- 24 - 



hern, coincide also in the opinion that 

 contagion is generally produced by co- 

 habitation only. 



There are two other essential causes 

 which contribute to increase the grade 

 of natural immunity of the Argentine 

 cattle, in the first place the resistance i f 

 the native country. hred cattle to contract 

 tuberculosis, and the early age at which 

 the greater majority of our cattle inten- 

 ded for beef, are sent to the shambles 

 or exported. 



The first of these opinions, corrobo- 

 rated on the other hand by us, comes 

 grom foreign countries, where the erro- 

 neous beleif exists that for us the ques- 

 tion of tuberculosis in our herds, is a 

 grave problem. 



Let us hear what Walley says on the 

 subject, referring to England; 

 " The breeds of cattle offering the ^roa 

 •' test receptibility I'm- Luberculosis arc 

 " the Alderney and Shorthorn, Certain 

 '• races are especially contaminated, 



