Trypanosoma evansi infection in dogs: seasonal prevalence and chemotherapy.

A 1-year survey was undertaken to determine the incidence of Trypanosoma evansi in dogs at Ludhiana, India. Of 64 dogs examined by wet film, thin smear, thick smear and mouse inoculation, three (4.68%) were found to be positive for T. evansi. All the positive animals were detected during the rainy and post-rainy seasons. The treatment of three infected dogs with a combination of quinpyramine sulphate and chloride (3:2 w/w) resulted in complete recovery of two dogs; another dog died on the day therapy was initiated.