Duckling are feeding peanut and meal detoxified or not by ammonia at the level of 25 p. 100. Control group are eating soybean meal at the same level. The raw protein content of diet is the same in each group. Experiment is carried out during four weeks, then duckling are killed. There is no significative difference between peanut meal detoxified and soybean meal relating to growth and food efficiency. Thus body weight is 775 and 764 g on duckling eating soybean meal; 764 and 827 g on duckling with peanut meal detoxified but only 472 and 452 g on birds with diet containing peanut meal not detoxified by NH3. Liver's weight is increased on these subjects. The ratio of liver weight to body weight X 100 is 5,49-4,79 and, respectively, 2,70-3,60 and 3,86-3,56 on duckling with detoxified peanut meal or controls eating soybean meal. Characteristic lesions of aflatoxicosis are developed on duckling consuming peanut meal not detoxified dosing about 285 mug/kg of Aflatoxin B1. Lesions are very slight, but present, on liver and kidney in detoxified peanut meal fed duckling. For kidney's lesions there are no differences between detoxified or not group, duckling eating detoxified peanut meal have absorbed 0,4 mug of Aflatoxin B1 during the eight first days of experiment and 8 to 10 mug during four weeks. These considerations explain light lesions observed and underlines duckling's sensitivity regarding aflatoxicosis.
