Background: Small ruminant playing significant economic development and cultural roles for smallholders and reared in different agroecological systems in Ethiopia. However, ticks and tick-borne haemopathogens are major threats to the health of small ruminants leading to loss of production and productivity in Ethiopia especially in north-western Ethiopia, due to climate and agroecological system favourable to the tick survival in the area.
Objectives: The objectives of this study were to determine the prevalence of Ixodid tick infestation and tick-borne haemopathogens, to identify the existing Ixodid tick species and to investigate major risk factors associated with tick infestation and tick-borne haemopathogens.
Methods: A cross sectional study was conducted on 396 small ruminants (sheep =198 and goats = 198). Ticks were identified to the species level according to their morphological key structures. Thin blood smear were prepared and laboratoricaly examined to investigate tick-borne haemopathogens. Logistic regression was employed to assess the association between potential risk factors with tick infestation and tick-borne haemopathogens.
Results: The overall prevalence of tick infestation and tick-borne haemopathogens were 47.22% and 4.29%, respectively. Age, species, body condition, agroecological system and season were found significantly (p < 0.05) associated with tick infestation. Season was found to be significantly (p < 0.05) associated with occurrence of tick-borne haemopathogen. Amblyomma variegatum (18.2%) and Rhipicephalus evertsi evertsi (13.4%) were the predominant tick species encountered. Anaplasma ovis, Anaplasma marginale and Babesia ovis were prevalent tick-borne haemopathogens.
Conclusions: The present study reported that there was higher tick infestation and tick-borne haemopathogens infections on small ruminants in the study area. Therefore, based on tick epidemiology, a strategic tick control programs were needed in this region. Further detailed studies on the role of Ixodid tick species in causing tick-borne diseases in small ruminants and their economic impact on livelihoods should be conducted.
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| http://dx.doi.org/10.1002/vms3.1080 | DOI Listing |
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