452 



FOODS 



Prominent, however, above everything else stands out 

 the fact that cleanliness is the great protector of health. 

 Those communities that have well-built sewers, clean streets, 

 clean milk, and clean water are healthy. The community 

 through its boards of health must protect the individual 

 from the germs of contagious and infectious diseases, for 

 he cannot do this by himself. Persons that eat pure food, 

 drink pure water, breathe pure air, and keep their bodies 

 pure are usually healthy. 



The Americans were able to build the Panama Canal 

 because they were able to protect the workmen from disease 

 germs. Disease had defeated previous attempts. They 

 were able to make Havana, Cuba, a healthy and healthful 

 city although for years it had been one of the plague 



spots of the world 

 - by cleaning it up 

 and destroying the 

 breeding places of 

 disease germs. 



Animal Life that 

 Causes or Spreads 

 Disease. Certain 

 low forms of animal 

 life, the protozoa, 

 have already been 

 mentioned as disease producers. Unlike bacteria, the pro- 

 tozoa do not cause disease by passing directly from one 

 person to another. Instead, they need to live in some insect 

 between whiles. In malaria and yellow fever the insect 

 in which they live is the mosquito, and in the sleeping sick- 

 ness they live in a fly called the tsetse. If a mosquito of 



A DISEASE-BEARING MOSQUITO 

 The mosquito is greatly magnified. 



