Narastanie opornosci kurczat do przewlekle powtarzanego stresu

In chickens (84 birds) divided into 5 groups there was applied stress in the form of binding of legs and wings for 5 hours per day. Blood was taken by bleeding a group of 12 chickens after 1, 3, 7, 14, and 28 days. The level of adrenalin, noradrenalin and corticosterone were determined in the blood. The studies revealed a permanent significant decrease of the tested hormones up to 14 days of the experiment. At day 28 an increase of their levels was noted again. It was found a marked deviations in immunological indices as well.