THE ANIMAL PARASITES OF MAN 



Cercaria bilharzia, Leiper, 1915. 



Pigment spots (eyes) anterior to ventral sucker absent, cuticular 

 keel on forks of tail absent. 



In Bullinus sp. and Planorbis boissyi in Egypt, (?) in Physopsis 

 africana, South Africa. Adult form, Schistosoma hamatobium. 



Cercaria bilharziella, Leiper, 1915. 



Cuticular keel on tail forks present. Pigment spots (eyes) in front 

 of ventral sucker present. 



In Planorbis boissyi and P. niareoticus, and in Melania sp. Adult 

 form (?). 



For characters of numerous other cercariae which occur in fresh 

 water molluscs see " Die Susswasserfauna Deutschlands," Max Liihe, 

 H. 17 (Gustav Fischer, Jena, 1909). 



The characters of Cercaria japonica of S. japonicnm in the mollusc 

 Katayama nosophora and of C. mansoni have still to be defined. 



Schistosoma mansoni, Sambon, 1907. 



The evidence appears to be strong that terminal-spined eggs are 

 not found in the West Indies, and that therefore the lateral-spined 

 eggs found in faeces there belong probably to S. mansoni. If this 

 be true, then the egg described by Stephens and Christophers 

 in man in India probably also belongs to another species of 

 Schistosome. 



NEMATODA. 



Ancylostomiasis. Treatment: (i) Oleum chenopodii (U.S.P,), 

 dose TIX x to in xv on a lump of sugar, three doses at two-hourly 

 intervals, preceded and followed by a purge. It is cheap, not 

 unpleasant to take, and non-toxic. Effective also against Ascaris 

 lumbricoides. 



(2) Milk of the higueron Ficus laurifolia. A spoonful in milk, 

 three times daily for three days followed by a purge. Described as a 

 harmless but very sucessfu form of treatment. 



Ground-itch. Completely cured in a few days by a 3 per cent, 

 solution of salicylic acid in ethyl alcohol. Apply for five minutes 

 twice daily. 



Ascaris lumbricoides can be kept alive for twelve days in 

 Kronecker's solution ; NaHO 0^069 grammes, normal saline 1,000 c.c. 



Eggs are laid and develop in about a fortnight at ordinary room 

 temperature. At 70 C. they are readily killed. 



