VIII CONTEXTS. 



Lactic acid fermentation 26 



Putrefactive processes 29 



Organisms causing putrefaction .... 29 



Antagonism of lactic acid fermentation 29 



Conditions controlling putrefaction 29 



Source of putrefactive organisms 30 



Toxic milk ... 30 



Ropy milk ... 30 



Cause of ropy milk 31 



Biological characteristics of //. I act is I'isrostts.... 32 



Sources of contamination of milk 32 



Means of combating ropy milk ...... 33 



Germicidal activity 34 



References ... . 38 



CHAPTKR III. 



EPIDEMIC DISKASKS TRANSMITTED BY MII y K. 



Transmission of diseases of man bv milk 41 



Character of milk-borne epidemics 41 



Typhoid fever 42 



Investigations in the District of Columbia.. 42 



Importance of milk as a carrier 43 



Sources of the contamination of milk 45 



Detection of milk-borne typhoid fever epidemics 46 



Berkeley, Cal., outbreak 49 



Diphtheria . 51 



Recognition of milk-borne diphtheria epidemics 52 



Milk-borne diphtheria in Oroville, Cal. 53 



Scarlet fever 54 



Gastro-intestiiial infections 55 



References . 56 



CHAPTKR IV. 



BOYINK TrBERCn.OSIS AND OTHER CATTLE DISEASES. 



Bovine tuberculosis 59 



Losses to the live stock industry 59 



Transmission by milk 59 



Infection of swine 60 



Insidious onset 60 



Conditions governing prevalence 60 



Prevalence in herds 61 



Contamination of milk by tubercle bacilli .. 62 



Tubercle bacilli in market milk bt 



Human and bovine tvpes of tubercle bacilli ... 63 



