432 APPLIED PHYSIOLOGY 



185. Trace the origin and cause of the colds of some of the mem- 

 bers of the class. Determine which were evidently caused by exposure 

 to dampness and cold air, and which were due to breathing foul air or 

 contact with other persons who had colds. 



REVIEW TOPICS 



1. Explain why infectious diseases seem to be largely, 



due to the weather. 



2. Give some reasons why it is difficult to suppress in- 



fectious diseases entirely. 



3. What is meant by immunity f How may it be in- 



creased ? 



4. How may we increase the power of our body to resist 



the growth of disease germs ? 



5. How do vaccines and antitoxins produce immunity 



to a disease ? Discuss their use. 



6. Mention some of the means by which disease germs 



may be spread from a sick person. 



7. What is the cause of fever ? 



8. Discuss the cause and prevention of colds. 



9. Why should we consider a cold to be a dangerous 



form of sickness ? 



10. How may we recognize that a person has diphtheria? 



How can we prevent the disease ? 



1 1. How may we prevent pneumonia ? 



12. How may we prevent erysipelas ? 



13. Discuss the advisability of quarantining every case of 



whooping cough, measles, mumps, and chicken pox. 



14. What are some of the usual causes of intestinal 



diseases ? 



15. What methods should be taken to prevent the spread 



of scarlet fever, diphtheria, and smallpox ? 



1 6. Discuss the cause and prevention of lockjaw ; of rabies ; 



of hook-worm disease. 



