VIII CONTENTS. 



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 



Rop3' milk ; 30 



Cause of ropj' milk 31 



Biological characteristics of B. lacHs viscosus 32 



Sources of contamination of milk . . 32 



Means of combating ropy milk 33 



Germicidal activity -. 34 



References 38 



CHAPTER III. 



EPIDEMIC DI,SEA,SE.S TRAN.SMITTED BY M1I<K. 



Tran.smission of diseases of man by 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-intestinal infections .55 



References 55 



CHAPTER IV. 



HOVINE TlIBERCUI.,0,SI,S AND OTHER CATTI.E DKEA.SES. 



Bovine tuberculosis 59 



Losses to the live stock industrv . . , 59 



Tran.smi.s-sion bj- milk 59 



Infection of swine 



Insidious onset 



Conditions governing prevalence 



Prevalence in herds gj^ 



Contamination of milk by tubercle bacilli ... 62 



Tubercle bacilli in market milk 53 



Human and bovine types of tubercle bacilli 63 



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