1989 Volume 42 Issue 3 Pages 194-196
The liver and cecum from fighting chickens with histomoniasis were observed by electron micro-scopy. Protozoa of Histomonas meleagridis were seen in a large number in the liverand cecum. In the liver, only protozoa in the vegetative stage were observed in the cytoplasm ofthe hepatocytes. In the cecum, invasive and vegetative stages of protozoa were observed. The protozoa of invasive stages were seen intercellularly.