Morpho-metrical Observations on Trypanosoma evansi isolated from Slaughtered Camels in Assiut, Egypt and Study their Behavior Through Serial Mice Passages

Trypanosoma evansi (T.evansi) is a haemoflagellate extracellular parasite causing a well-known disease termed surra, and its occurrence greatly influences livestock development (Luckins, 1988).T. evansi isn't only spread by mechanical transmission by biting flies Tabanus spp.and Stomoxys spp., but also during nursing, copulation or ingestion of infected tissues by carnivores (Womak, 2001).In countries with hot and mild temperatures and where camels are bred, surra is the major enzootic disease for camels with an incredibly large geographic range.(Eyob and Matios, 2013).It was reported in several Asian countries, African countries, South and Central America (Da Silva et al., 2010, Sow et al., 2014).T. evansi multiplies in a mammalian host by the process of longitudinal binary fission in the trypomastigote stage (Hoare, 1972).In Egypt, T. evansi is a major livestock disease causing significant losses in camels (Abdel-Rady, 2008).There is also one rare case report of a human being infected with T. ev-