MORPHOLOGICAL CHANGES IN BLOOD FORMING AND IMMUNE ORGANS OF CHICKENS, VACCINATED AGAINST INFECTIOUS BRONCHITIS
Abstract
The article presents data on the effect of vaccination of chickens against infectious bronchitis on body weight and absolute immunity organs` weight. Our researches have shown that while immunization chickens against infectious bronchitis the diminishing of thymus and bursa of Fabricius absolute weight is observed. This fact proves the increasing migration of T- and B-lymphocytes to the peripheral immune organs for making active immune reactions.
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