256 The Philippine Journal of Science i»i8 



fluences either existing at some definite period of the life cycle 

 of the parasite or originating in the host. 



Enough has been shown effectually to despoil Trichomonas 

 and its cousins of the reputation for harmlessness to man they 

 have previously had. It remains to determine some effective 

 remedy for them. 



With this should be coupled a closer study of the bionomics 

 of the protozoa parasitic in the alimentary tract. It is only 

 through such a study that we can hope to secure the knowledge 

 of the intricate and often seemingly anomalous relations be- 

 tween these parasites and their hosts that will lead us to a 

 better understanding of their activities and that will make it 

 possible to discover the appropriate means for controlling the 

 conditions to which they give rise, from the viewpoints of both 

 cure and prevention. 



ADDENDUM 



Since the foregoing was written, several papers dealing with 

 various phases of the problem of flagellate infection of the in- 

 testine have come to hand. To deal with them would involve the 

 resetting of a considerable portion of this paper. Particularly 

 worthy of the attention of those who are interested in the subject 

 is the paper of Chalmers and Pekkola, I3 in which they discuss 

 Chilomastix mesnili and give a systematic review of the Tetrami- 

 tidse. Gabel in his paper on the pathogenic flagellates 14 gives an 

 extensive bibliography of the literature on flagellate diarrhoea. 



REFERENCES 



(1) Alexeieff, A. Kystes de Trichomonas intestinalis. Compt. rend. 



Soc. biol. (1911), 71, 296. 



(2) Barlow, Nathan. Studies on Trichomonas. New Orl. Med. & Surg. 



Journ. (1916) 69, 299. 



(3) Bowman, Fred B. Two cases of Balantidium coli infection v.-ith 



autopsy. Phil. Journ. Sci., Sec. B (1909), 4, 417. 



(4) Brumpt, E. Colite a Tetramitus mesnili (Wenyon 1910) et colite a 



Trichomonas intestinalis Leuckart 1879. Blastocystis hominis n. sp. 

 et formes voisines. Bull. Soc. path. exot. (1912), 5, 725. 



(5) Calkins, G. N. General biology of the protozoan life cycle. Am. 



Nat. (1916), 50, 257. 



(6) Castellani, Aldo. Notes on tropical diseases met in the Balcanic 



and Adriatic zones. Journ. Trop. Med. & Hyg. (1917), 20, 198. 



(7) Idem. Observations on some protozoa found in human faeces. Cen- 



tralbl. f. Bakt., Orig. (1905), 38, 67. 



(8) Chatterjee, G. C. Note on flagellate dysentery. Ind. Joui-n. Med. 



Res. (1917), 4, 393. 



13 Ann. Trop. Med. & Parasit. (1918), 11, 213. 

 "Arch. f. Protistenk. (1914), 34, 1. 



