﻿Commissioner 
  of 
  Agriculture. 
  495 
  

  

  During 
  the 
  summer, 
  there 
  has 
  been 
  a 
  statement 
  made 
  bj 
  a 
  veteri- 
  

   narian 
  that 
  bovine 
  tuberculosis 
  is 
  not 
  commimicable 
  to 
  man. 
  

  

  Crookshank, 
  in 
  his 
  text-book 
  of 
  bacteriology, 
  states 
  the 
  following: 
  

  

  " 
  The 
  bacilli 
  in 
  tissue 
  sections 
  of 
  bovine 
  tuberculosis 
  are 
  shorter 
  

   and 
  less 
  granular 
  than 
  those 
  in 
  human 
  tubercular 
  sputum, 
  but 
  in 
  

   milk 
  they 
  are 
  quite 
  as 
  long, 
  and 
  even 
  longer, 
  and 
  very 
  distinctly 
  

   granular 
  or 
  beaded, 
  and 
  are 
  thus 
  brought 
  much 
  closer, 
  morpho- 
  

   logically, 
  to 
  the 
  bacilli 
  in 
  human 
  sputum. 
  Speaking 
  generally, 
  

   however, 
  the 
  average 
  length 
  of 
  the 
  human 
  bacilli 
  is 
  greater 
  t^^"^ 
  the 
  

   average 
  length 
  of 
  the 
  bacilli 
  in 
  cows' 
  milk, 
  but 
  the 
  longest 
  of 
  the 
  

   bovine 
  bacilli 
  cannot 
  be 
  distinguished 
  in 
  length 
  from 
  the 
  longest 
  

   human 
  bacilli. 
  There 
  are, 
  however, 
  exceptional 
  cases, 
  for 
  in 
  some 
  

   preparations 
  of 
  pus 
  from 
  human 
  beings 
  the 
  bacilli 
  is 
  remarkable, 
  

   not 
  only 
  for 
  their 
  thinness, 
  and 
  their 
  unifoinnly 
  beaded 
  character, 
  

   but 
  more 
  particularly 
  for 
  their 
  extraordinary^ 
  length. 
  They 
  should 
  

   be 
  compared 
  with 
  other 
  preparations, 
  in 
  which 
  the 
  bacilli, 
  though 
  

   in 
  human 
  sputum, 
  are 
  sometimes 
  much 
  more 
  distinctly 
  rod-shaped, 
  

   much 
  shorter 
  and 
  thicker, 
  with 
  complete 
  absence 
  of 
  any 
  beaded 
  

   appearance. 
  j^either 
  length 
  nor 
  granularity 
  is 
  a 
  characteristic 
  

   sufficient 
  to 
  denote 
  any 
  specific 
  difference 
  between 
  human 
  and 
  

   bovine 
  bacilli." 
  

  

  Friedberger 
  & 
  Frohner, 
  in 
  their 
  veterinar^^ 
  pathology, 
  say: 
  

   ** 
  The 
  tubercular 
  matter 
  of 
  animals 
  w^as 
  found 
  to 
  possess 
  the 
  greater 
  

   power 
  of 
  infection; 
  then 
  came 
  the 
  sputum 
  of 
  tuberculous 
  men 
  and 
  

   the 
  milk 
  of 
  tuberculous 
  animals, 
  and, 
  lastly, 
  tuberculous 
  flesh. 
  The 
  

   identity 
  of 
  tuberculosis 
  of 
  cattle 
  with 
  that 
  of 
  men 
  has 
  been 
  proved 
  

   by 
  numerous 
  positive 
  transmission 
  experiments." 
  

  

  Sternberg 
  also 
  says: 
  "A 
  more 
  common 
  mode 
  of 
  infection, 
  

   especially 
  in 
  children, 
  is 
  probably 
  by 
  the 
  way 
  of 
  the 
  intestinal 
  

   glands, 
  from 
  the 
  ingestion 
  of 
  the 
  milk 
  of 
  tuberculous 
  cows. 
  

   That 
  infection 
  may 
  occur 
  by 
  way 
  of 
  the 
  intestines 
  has 
  been 
  

   proved 
  by 
  experiments 
  upon 
  rabbits, 
  which 
  develop 
  tuber- 
  

   culosis 
  when 
  fed 
  upon 
  tuberculous 
  sputum. 
  And 
  that 
  the 
  

   tubercle 
  bacillus 
  is 
  frequently, 
  if 
  not 
  usually, 
  present 
  in 
  the 
  

  

  