48 Bepurt of the Btlliarzia Mlssiun In Er/ypt, 1915 



Conclusions ^^^ Transient collections of water are quite safe 



BASED ON THE after recent contamination. 

 Eesults of (2) All permanent collections of water, such 



THE Pkesent as the Nile, canals, marshes and birkets, are 

 iNQuiKY. potentially dangerous, depending upon the pres- 

 ence of the essential intermediary host. 



(3) The removal of infected persons from a given area would 

 have no effect, at least for some months, in reducing the liability 

 to infection, as the intermediate hosts discharge infective agents 

 for a prolonged period. 



(4) Infected troops cannot reinfect themselves or spread the 

 disease directly to others. They could only convey the disease 

 to those parts of the world where a local mollusc could efficiently 

 act as carrier. 



(5) Infection actually takes place both by the mouth and 

 through the skin. Recently contaminated moist earth or water 

 is not infective. 



(6) Infection in towns is acquired from unfiltered water which 

 is still supplied, even in Cairo, in addition to filtered water, and 

 is delivered by a separate system of pipes. 



(7) Eradication can be effected without the co-operation of 

 infected individuals by destroying the molluscan intermediaries. 



