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- Q178719 subject Q13301559.
- Q178719 subject Q6304253.
- Q178719 subject Q7482528.
- Q178719 abstract "Blackhead disease (also known simply as blackhead) is a commercially important avian disease that affects chickens, turkeys and other poultry birds. The disease carries a high mortality rate and primarily affects the liver and cecum. It is a form of histomoniasis which is transmitted by the protozoan parasite Histomonas meleagridis. The protozoan is in turn transmitted by the nematode parasite Heterakis gallinarum. H. meleagridis resides within the eggs of H. gallinarum, so birds ingest the parasites along with contaminated soil or food. Earthworms can also act as a paratenic host. A characteristic symptom of the infection is the development of cyanotic (bluish) discoloration on the head, giving rise to the common name of the disease, "blackhead".Poultry (especially free-ranging) and wild birds commonly harbor a number of parasitic worms with only mild health problems from them. Turkeys are much more susceptible to getting blackhead than are chickens. Thus, chickens can be infected carriers for a long time because they are not removed or medicated by their owners, and they do not die or stop eating/defecating. H. gallinarum eggs can remain infective in soil for four years, a high risk of transmitting blackhead to turkeys remains if they graze areas with chicken feces in this time frame.The most common symptom of blackhead disease is yellow, watery bird droppings. To reduce the spreading of the disease, sick birds must be removed and their litter changed.".
- Q178719 thumbnail Histomoniasis.jpg?width=300.
- Q178719 wikiPageExternalLink main.aspx.
- Q178719 wikiPageExternalLink 203000.htm.
- Q178719 wikiPageExternalLink Print.htm.
- Q178719 wikiPageExternalLink Histomoniasis.
- Q178719 wikiPageExternalLink histomonosis-and-the-differential-survival-of-poultry-species.
- Q178719 wikiPageWikiLink Q101274.
- Q178719 wikiPageWikiLink Q12136.
- Q178719 wikiPageWikiLink Q124378.
- Q178719 wikiPageWikiLink Q13301559.
- Q178719 wikiPageWikiLink Q166231.
- Q178719 wikiPageWikiLink Q1663054.
- Q178719 wikiPageWikiLink Q169872.
- Q178719 wikiPageWikiLink Q1755357.
- Q178719 wikiPageWikiLink Q178559.
- Q178719 wikiPageWikiLink Q1834239.
- Q178719 wikiPageWikiLink Q185317.
- Q178719 wikiPageWikiLink Q186517.
- Q178719 wikiPageWikiLink Q192120.
- Q178719 wikiPageWikiLink Q3719086.
- Q178719 wikiPageWikiLink Q43794.
- Q178719 wikiPageWikiLink Q496.
- Q178719 wikiPageWikiLink Q5113.
- Q178719 wikiPageWikiLink Q5185.
- Q178719 wikiPageWikiLink Q5675260.
- Q178719 wikiPageWikiLink Q58702.
- Q178719 wikiPageWikiLink Q6304253.
- Q178719 wikiPageWikiLink Q7136118.
- Q178719 wikiPageWikiLink Q7482528.
- Q178719 wikiPageWikiLink Q780.
- Q178719 wikiPageWikiLink Q9368.
- Q178719 comment "Blackhead disease (also known simply as blackhead) is a commercially important avian disease that affects chickens, turkeys and other poultry birds. The disease carries a high mortality rate and primarily affects the liver and cecum. It is a form of histomoniasis which is transmitted by the protozoan parasite Histomonas meleagridis. The protozoan is in turn transmitted by the nematode parasite Heterakis gallinarum. H. meleagridis resides within the eggs of H.".
- Q178719 label "Blackhead disease".
- Q178719 depiction Histomoniasis.jpg.