Abstract
BLACKHEAD (entero-hepatitis), a widespread and generally fatal disease of turkeys, was attributed to a protozoon, Amaeba meleagridis, by Theobald Smith1. Later, Tyzzer confirmed its presence in caecal lesions and renamed it Histomonas (gen. nov.) meleagridis Smith2. Although there is no difficulty in infecting young chickens experimentally with H. meleagridis (Tyzzer3) the disease produced is not severe, and the chickens soon recover clinically, though they may remain carriers, passing Protozoa in their faeces, for long periods. Theobald Smith4 saw Amaeba (= Histomonas) meleagridis in liver sections from diseased fowls, and Tyzzer5 found similar lesions in a two-year-old hen. Although Drbohlav6 and afterwards Tyzzer7 cultivated Histomonas meleagridis from the caecal discharges of experimentally infected chickens, all attempts to cultivate the parasite from diseased tissues from either turkeys or chickens failed (Tyzzer7).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
