[Effect of Mecadox therapy on various organs of the reticulohistiocytary system in chickens].

Chickens received Mecadox treatment for 28 days, beginning at the age of five days, with the daily rations having been 1 g in 1 kg feedstuff. Changes were caused in two periods. The first therapeutic period, first to 14th days, was characterised by rise in total protein, DNA, RNA, amino nitrogen, and ascorbic acid in the adrenal gland as well as by rise in body mass, however, with no change of thymus and bursa mass. The second therapeutic period, between the 14th and 28 th days, led to decline in the above parameters and to involution of the lymphatic organs. The conclusion is suggested that biological stimulation can be achieved only in response to short-time Mecadox treatment.