258 THE BIOLOGY OF DISEASE 



paupers at a cost of over one hundred million dollars per 

 year." — Davenport. 



SUMMARY 



Disease prevents us from working as we do when we 

 are well. Most diseases are unnecessary and preventable, 

 especially all which are caused by some plant or animal liv- 

 ing as a parasite in our bodies. In most of the biological 

 diseases some definite poison produced by the parasite is 

 taken into the body, and this is the chief cause of the disease. 

 As a physician knows the nature of a disease and its effect 

 upon the body, he can aid materially in overcoming the 

 illness. Each biological disease is distinct and must 

 have special treatment. Many of these diseases are taken 

 from some one who has the disease. Vaccination, quaran- 

 tine, and disinfection are measures which help to prevent 

 the spread of germ diseases. It is our duty to keep well, 

 and we can do much toward this by understanding how 

 to avoid the biological diseases. 



QUESTIONS 



What are the biological diseases ? How many biological diseases do 

 you know ? Name them. Describe a germ disease. Describe malaria. 

 What is vaccination ? What is quarantine ? For what diseases are 

 people quarantined ? What is the work of the Board of Health ? What 

 is the purpose of disinfection ? What are the chief disinfectants ? 



REFERENCES 

 Celli-Eyre, Malaria. 



Chalmers, The Beloved Physician Edward L. Trudeau. 

 Chapin, Sources and Modes of Infection. 

 Conn, Bacteria in Milk. 



Cornell, Health and Medical Inspection of School Children. 

 Edelman, Mehler & Eichorn, Meat Inspection. 

 Knoff, Tuberculosis, A Preventable and Curable Disease. 

 Rosenau, Disinfection and Disinfectants. 

 Stiles, Prevalence and Geographical Distribution of Hookworm Disease 



Hygienic Laboratory, Bulletin Number 10, Washington. 

 Trudeau, Edward L., An Autobiography. 



