CONTAGIOUS DISEASES OF DOMESTICATED ANIMALS. 165 



Jij.pfirhnoiif) in fcediin/ the hi/evtiiif/ matter are taliulaled (ifi follows by Johne. 



Rosults. 



Horses 



Calves 



Sheep 



(loats 



Swine 



Rabbits . . . 



Dogs 



Cats - 

 Guiuea pis 

 Piireons ... 



322 



Tahlr [I'lrhuj the rexiiltn in the .same animah according to the food eaten. 



Results. 



Material fed. 



117 tubi'.rcular matter from heifer. 

 ii> raw flesh of tuberculous cows.. 



ill milk of tuberculous cows 



1 milk of tubeiculous rabbit 



LTi tubeionlar matter of man 



:;:; tubercular matter of pig 



L tiilHMcular matter of sheep 



- uibrrcular matter of rabbit 



.( tubercular matter of ape 



5 tubercular matter of birds 



Jobiie concludes — 



1. That tuberculosis can be transmitted from animal to animal and 

 from man to animal by feedin^i;" on tuberculous substances, but this 

 mode of transmission is much less certain than by inoculation. 



2. The materials which most certainly transmit tuberculosis by gastro- 

 intestinal ingestiou are tuberculous matter taken from the lungs, i)leura», 

 and lymphatic glands ; milk of tuberculous animals, as regards its cou- 

 tagious properties, must be ])laced near to tlie.se. Infection by tuberculous 

 matter taken from man is less certain than by that taken from animals. 



3. Infection is less certain from the ingestion ot muscle than by the 

 substances indicated under '2, and yet it ocouned in seventy-six cases 

 in the above named experiments. 



4. Calves, sheep, goats, and swiue i)reseut the greatest susceptibility 

 to tubercular contagion; the ])retended immunity of carnivora is not so 

 pronounced as certain authors have alleged, 



Gerlach found that of 4G animals fed raw tuberculous matter 35 be- 

 came infected ; that of 35 fed raw muscle from tuberculous subjects 8 

 becam<; infected, and that of 15 fed cooked tubercular matter 10 were 

 infected. 



