R. Ivanova
Abstract. Most of the small ruminant flocks on the Balkan Peninsula are bred on pasture. Thus the animals are endangered to graze treated alfalfa, without observing quarantine. The instability of the pyrethroid insecticides in rumen alkaline pH of the sheep is the reason for its absorption as early as in the upper part of the digestive tract and hence a better-expressed subtoxicosis appeared. Following the technological instruction given by the producer of the insecticide, the alfalfa field plots were treated with Supersect 10 EC. After seven days quarantine, the alfalfa was mowed, dried and added to the ration of the tested animals. After 20 days feeding of the animals, a decrease in the amount of the total lipids was established, without any changes of the blood glucose and total protein values. As regards the enzymatic profile of sheep fed on alfalfa treated with Supersect 10 EC, a significant increase of the activities of ASAT, LDH, MAO and ChE was reported. Based on the data obtained, we could conclude that when sheep was fed on alfalfa treated with Supersect 10 EC, a strong change in the enzymatic profile was observed. There were not significant changes in hepatocyte according to De Rites but the metabolic strain in the organism was suppressed as compared to that of the control animals