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histomoniasis

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histomoniasis
a very widespread disease of gallinaceous birds, especially turkeys, caused by the protozoan parasite Histomonas meleagridis. It is characterized by ulceration of the cecal mucosa and necrotic foci in the liver.


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Gross and microscopic lesions were observed on days 7, 14, 21, 28, and 35 post infection to evaluate any clinical histomoniasis in ducks and to appraise the histomonad's carriage.
Blackhead, or histomoniasis, is spread through a microscopic parasite in earthworms.
These studies confirm that histomoniasis is transmitted readily from directly exposed young turkeys to others in the absence of the cecal worm vector, and that this phenomenon can be reproduced in battery cages as an experimental model.
 
 
 
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