Surra, caused by Trypanosoma evansi, is one of the most important diseases of animals in tropical and semitropical regions. While surra is particularly serious in equids and camels, infections and clinical cases have been reported in most domesticated mammals and some wild species. T. evansi is transmitted mechanically by various tabanids and other flies, and it can readily become endemic when introduced into a new area. The morbidity and mortality rates in a population with no immunity can be high. In the early 1900s, an outbreak in Mauritius killed almost all of the Equidae on the island. More recently, severe outbreaks have been reported in the Philippines, Indonesia and Vietnam. In addition to illness and deaths, surra causes economic losses from decreased productivity in working animals, reduced weight gain, decreased milk yield, reproductive losses and the cost of treatment.
Iowa State University
Iowa State University Center for Food Security and Public Health, "Surra" (2015). Center for Food Security and Public Health Technical Factsheets. 128.