608 



FAMILY: BODONID^ 



a round or ovoid body, a nucleus, and two flagella. It seems quite possible 

 that it is actually a species of Bodo, but more than this cannot be stated. 

 Knowles and Das Gupta (1924) have seen a species of Bodo in the 

 saliva from the human mouth. It was seen on three occasions between 

 August 18 and October 27. Knowles, Napier, and Smith (1924) record 

 the occurrence of a flagellate belonging to this genus in the rectum of the 

 sand fly, Phlebotomus minutus, in India. To Alexeieff (1910fl) is due the 

 credit of first pointing out that the flagellates described as Protvazelxia did 

 not differ structurally from those of the genus Bodo. 



Bodo caudatus (Dujardin, 1841) — The synonymy of this species is given by 

 Dobell and O'Connor (1921) as follows: Amjihimonas caudata Dujardin, 1841; Bodo 



urinarius Hassall, 1859 ; Diplomastix 

 caudata Kent, 1881 ; B. asiaticus Castellani 

 and Chalmers, 1910; Prowazelcia cruzi 

 Hartmann and Cliagas, 1910; P. weinbergi 

 Mathis and Leger, 1910 ; P. asiatica 

 (Castellani and Chalmers) Whitraore, 

 1911; P. javanensis Flu, 1912; P. urinaria 

 (Hassall) Siuton, 1912; P. i/r/ZiCrt Sangiorgi 

 and Ugdulena, 1916; and with these must 

 be included B. stercoralis Porter, 1918, 

 and P. ninoe IcoM-yaTcimoviYaiMmoff, 1916. 



It is probable that B. caudatus 

 is the commonest coprozoic flagellate 

 to appear in human fseces. It is in 

 no sense an inhabitant of the human 

 intestine, but develops in fseces after 

 they have left the body, and can 

 often be obtained by inoculating 

 fseces on to agar plates. 



The forms which develop in decom- 

 posing urine, as described by Hassall 

 (1859)andSinton (1912), are probably 

 the same species (Fig. 249). Accord- 

 ing to Klebs (1892), the flagellates 

 vary in length from 11 to 19 microns, 

 It may be long and slender or more 

 or less rounded. The posterior end of the body is pointed and the body 

 is somewhat flattened. At one side of the anterior extremity is the 

 mouth, which may be considered to be on the ventral surface. Dorsal to 

 the mouth is a small contractile vacuole, near which is the kinetoplast, 

 a structure made up of a deeply staining parabasal and two blepharo- 

 plasts, each of which gives origin to an axoneme which passes to the 

 surface of the anterior end of the body to form a flagellum. There is a 



*i' S 



Fig. 249. — Bodo caudatus from Human 

 TJpaNE (x 1,650). (After Sinton, 

 1912.) 



1-2. Two types of flagellate. 



3. Encysted form. 

 4-5. Emergence of flagellate from cyst. 



but the shape of the body varies. 



