﻿Commissioner 
  of 
  Agricultuee, 
  497 
  

  

  investigated 
  by 
  Bang, 
  14 
  per 
  cent, 
  were 
  found 
  infectious. 
  

   He 
  believes 
  tliat 
  milk 
  can 
  be 
  infections 
  withont 
  visible 
  disease 
  

   of 
  the 
  udder, 
  in 
  case 
  the 
  co\v 
  in 
  question 
  is 
  in 
  an 
  advanced 
  stage 
  

   of 
  tuberculosis. 
  Herschberger 
  also 
  concludes 
  from 
  his 
  investiga- 
  

   tions 
  that 
  the 
  milk 
  can 
  be 
  infected 
  "without 
  tubercular 
  disease 
  

   of 
  the 
  udder, 
  even 
  where 
  tiiere 
  is 
  but 
  little 
  disease 
  of 
  the 
  lungs. 
  

   However 
  in 
  advanced 
  generalized 
  tuberculosis 
  or 
  udder 
  tubercu- 
  

   losis, 
  the 
  infectiousness 
  of 
  the 
  milk 
  is 
  greatest. 
  

  

  Ernst 
  examined 
  114 
  samples 
  of 
  milk 
  from 
  thirty-six 
  tuber- 
  

   culous 
  cows 
  mthout 
  infected 
  udders, 
  and 
  found 
  the 
  milk 
  in- 
  

   fectious 
  in 
  28.57 
  per 
  cent. 
  In 
  50 
  per 
  cent 
  of 
  the 
  cases 
  the 
  infec- 
  

   tiousness 
  was 
  determined 
  by 
  inoculation 
  alone. 
  In 
  35.7 
  per 
  cent, 
  

   the 
  tubercle 
  bacilli 
  were 
  found 
  by 
  microscopical 
  examination. 
  

   Smith 
  & 
  Schroeder 
  examined 
  six 
  tuberculous 
  cows 
  without 
  dis- 
  

   coverable 
  udder 
  disease, 
  and 
  obtained 
  positive 
  results 
  in 
  two 
  cases, 
  

   both 
  by 
  inoculation 
  and 
  by 
  microscopical 
  examination. 
  Schroeder 
  

   also 
  examined 
  thirty-one 
  cows 
  in 
  which 
  tuberculosis 
  had 
  been 
  diag- 
  

   nosed, 
  either 
  by 
  clinical 
  examination 
  or 
  tuberculin 
  test. 
  Disease 
  

   of 
  udder 
  could 
  not 
  be 
  found 
  in 
  any 
  of 
  these 
  cases. 
  In 
  but 
  6.5 
  per 
  

   cent, 
  could 
  positive 
  inoculation 
  results 
  be 
  obtained 
  from 
  injection. 
  

   Delephine, 
  by 
  inoculation, 
  proved 
  the 
  infectiousness 
  of 
  the 
  milk 
  

   of 
  two 
  out 
  of 
  six 
  cases 
  that 
  had 
  reacted 
  to 
  tubercvilin, 
  and 
  also 
  pre- 
  

   sented 
  physical 
  evidence 
  of 
  tuberculosis. 
  In 
  both 
  these 
  cases 
  there 
  

   was 
  well-marked 
  udder 
  tuberculosis, 
  and 
  the 
  diagnosis 
  was 
  con- 
  

   firmed 
  by 
  microscopical 
  examination. 
  

  

  It 
  is 
  shown 
  by 
  the 
  above 
  experiments 
  that 
  milk 
  from 
  tubercu- 
  

   lous 
  cows 
  is 
  infectious 
  in 
  from 
  6 
  to 
  55 
  per 
  cent, 
  of 
  the 
  cited 
  cases. 
  

  

  The 
  fifteen 
  cows 
  examined 
  wath 
  tuberculin 
  and 
  reacted, 
  by 
  

   Profs. 
  Koch 
  and 
  Schueltz, 
  at 
  the 
  Veterinary 
  High 
  School 
  at 
  Ber- 
  

   lin, 
  showed 
  by 
  inoculation 
  positive 
  results 
  in 
  ten 
  cases. 
  

  

  It 
  seems 
  from 
  the 
  above 
  evidence 
  that 
  milk 
  from 
  tubercu- 
  

   lous 
  cows 
  is 
  infectious 
  and 
  dangerous. 
  Rabinowitch 
  and 
  Kempner 
  

   say: 
  " 
  We 
  are 
  justified 
  in 
  asserting 
  that 
  the 
  milk 
  from 
  cows 
  that 
  

   react 
  to 
  tuberculin 
  must 
  be 
  suspected 
  of 
  being 
  infectious 
  in 
  every 
  

  

  32 
  

  

  