152 MILK AND THE PUBLIC HEALTH ch. vn 



bacilli ever get through these glands without producing disease in 

 them, and settle down and cause lesions elsewhere, I maintain an 

 open mind. I think it not unlikely that some cases of tuberculosis, 

 possibly of primary bone or joint tuberculosis, have this kind of 

 origin. I am quite prepared to believe that the glands are not a 

 perfectly efficient barrier to the passage of microbes, but I think 

 that the bacilli which get through them are not often numerous 

 enough to set up disease, except perhaps in a locus minoris resistentiae 

 in a constitutionally susceptible person.^ 



' For a fuller consideration of this very important subject the following 

 may, in particular, be consulted : Cobbett (in paper quoted) ; Schroeder, 

 Twenty-fifth Annual Report of the Bureau of Animal Industry (1908), pp. 138- 

 145 ; Various papers by Investigators of the Breslau School ; Zeit. f. Hygiene, 

 1908, vol. Ix. ; Sir J. McFadyean, Jo7im. Eoyal hist. Public Health, 1910, 

 xviii. p. 705. 



