Trypanosomiasis (Surra) in Cattle: A Hidden Threat to Livestock Productivity
Introduction Trypanosomiasis is a multi-component disease of parasitic origin. This condition is associated with the development of protozoans belonging to the genus Trypanosoma in the blood vessels. As regards South Asia , trypanosomiasis, caused by Trypanosoma evansi , is widespread in Pakistan . Transmisson Cycle The mechanical transmission occurs through biting flies, namely Tabanus ( Horse Flies ) and Stomoxys ( Stable Flies ). The life cycle of parasites does not happen inside the fly as this insect serves only as "a flying needle." Manifestations There are two types of the disease, acute and chronic forms. The symptoms vary considerably depending on its type. It explains why it is also referred to as Intermittent Fever . Intermittent Fever. The fever varies in accordance with the fluctuations of parasite waves in the bloodstream. Anemia. Parasites cause the destruction of red blood corpuscles resulting in pale mucous membranes. Fast Weight Loss. Although th...