Synonyms: Trichomonas eberthi.
Hosts: Chicken, turkey. Kotlan (1923) reported T. eberthi from the duck.
Geographic Distribution: Worldwide.
Prevalence: Common. McDowell (1953) found T. eberthi in 35% of a large number of chickens in Pennsylvania.
Morphology: The body is carrot-shaped, 8 to 14 by 4 to 7 u, with vacuolated cytoplasm, and 3 anterior flagella. The undulating membrane is prominent, extending the full length of the body. The posterior flagellum extends about half of the body length beyond the undulating membrane. An accessory filament is present. The cytostome is difficult to demonstrate. The blepharoplast is composed of 4 equidistant granules, but tends to stain as a single body. Five to 12 or more subcostal granules are present. The axostyle is massive, hyaline, with its anterior end broadened to form a capitulum which contains siderophilic, argentophilic granules. Other endoaxostylar granules are also present. A ring of chromatic granules surrounds the axostyle at its point of emergence from the body. The parabasal body is shaped like a flattened rod, sometimes lumpy, of variable length. There are 5 chromosomes.
Cultivation: Diamond (1957) cultivated T. eberthi axenically for the first time in Diamond’s medium.
This species was isolated once from human feces by Cleveland (1928). It has 3 very long flagella, a heavy undulating membrane, a long, coarse axostyle and a costa with 2 rows of granules. Like T. buttreyi and the form cultured from a calf by Diamond (1957), it resembles T. batrachorum. The relationship between the small trichomonads of mammals requires study.