206 THE ANIMAL PARASITES OF MAN 



[Nyctotherus] africanus, Castellani, 1905. 



In the freces of a native of Uganda who suffered from sleeping 

 sickness and diarrhoea and had in his intestine Ascaris liunbricoitlcs, 

 Trichocephdlus tricli hints and Ancvlostoiini diiodciuile, Castellani found 

 a curiously shaped Infusorian, 40 /x to 50 //, long, and 35 //, to 40 /x 

 broad, with spherical macro- and micronucleus and a contractile 

 vacuole (fig. 118). He included the organism in the genus Xyctotlicnis, 

 perhaps wrongly, or the parasite may have been deformed. After the 

 patient's death the same parasite was found in the intestine and 

 especially in the caecum. 



FIG. iiJ.Nycto- FIG. \\%. Nyctotherus 



thenis giganleus. africanus. (After Castel- 



(After Kiause.) lani.) 



G. Lindner, in Cassel, studied certain peritrichal Infusoria (stalkless Vorticella), 

 and connected them, probably incorrectly, with the most varied diseases of man and 

 domestic animals, even with Sarcosporidia of pigs. It may be mentioned that 

 according to a communication by letter from Schaudinn, Vorticella may be found 

 in freshly evacuated faeces, but always only after the administration of a water 

 enema. In spite of this, several other investigators mention Vorticellae as 

 intestinal parasites of man. 



The Chilodon dentatus (Ehrenberg) recorded in 1903 by J. Guiart as a parasite 

 of man, which may be found in all infusions, can hardly have lived in the man 

 from whose faeces it was cultivated, but may represent a chance admixture both in 

 the faeces and the cultivations. C. uncinatus was also found as a chance parasite 

 of man by Manson and Sambon. According to Doflein 1 (1911) certain Chilodon- 

 like organisms have been found by Selenew in prostate secretions in gonorrhoea. 

 Other species of the genus Chilodon are known, but only as ectoparasites (e.g., 

 Chilodon cyprini, Moroff, 1902, from the skin and gills of diseased carp). 



A number of other parasitic Ciliates are known, among which Ichthyophthirius 

 multifiliis, destructive to fish, is important. It lives in the skin and the layers 

 immediately below it, forming small whitish pustules which may become confluent. 



1 Lekrbuch der Protozoenkunde, 3rd ed,, p. 963. 



