MATERIALS AND METHODS
In present study, 50 mature horses were selected which were suffered from weight losing. These horses were belonged to the Tabriz suburb farms. In this period, we were taking history from horses by asking some questions from the owner then we were recording the gender, age, previous history of illness, during of illness, previous vaccinations, used anti-parasitic medicines and body condition score. Then, general examination was done. After that, we assayed the animals’ diet and samples were obtained (100 g) for measurement of it protein and energy balance. Later on, blood samples were taken from jugular vein for preparing the slid and Giemsa staining. In this term, cells were assayed morphologically. Finally, parasitology experiments were done. Data were recorded and analysed by SPSS software.