MySheen

Chicken infectious anemia-pathological changes

Published: 2024-09-19 Author: mysheen
Last Updated: 2024/09/19, The most characteristic pathological change of simple chicken infectious anemia is bone marrow atrophy. The bone marrow of thigh bone is fatty, yellowish or pink; thymus atrophy and hyperemia can lead to complete degeneration. With the increase of age of diseased chickens, thymus atrophy is easier to observe than bone marrow lesions. Fabricius bursa atrophy is not obvious and is often transient. Sometimes the weight decreases and the volume becomes smaller, while the appearance of the bursa of most diseased chickens is translucent. If the condition is serious, the liver and kidney can be enlarged and the yellow substance becomes brittle. Sometimes glandular gastric mucosal bleeding and subcutaneous and muscular bleeding can be seen.

The most characteristic pathological change of simple chicken infectious anemia is bone marrow atrophy. The bone marrow of thigh bone is fatty, yellowish or pink; thymus atrophy and hyperemia can lead to complete degeneration. With the increase of age of diseased chickens, thymus atrophy is easier to observe than bone marrow lesions. Fabricius bursa atrophy is not obvious and is often transient. Sometimes the weight decreases and the volume becomes smaller, while the appearance of the bursa of most diseased chickens is translucent. If the condition is serious, the liver and kidney can be enlarged and the yellow substance becomes brittle. Sometimes glandular gastric mucosal bleeding and subcutaneous and muscular bleeding can be seen.

Histopathological examination showed a decrease in red blood cells, platelets, granulocytes and their progenitor cells in the bone marrow, replaced by adipose tissue. Thymic atrophy is the result of the decrease of lymphocytes in cortex and medulla, as well as in bursa of Fabricius and spleen, but the degree and duration are not as serious as that of thymus.

 
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