also would like to thank the district veterinary and livestock officers as well as the village extension officers in these districts for their assistance during field work. We thank the livestock farmers for allowing us to use their animals for the experiments.
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The authors declare that they have no conflict of interest.
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Laisser, E.L.K., Kipanyula, M.J., Msalya, G. et al. Tick burden and prevalence of Theileria parva infection in Tarime zebu cattle in the lake zone of Tanzania. Trop Anim Health Prod 46, 1391–1396 (2014). https://doi.org/10.1007/s11250-014-0651-0
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DOI: https://doi.org/10.1007/s11250-014-0651-0