histomoniasis

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histomoniasis

(hĭs′tə-mə-nī′ə-sĭs)
n.

histomoniasis

A protozoa infection by Histomonas meleagridis, which involves the caeca and later the liver, of turkeys (in which it is often fatal), chickens and other galliform birds.

Epidemiology
The causative agent, Histomonas meleagridis, is typically transmitted in embryonated eggs of the cecal nematode Heterakis gallinarum , or by direct contact with infected birds.

Clinical findings
Listlessness, drooping wings, unkempt feathers and yellow droppings. Young birds have more acute disease and die within a few days; older birds tend to live longer.

his·to·mo·ni·a·sis

(his'tō-mŏ-nī'ă-sis)
A disease chiefly affecting turkeys, caused by Histomonas meleagridis and characterized by ulcerative and necrotic lesions of the liver and cecum, acute onset, and a high mortality rate. It is transmitted inside the eggs of the nematode Heterakis gallinae, which is primarily responsible for maintaining and spreading the infection.
Synonym(s): blackhead (2) .

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.