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however,  that  dogs  will  not  infrequently  recover  from  what  is 
clinically  a  trypanosomiasis. 
We  have  notes  given  by  the  owners*  of  two  dogs  which  travelled  from  Broken 
Hill  to  Abercorn  and  which  were  healthy  on  starting.  The  only  tsetse  actually 
feen  were  encountered  about  the  middle  of  April,  and  were  noticed  to  have 
settled  on  these  dogs.  They  arrived  in  Abercorn  the  end  of  April,  and  a  or  nigh 
la'er  a  month  after  meeting  Gl.  morsitans,  both  lost  flesh,  became  listless  and 
dull '  and  had  uncertain  appetite.  This  continued  for  about  three  weeks,  after 
whkh  they  gradually  picked  up,  and  at  several  blood  and  gland  examina  ions 
between  June  and  November  no  trypanosomes  were  evei  seen,  and  e  gs  are 
both  quite  healthy.  *  •  , 
Two  other  dogs  travelled  from  Sumbu  to  Mporokoso,  and  frorn  four  to  eight 
weeks  after  the  journey  lost  all  condition,  became  veritable  skeletons,  and  vven 
covered  with  body  sores.  A  third  dog  which  accompanied  one  of  these  had  to 
be  shot.  In  one  case  there  was  total  ‘blindness’  and  opacity  of  the  cornea. 
They  commenced  to  improve  after  about  two  months’  sickness  but  regained  their 
condhion  verv  slowly.  We  e.vamiiied  their  blood  and  glands  on  seieral 
occasions  between  June  and  November  without  finding  trypanosomes,  though 
they  were  still  thin. 
As  indicating  the  course  trypanosomiasis  may  take  in  a  dog,  we 
may  here  mention  the  case  of  a  wire-haired  fox  terrier  which  accom¬ 
panied  one  of  us  from  Broken  Hill  and  back  to  the  railway  nineteen 
months  later. 
This  dog  encountered  fly  in  August,  1907,  and  was  thereafter  as  much  in  it 
as  out  and  we  have  on  many  occasions  removed  gorged  Gl.  morsitans  froin  hi  ^ 
?roir’ December  to  February  he  was  somewhat  less  active  than  usua  ,  an 
towards  the  end  of  that  month  rapidly  lost  condition,  temperature  was  elevated 
IT  spleen  enlarged,  but  we  were  unable  to  demonstrate  trypanosomes  in  th 
Tod  He  rapidly  recovered,  but  again  fell  sick  in  October,  1908,  an 
trypanosomes  were  then  seen.  In  November  his  condition  was  piecarious  and 
a  faS  termination  almost  daily  expected.  From  the  night  of  November  a4th  he 
rallied  and  retained  his  improvement  up  to  arrival  in  Pretoria  in  the  middle  0 
Tanuary,  when,  despite  his  lack  of  bodily  condition  from  the  long  hj 
was  iiientally  active.  Trypanosomes  were  not  seen  m  blood  and  g  and 
examinations  between  November  13th  and  January  20th  but  death  took  place 
?rom  this  disease  shortly  after  our  departure  (Dr.  Theiler's  letter  of  April  26th). 
We  have  only  seen  the  disease  in  one  P ig ;  though  it  has  been 
recorded  to  us  from  Chmsali  and  was  then  apparently  acute.  We  are 
unable  to  trace  the  infection  of  this  pig,  which  had  been  at  our  camp 
for  three  weeks  in  apparent  health.  Death  took  place  after  a  visible 
sickness  of  only  six  hours’  duration,  with  trypanosomes  swarming  m 
the  blood  and  post-mortem  changes  indicating  an  intensely  acute 
disease.  These  animals  are  quite  local  in  distribution  and  of  itte 
economic  importance. 
'It 
*  Messrs.  H.  C.  Marshall  and  J.  Deacon. 
X. 
