96 



THE TRICHOMONADS 



Pathogenesis : Non- pathogenic. 



Remarks : Simitch (1939) transmitted 

 T. eqiiibiiccalis readily from the horse to 

 the donkey and vice versa, but was unable 

 to infect cattle, sheep and goats with it. 



length of the body. The free posterior fla- 

 gellum is about half as long as the body. 

 The costa is apparently slender. The axo- 

 style is thread-like, staining black with 

 hematoxylin, and extends a considerable 

 distance beyond the body. Subcostal gran- 

 ules are absent. 



TRICHOMONAS FELISTOMAE 

 HEGNER AND RATCLIFFE, 1927 



Hosts : Cat. 



Location : Mouth. 



Geographic Distribution : United 

 States. 



Prevalence : Hegner and Ratcliffe 

 (1927) found this species in 2 out of 28 

 cats examined in Baltimore, Md. 



Morphology : The body is piriform, 

 6 to 1 1 by 3 to 4 (I with a mean of 8 by 3 ji , 

 and has 4 anterior flagella longer than 

 body. The costa is illustrated as promi- 

 nent. The undulating membrane extends 

 most of the body length. There is a free 

 posterior flagellum. The axostyle extends 

 a considerable distance beyond the body. 



Pathogenesis: Non-pathogenic. 



TRICHOMONAS CANISTOMAE 

 HEGNER AND RATCLIFFE, 1927 



Pathogenesis : Non- pathogenic. 



Remarks : An old dog with advanced 

 gingivitis was infected with T. leiiax by 

 Hinshaw (1928); the infection was still 

 present 14^ months later. Simitch and 

 Kostitch (1938) were unable to infect hu- 

 mans with T. caiiistoDiae or to infect dogs 

 with T. tenax. The morphological differ- 

 ence described between the two species 

 indicates that they are different. T. can- 

 istomae and T. felistomae, however, may 

 well be the same; further study is needed 

 to determine this. 



TRICHOMONAS VAGINALIS 

 DONNE, 1836 



Hosts: Man. 



The golden hamster can be infected 

 intravaginally (Uhlenhuth and Schoenherr, 

 1955). Mice can be infected subcutaneously 

 (Honigberg, 1959). 



Location : Vagina, prostate gland, 

 urethra. 



Hosts : Dog. 



Location : Mouth. 



Geographic Distribution : 

 States, Europe. 



United 



Prevalence : Hegner and Ratcliffe 

 (1927a), found this species in 22 out of 23 

 dogs examined in Baltimore, Md. 



Morphology : The following descrip- 

 tion is based on Hegner and Ratcliffe 

 (1927a). The body is piriform, 7 to 12|j, 

 long and 3 to 4/i wide. Four anterior 

 flagella about as long as the body arise in 

 pairs from a large blepharoplast. The 

 undulating membrane extends almost the 



Geographic Distribution : Worldwide. 



Prevalence : T. vaginalis has been 

 reported in 2% to as high as 80 to 90% of 

 women and in 1 to 47% of men in various 

 surveys (Wenrich, 1947; Kucera, 1957; 

 Burch, Rees and Reardon, 1959). 



Morphology : The body is piriform, 

 7 to 23 by 5 to 12 ;i, and has 4 anterior 

 flagella about as long as the body. The un- 

 dulating membrane has 3 or 4 waves and 

 extends a little more than half the body 

 length. There is no free posterior flagel- 

 lum. An accessory filament is present. 

 The costa is very narrow. The parabasal 

 body is long, cylindrical, and has a para- 

 basal filament extending posteriorly from 



