176 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



We traced thirty-three infected herds to just that sHp-up in not 

 sterihzing the milk. In two days we had the disease spread to 

 twenty-one herds in Holland from skimmed milk. Tuberculosis 

 is another disease spread that way, and it shows the imperative 

 necessity of every state having adequate laws regarding the ster- 

 ilization of milk before it is returned- to the farmers for use in 

 the herds and for their own food. Disease may develop sud- 

 denly, and it is better to have^ your guard up all the time. 



j\Ir. Gilkerson : To what degree is it necessary to heat that 

 milk to make it safe? 



Dr. Houck : One hundred and forty degrees for thirty 

 minutes, but I would rather have a higher temperature, say i8o 

 degrees to 190 degrees for ten minutes. If they bring it up to 

 180 and put it in the cans, the heat will hold for some time, mak- 

 ing the sterilization of the product doubly sure. 



Mr. Gilkerson : They have shut off our skim milk supply 

 entirely and stopped any danger. 



Mr. Mason : In every case in our neighborhood they are 

 isolated cases. One neighbor would get it, and might have a 

 neighbor within forty rods and in every case none of the neigh- 

 bors have had it. 



Dr. Houck : We had seventy of those isolated cases in 

 Michigan and Indiana, and in most cases the disease did not 

 spread to the neighbors. 



Mr. : Are we getting on top of the disease in Illi- 

 nois ? 



Dr. Houck : We had less than 20 infected herds in the 

 whole state when that injunction went on, and we got word 

 from the Secretary to observe the state laws and the injunctions 

 of its judges. At the end of our wait we had 60. We are get- 

 ting them under the ground, and by the middle of next week 



