Protection Against Disease 



459 



rest and sleep, and freedom from all care and worry, are also 

 necessary. 



If possible the patient should go to a place of high altitude 

 where the air is pure, cold and dry. In cities, sleeping porches 

 and roof tents are often used with excellent results, because of 

 purer air than in the house. . 



Typhoid Fever. Since 

 the germs of typhoid fever 

 are largely spread in the ex- 

 cretions of its victims, it is 

 often spoken of as a "filth" 

 disease. It is spread by excre- 

 tions which are thrown on the 

 soil, from which the germs 

 may find their way onto green 

 vegetables, or into wells of 

 drinking water, or other bodies 

 of water from which people 

 derive their daily water sup- 

 ply. 



Typhoid is also spread by 

 means of milk that has been 

 polluted through the carelessness of unclean milkers, or of venders 

 who have washed their cans in water that was polluted. Oysters 

 grown in water that has received typhoid excretions are another 

 cause of infection, if eaten raw. 



It is a well established fact that the common house fly, after 

 feeding on excretions, carries the germs on its feet and deposits 

 them on the food we eat. This fact is so fully ^accepted that 

 the insect is now called the typhoid fly. 



It occasionally happens that the source of the disease is a 

 person who has apparently recovered from an attack, but in whose 

 system, sometimes in the saliva, the germs still develop. Such 

 an individual is called a typhoid carrier. 



Diphtheria. Diphtheria is carried from person to person 

 by sputum and by objects that are brought into touch with the 

 infected parts. Hence it may be spread by dust that happens to 



Publishers' Photo Service. 



THE HOUSE FLY, A SPREADER OF 

 DISEASE GERMS 



Notice the long hairs on the fly's legs and 



body. These hairs become covered with 



filth and disease germs, which the fly 



carries and spreads about. 



