Abstract
In this study (28) ewes where examined and they were infected with Ostertagia circumcincta and Marshallagia marshalli, divided in to four equal groups. The 1st, 2nd and 3rd groups were treated with ivermectin in a dose of 0.2 mg/kg, s.c.,levozan at a dose of 2.5 ml/kg and albendazole in a dose of 10 mg/kg. The 4th group was untreated and considered a control group. Faecal samples were collected for searching for eggs and blood samples to examine (blood picture and phagocytosis coefficients) for these groups for three weeks before and after treatment. It showed the Ivermectin was 100% effective in the first week after the treatment in compared with the levozan and albendazole treated groups. It was also observed that there was an increasing in phagocytosis coefficients percentage in the groups treated by Ivermectin and levozan was higher than group treated by albendazole were compared with the control group.