Characteristics of metabolic disorders in laying hens with dermanyssosis

Dermanyssosis is a common ectoparasitic disease of birds. Some characteristics metabolic disorders were identified in Hy-Line laying hens with such disease. The caused by Dermanyssus gallinae, poultry red mite, was detected during complex parasitological survey one two industrial buildings inspected. A high degree mite infestation found the building where experimental group kept. This condition considered to be stress factor for hens, i.e. as disturbance their comfortable living conditions. D. gallinae parasite decrease erythrocytes and leukocytes, hemoglobin concentration hens. Changes content some stress-associated hormones analyzed, they showed an increase cortisol levels triiodothyronine. Multiple rate organism infested revealed. In dermanyssosis stimulation gluconeogenesis occurred proportion oxygen-free glycolysis These changes obviously due molecular effects stress. from have concentrations lipid peroxidation products compared control. Increased found, together total antioxidant defense hens’ organisms. research results add our understanding how impacts