Feeding cyromazine to Luhmann hens: residues in tissues and effects on some biochemical constituents

Cyromazine was fed to Luhmann hens at 0.15 ppm level supplemented the basal diet for 3 weeks. The build up of cyromazine residues in liver and muscles of hens up to 7th day, the balance between cyromazine intake and elimination had taken place between 7 and 10 days. After cyromazine was withdrawn from the diet its residues was depleted within 7 days. During the 3 weeks of feeding on the treated diet, the accumulated residues reduced the blood glucose and hepatic protein significantly up to 2 weeks, while the hepatic lipids was slightly increased on the 7th day. Also such residues had adverse effects on the activities of alkaline phosphatase (AP) and transaminases (GOT, GPT) and extend on red blood cells, white blood cells, hemoglobin content (Hb) and packed cell volume (PCV) compared with the untreated hens.