CONTENTS. 
Page. 
Introduction 9 
Acknowledgments 13 
Summary and recommendations 14 
I. Epidemiology 37 
Circular letter 39 
Typhoid fever case card 40 
Sex 41 
Race 42 
Age 43 
Imported cases 43 
Prevalence 44 
Tables of cases 45 
Sanitary condition of residences 46 
Disposal of sewage 47 
Screens 47 
Insects and vermin 47 
Domestic animals on premises 49 
Fruits and vegetables 49 
Shellfish and fresh-water fish 50 
Water 50 
Soda water 52 
Occupation 52 
Infection by contact 53 
Prophylaxis 55 
Summary 57 
II. Milk and other dairy products 59 
Introduction 61 
Milk and tj'phoid fever 62 
Inspection of city dairies 65 
Examination of milk furnished the District of Columbia 69 
Obtaining samples 70 
Temperature 70 
Dirty milk 71 
The number of bacteria in milk 71 
The kind of bacteria found in milk 72 
Fermentation in samples of milk purchased in Washington 73 
Examination of milk found on the market in the District of Columbia, 
August and September, 1906 74 
A review of the literature upon the bacteriology of milk 80 
Summary of the milk problem 20 
Recommendations 20 
III. Ice 87 
Ice and typhoid fever 89 
Inspection of the ice factories 93 
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