IMPORTANCE TO MEAT INSPECTION 145 



If one half of the udder is condemned because of an 

 udder-infection the other half must be critically inspected. 

 It may only be passed when it is manifestly free from 

 pathological lesions and when the udder-infection found in 

 the first half is plainly of a local character (see later). 

 [Entire udder is condemned.] 



Meat. — Only the infectious inflammations of the udder 

 can render the meat unfit for man. 



Acute udder-infections are usually local in character. 

 They are milk-infections and wound-infections. The 

 former are the most important and the location of the 

 organisms is in the tubuli, as is the case in the more virulent 

 staphylomycosis with diffuse necrosis of the udder. 



Infection of the blood or bactereemia rarely occurs. It 

 may be recognized by swelling of the spleen, hsemolysis, or 

 by acute embolic pneumonia. A microscopic examination 

 of the spleen or blood must determine the judgment of the 

 meat. If Gram negative rod-shaped bacteria or Gram 

 positive cocci are found the meat is condemned. [Micro- 

 scopic examination is not necessary. Carcass is condemned 

 on gross lesions of bacter^emia.] 



An udder-colibacillosis may cause infection of the meat. 

 This infection is especially difficult to determine. If an 

 acute udder-infection is established and if the cut surface 

 of the udder is severely reddened, a microscopic examina- 

 tion of the juice from the incision in the udder must 

 determine whether or not the meat is fit for food. If a 

 considerable number of fairly large, short and clumpy Gram 

 negative bacilli with rounded ends are found the meat is 

 declared unfit for use by man. [If local the entire udder 

 is condemned. If acute diffused mastitis the entire carcass 

 is condemned. B. A. I. Order 150, Regulation 13, Section 

 18, d.] 



If an acute udder-infection is complicated with gan- 

 grene the meat may only be used after we have proved that 



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