BY THE HON. A. NORTON. 115 



human subject two tuberculous diseases occur, one of these being 

 the true pathological equivalent of bovine tuberculosis, bearing 

 to it the same relation? which human ' glanders ' bears to equine." 

 And in a footnote he adds, referring to Koch's discoveries — 

 " Organisms have been found similarly in Perlsucht of the ox, 

 so the question arises as to whether the organism in man differs 

 from that found in the ox. The strongest evidence seems to be 

 in favour of their identity, but the question is still sub judke 

 The following report is interesting in this relation : Sutton con- 

 siders Perlsucht distinct from human tuberculosis, its variations 

 and ultimate effects being very different from those seen in man. 

 Klein has shown that the bacilli in the bovine form differ mor- 

 phologically and in their distribution from Koch's bacillus. 

 Heneage Gibbes inclines to the same view." 



1 will now make a further quotation from Woodhead, wlio, 

 after referring to some experiments made by Nocard and Roux, 

 continues : — "It is possible, therefore, that the higher tempera- 

 ture that is met with in cattle along with other conditions 

 there present may have a distinct effect in diminishing the 

 virulence of the organism, whilst at the same time it may play 

 an important role in causing its parasitic and vegetative activity 

 to be increased within the body of these animals, though this is 

 not necessarily accompanied by increased vegetative activity 

 outside the body. As Koch pointed out at the International 

 Medical Congress, of 1890, the tubercle culture from fowls were 

 quite distinct and could not be passed on as such from animals 

 to animals of different species or by growth at different 

 temperatures, and he concludes that although nearly related 

 to the ordinary tubercle bacillus |they are specifically distinct.'* 

 Notwithstanding this statement by the greatest German 

 authority, we must not jump to the conclusion that fowls 

 stand in no danger of contracting the disease from man. 

 The contrary, indeed, has been proved to be the case. I must 

 once more turn to Woodhead for information. " That the 

 sputum contained the elements which were the existing causal 

 agents of the disease had been experimentally proved, even before 

 the actual discovery of the bacillus was made, and dogs, which 

 had been in the habit of taking up the sputum of tuberculous 

 persons, had been known to contract tlie disease, an observation 



