MORPHOLOGICAL CHANGES IN BLOOD FORMING AND IMMUNE ORGANS OF CHICKENS, VACCINATED AGAINST INFECTIOUS BRONCHITIS

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  • S. V. GURALSKA

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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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