DISEASES COMMUNICABLE IN MILK 



55 



TABLE 27. TUBERCULIN TESTING OF 23 Cows AT THE UNIVERSITY OF ILLINOIS 

 EXPERIMENT STATION, 1908-1910 (HAYDEN) 



T + Means reaction. 

 T Means no reaction. 

 Cond. Means condemned. 



cide can easily come into contact with the surfaces to be disinfected. 

 It is very difficult to disinfect worn and decayed woodwork; so rotten 

 floors and mangers should be torn out and burned. The earth from dirt 

 floors should be removed to a depth of at least 4 in. so as to get rid of the 

 fecal discharges it has absorbed. The next step is to apply the germicide. 

 There are many disinfectants from which to choose and in making a selec- 

 tion several points should be borne in mind, namely: (1) their efficiency, 

 (2) their non-poisonous qualities, (3) their freedom from irritating action 

 on man and beast and from odors that will cling to the building and be 

 absorbed by the milk making it unsaleable, and (4) their cost. As a rule 

 proprietary disinfectants should be avoided because if they have any value 

 at all it depends on some of the well-known germicides that costs less 

 under its own name than when masquerading under a fancy title be- 

 stowed by some manufacturer. The common disinfectants are mercuric 

 chloride or corrosive sublimate, formalin, chloride of lime or bleaching 

 powder, carbolic acid or phenol, cresol, compound solution of cresol or 

 liquor cresolis compositus, crude carbolic acid and sulphur. 



Tuberculosis in Swine. The swine in most cases contract the disease 



