CHAPTER 13 



The Air We Breathe 



GENERAL CONSIDERATIONS 



AIR POLLUTION AND HEALTH 



QUALITATIVE TECHNICS FOR MICROBIOLOGICAL AIR ANALYSIS 



QUANTITATIVE AIR ANALYSIS 



AIR AS A VEHICLE FOR DISEASE TRANSMISSION 



PHYSICAL AND CHEMICAL FACTORS AFFECTING AIR AND 



HUMAN HEALTH 

 Ultra-violet lamps 

 Air conditioning- 

 Air treatment devices 

 Odors and health 



RAISING MICROBE-FREE ANIMALS 



GENERAL CONSIDERATIONS 



Without delving too deeply into the field of physiology, it might 

 be of interest to quote a few figures relative to the bulk of air 

 inhaled each day by human beings. Since air carries microorgan- 

 isms, the volume of air inspired will directly influence the number 

 of organisms inhaled. 



A quiet inspiration is usually found to average about 500 c.c. 

 (30 cubic inches), but lung capacities vary tremendously among 



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