الفهرس 
Some studies on the role of ticks in transmitting trypanosoma spp.in farm animals
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Abstract
Sucking insects, TseTse (Glossina sp.) is the main vector of Trypanosoma species and generates a significant economic impact on livestock. Trypanosoma evansi is mechanically transmitted in several ways. Soft tick species have also been suggested as vectors in the transmission of T. evansi. In the present study, during the period from April 2015 till March 2016, 970 cattle and 683 camels from Beni Suef, Giza and Red Sea Governorates were clinically examined for presence of ticks. Of the examined cattle, 495 (51%) were found infested by Rhipicephalus (Boophilus) annulatus ticks and of the examined camels, 265 (38.79%) were found infested by Hyalomma dromedarii ticks. Also, Ornithodoros savignyi were collected from camel pens at Shalateen City (Red Sea Governorate). Seasonal influence on the prevalence of ticks in camels and cattle was also studied revealing that the peak of tick infestation rate was during the period from June to November. Four hundred and thirteen (413) blood samples (201 blood samples from cattle and 212 from camels) were collected and examined for Trypanosoma infection by thin blood smear. The present work was initiated to estimate the role of O. savignyi ticks in experimental transmission of T. evansi to the laboratory animals. The collected T. evansi from naturally infected camels was propagated in pathogen free Swiss albino mice to be used in the experimental infection. Groups of pathogen free albino rats were inoculated with T. evansi to be used in experimental infection of Trypanosoma free O. savignyi ticks