﻿376 
  LEONARD 
  ROGERS. 
  

  

  readily 
  contract 
  a 
  fatal 
  form 
  of 
  surra 
  with 
  innumerable 
  

   trypanosoma 
  in 
  their 
  blood. 
  It 
  is 
  possible 
  that 
  a 
  small 
  

   amoeboid 
  stage 
  of 
  the 
  parasite 
  is 
  the 
  infective 
  agent 
  in 
  such 
  

   cases, 
  and 
  that 
  in 
  a 
  similar 
  way 
  the 
  infection 
  of 
  cachexial 
  

   fever 
  may 
  be 
  due 
  to 
  some 
  such 
  form 
  carried 
  from 
  one 
  person 
  

   to 
  another 
  by 
  the 
  bites 
  of 
  flies 
  and 
  mosquitoes. 
  The 
  fact, 
  

   which 
  I 
  pointed 
  out 
  some 
  years 
  ago 
  in 
  the 
  case 
  of 
  kala-azar, 
  

   that 
  the 
  infection 
  is 
  very 
  lai'gely 
  a 
  house 
  one 
  and 
  always 
  

   extremely 
  localised 
  (the 
  movement 
  of 
  healthy 
  people 
  from 
  an 
  

   infected 
  line 
  to 
  a 
  new 
  site 
  half 
  a 
  mile 
  or 
  so 
  away 
  which 
  I 
  

   recommended 
  having 
  proved 
  successful 
  in 
  preventing 
  the 
  

   spread 
  of 
  the 
  disease), 
  is 
  in 
  favour 
  of 
  such 
  a 
  mode 
  of 
  in- 
  

   fection. 
  

  

  It 
  is 
  also 
  worthy 
  of 
  note 
  that 
  the 
  plasmodial 
  form 
  of 
  T. 
  

   B 
  r 
  u 
  c 
  i 
  i 
  described 
  by 
  Hose 
  Bradford 
  and 
  Plimmer 
  very 
  closely 
  

   resembles 
  the 
  parasites 
  found 
  in 
  the 
  spleen 
  oP 
  these 
  chronic 
  

   fevers 
  in 
  man 
  and 
  the 
  small 
  multiple 
  forms 
  in 
  my 
  tubes; 
  so 
  

   that 
  in 
  this 
  disease 
  I 
  have 
  now 
  obtained 
  in 
  cultures 
  the 
  

   plasmodial, 
  amoeboid, 
  and 
  flagellated 
  forms 
  found 
  by 
  those 
  

   authors 
  in 
  a 
  variety 
  of 
  animals 
  after 
  long 
  study 
  of 
  the 
  disease 
  

   produced 
  by 
  the 
  T. 
  Brucii 
  ; 
  a 
  fact 
  which 
  can 
  leave 
  but 
  little 
  

   room 
  for 
  doubt 
  that 
  the 
  human 
  parasite 
  belongs 
  to 
  the 
  

   trypanosomes. 
  Successful 
  inoculation 
  experiments 
  are 
  still 
  

   wanting 
  to 
  prove 
  this, 
  all 
  the 
  animals 
  I 
  have 
  tested 
  — 
  including 
  

   tank 
  fish 
  (which 
  are 
  commonly 
  infected 
  with 
  a 
  sluggish, 
  

   much 
  curved, 
  double 
  S-shaped 
  trypanosome) 
  having 
  proved 
  

   insusceptible 
  even 
  when 
  injected 
  with 
  cultures 
  containing 
  the 
  

   large 
  flagellated 
  form 
  of 
  the 
  parasite 
  ; 
  but 
  further 
  work 
  based 
  

   on 
  the 
  knowledge 
  of 
  the 
  true 
  nature 
  of 
  the 
  organism 
  now 
  

   available 
  should 
  lead 
  in 
  time 
  to 
  further 
  elucidation 
  of 
  a 
  disease 
  

   which 
  is 
  certainly 
  second 
  to 
  none 
  in 
  the 
  frequency 
  and 
  

   seriousness 
  of 
  the 
  illness 
  it 
  produces 
  in 
  many 
  parts 
  of 
  India, 
  

   and 
  also 
  appears 
  to 
  be 
  widely 
  distributed 
  in 
  other 
  countries. 
  

  

  