III.— EXPERIMENTAL TUBERCULOSIS IN THE GOAT. 

 By MM. Cadiot, Gilbert, and Roger. 



Not all mammals are equally prone to contract tuberculosis, and 

 it has been suggested that the goat and dog are almost completely 

 refractory. Cases and experiments published during the last few years 

 have, however, shown, contrary to formerly held opinion, that the dog 

 has no particular immunity, and we believe the same is true of the 

 goat. 



Cases of spontaneous tuberculosis — that is to say, tuberculosis 

 occurring apart from experimental inoculation — are, it is true, rare, 

 but this is partly due to the small number of goats which are kept, 

 to the little attention which has as yet been given to their diseases, 

 and to the conditions under which they live. We know, in point of 

 fact, that goats usually live in the open air : in poor countries they 

 seldom leave the hills ; under other circumstances they are kept in 

 special sheds, and are therefore little exposed to contagion. Now 

 the majority of reported cases refer to animals which lived in stables 

 with cows or horses. 



In 1 871 Carsten Harms published the history of a goat which had 

 been ill for six months, and on the post-uioiiciii examination of which 

 he found tubercles and cavernous spaces in the lungs. Gerlach 

 published a similar case. Lydtin and Motz reported five others. 



In a case mentioned by Sluys, Korevaar, and Thomassen, infection 

 appeared due to the use of milk from a tuberculous cow; the lesions 

 seen on autopsy were extremely extensive ; they affected the intestine, 

 mesenteric glands, liver, spleen, kidneys, and lungs. We may also 

 refer to Konig's case, where the mesenteric glands, liver, and lungs 

 were affected, and d' Alston's, in which tul^ercles were discovered in 

 the lungs and bronchial glands. 



This problem has been taken up by experimental pathologists, and 

 a certain number of instructive cases related. The goat proves to be 

 no more refractory to infection by the digestive tract than other 



