Trypanosoma evansi Assessment in Equines: A Study in One Decade in an Endemic Area of the Canary Islands, Spain

Trypanosoma evansi was diagnosed in a camel in the Canary Islands for the first time in 1997, and the parasite is still present in a little area of the Archipelago. Since then, the disease has exclusively affected camel herds, and clinical evidence of the infection has not been demonstrated in any other animal hosts. In the frame of a control plan of the disease in the Archipelago, 864 equines located in the infected area were examined during one decade (2001-2010), of which a total of 26 (3%) were serologically positive but showed negative results at parasitological and molecular examinations. FreeCalc, an epidemiological tool to detect presence/absence of disease, showed that the population would be diseased at a confidence level of 99.916%. These results must suppose to implement the control plan against the disease including the equine population present in the surrounding area of the infected camel farms.