TRICHINA, HOOKWORMS, FILARIA, ETC. 83 



circumstances, more subject to attack than adults because 

 they go barefoot more, but adults are in no wise immune, and 

 in mining regions men may furnish the highest percentage of 

 infection because conditions in the mines are favorable for the 

 development of the parasite. 



Epsom salts followed by thymol and then by epsom salts 

 again will remove the worms from the body of the host, but 

 reinfection may again take place unless sanitary measures are 

 adopted to control the spread of the pest. Where the modern 

 sewage facilities are found no hookworms occur, and the great 

 fight that is being made against this, the worst curse of the 

 poorer classes of the south, is made against the unsanitary 



FIG. 28. Section through the skin of a dog two hours after it has 

 been infected with the Old World hookworm. (Greatly enlarged; after 

 Wilder.) 



conditions that exist in many regions. If the soil is not 

 polluted with the feces that contain the eggs of the parasite 

 the disease will not spread. 



Not only do. the hookworms directly cause many deaths 

 each year, but they lower the vitality of the victims so that 

 they become an easy prey to other diseases. In addition 

 they retard their physical and intellectual development, seri- 

 ously affect the working capacity and in many other ways 



