histomoniasis


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Related to histomoniasis: Blackhead disease, Histomonas meleagridis

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.
References in periodicals archive ?
Until 1950, arsenicals were the only compounds that were used to control histomoniasis in the field (Joyner et al.
Ceca of birds in the infected group (HM-M200 and HM-M500) of the in vivo study showing highest lesions of histomoniasis were transferred to culture media, and H.
market share, for decades to prevent histomoniasis (blackhead disease) and coccidiosis (parasitic infection) and to improve weight gain and meat pigmentation (Abraham et al.
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.
The aim of our investigation was to establish a conventional polymerase chain reaction (PCR), a nested PCR, and a real-time PCR, and to examine their specificity and sensitivity in the diagnosis of histomoniasis.