THE TRICHOMONADS 



93 



Cultivation : T. rotunda grows read- 

 ily on primary culture in standard tricho- 

 monad media, but dies out on subculture 

 and can no longer be found after the 4th or 

 5th subculture. However, it can be main- 

 tained indefinitely in a cecal extract- 

 serum medium provided that Pseudonionas 

 aeruginosa is present (Hibler et al. , 1960). 



TRITRICHOMONAS ENTERIS 

 (CHRISTL, 1954) nov. comb. 



Synonym : Trichomonas enteris 

 Christl, 1954. 



Hosts : Ox, zebu. 



Location : Cecum, colon. 



Geographic Distribution : Germany, 

 India, probably worldwide. 



Prevalence : Common in Bavaria, 

 according to Christl (1954). 



Morphology : The body is 6 to 12jLi 

 long and 5 to 6fi wide. Three anterior 

 flagella of equal length arise from a single 

 blepharoplast. The flagellum at the edge 

 of the undulating membrane is single, 

 without an accessory filament. The un- 

 dulating membrane extends 3/4 of the body 

 length, and a free flagellum extends be- 



Fig. 9. 



Tritrichomonas enteris. X 1950. 

 (From Christl, 1954 in Zeitschrift 

 fiiy ParasitenkiDide, published by 

 Springer- Verlag). 



yond the undulating membrane. The axo- 

 style is straight, slender, bent like a 

 spoon around nucleus, and extends at the 

 most 1/4 of the body length beyond the 

 body. Subcostal granules are present. 



TRITRICHOMONAS SP. 



Host: Ox. 



Location : Feces. 



Geographic Distribution : North 

 America (Maryland). 



Morphology : Diamond (1957) culti- 

 vated this form from calf feces. He did 

 not describe it except to say that it resem- 

 bled T. batrachorum. 



TRITRICHOMONAS EQUI 

 (FANTHAM, 1921) 



Synonyms : Trichomonas equi. 



Host: Horse. 



Location : Cecum, colon. 



Geographic Distribution : Presum- 

 ably worldwide, altho it has been reported 

 specifically only from South Africa and 

 the U.S. (Iowa). 



Prevalence : Fantham (1921) found 

 T. equi very rarely and in very small num- 

 bers in horses in South Africa. Hsiung 

 (1930) found it on several occasions in 

 Iowa. 



Morphology : According to Hsiung 

 (1930), T. equi measures about 11 by 6fx 

 and seems to possess 3 anterior flagella 

 and an undulating membrane. The axo- 

 style is slender. 



TRITRICHOMONAS FECALIS 

 CLEVELAND, 1928 



This species was isolated once from 

 human feces by Cleveland (1928). It has 

 3 very long flagella, a heavy undulating 



