Written by: Dr. Jacquie Jacob, University of Kentuckyhttps://articles.extension.org/pages/68108/blackhead-in-poultryBlackhead, also referred to as histomoniasis, is a disease caused by the protozoan Histomonas meleagridis. This disease initially affects the intestinal ceca and liver, causing tissue destruction. This disease primarily affects turkeys, but other poultry species can be infected as well. Pheasants, ducks, and geese appear to be immune to the effects of blackhead. Chickens are somewhat resistant to blackhead. Turkeys and peafowl are the most susceptible.
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