Abstract   

    Broiler chicks of 2 weeks of age were grouped and fed lead (1200 mg/kg feed), selenium (15 mg/kg feed), selenium plus vitamin E (15 + 200 mg/kg feed) and monensin (240 mg/kg feed) to induce subacute toxicosis. One group was kept on basal feed. After four weeks the first subgroup from each group was perorally given 250 mg levamisole/kg body mass, the second subgroup was subcutaneously administered 100 mg levamisole/kg body mass and the third subgroup was given no treatment. The oral administration of levamisole did not produce any clinical signs. The subcutaneous administration of levamisole resulted in shivering, partial or complete paralysis and death in different groups. The higher number of death and severe clinical signs following levamisole subcutaneous administration were observed in birds subacutely intoxicated with lead, selenium and monensin compared with control group. This observation suggests that subacute toxicosis of these substances may alter the clinical pattern of levamisole toxicosis.    

Key words: Levamisole, Lead, Selenium, Monensin, Toxicosis.