﻿392 
  

  

  W. 
  B. 
  JOHNSON 
  AND 
  LLEWELLYN 
  LLOYD. 
  

  

  TABLE 
  VI. 
  

  

  Showing 
  that 
  G. 
  morsitans 
  is 
  more 
  inhibitory 
  to 
  Cattle 
  than 
  G. 
  palpalis 
  or 
  G. 
  tachinoides, 
  and 
  

  

  its 
  Association 
  with 
  Game. 
  

  

  

  

  

  

  

  

  

  

  

  

  

  ■- 
  

  

  S 
  

  

  

  05 
  

  

  

  

  

  

  

  

  

  

  

  *> 
  

  

  s 
  

   -5; 
  

  

  <3 
  

  

  Number 
  

   of 
  

  

  Large 
  game. 
  

  

  

  Small 
  

  

  game. 
  

  

  

  

  Cattle. 
  

  

  

  ? 
  

  

  

  

  <6 
  

  

  localities. 
  

  

  

  

  

  

  

  

  

  

  yj 
  

  

  — 
  

  

  + 
  

  

  + 
  + 
  

  

  — 
  

  

  + 
  

  

  + 
  + 
  

  

  + 
  + 
  + 
  

  

  — 
  

  

  + 
  

  

  + 
  + 
  

  

  + 
  + 
  

  

  + 
  

  

  

  

  25 
  

  

  

  

  3 
  

  

  22 
  

  

  

  

  1 
  

  

  23 
  

  

  1 
  

  

  24 
  

  

  1 
  

  

  

  

  

  

  + 
  

  

  + 
  

  

  

  10 
  

  

  

  

  3 
  

  

  7 
  

  

  

  

  3 
  

  

  6 
  

  

  1 
  

  

  9 
  

  

  1 
  

  

  

  

  

  

  + 
  

  

  + 
  

  

  + 
  

  

  4 
  

  

  

  

  3 
  

  

  1 
  

  

  

  

  3 
  

  

  1 
  

  

  

  

  4 
  

  

  

  

  

  

  

  

  + 
  

  

  

  + 
  

  

  8 
  

  

  

  

  4 
  

  

  4 
  

  

  

  

  4 
  

  

  4 
  

  

  

  

  6 
  

  

  

  

  

  

  2* 
  

  

  

  + 
  

  

  

  32 
  

  

  16 
  

  

  2 
  

  

  14 
  

  

  3 
  

  

  12 
  

  

  17 
  

  

  

  

  17f 
  

  

  6 
  

  

  4 
  

  

  5 
  

  

  

  + 
  

  

  + 
  

  

  8 
  

  

  2 
  

  

  2 
  

  

  4 
  

  

  2 
  

  

  2 
  

  

  4 
  

  

  

  

  7J 
  

  

  

  

  

  

  1 
  

  

  

  

  + 
  

  

  36 
  

  

  18 
  

  

  12 
  

  

  6 
  

  

  

  

  29 
  

  

  7 
  

  

  

  

  17 
  

  

  3 
  

  

  4 
  

  

  12§ 
  

  

  Notes 
  — 
  * 
  Trekking 
  cattle. 
  

  

  I 
  Nine 
  of 
  these 
  on 
  R. 
  Benue 
  backed 
  by 
  morsitans. 
  

   % 
  Four 
  of 
  these 
  on 
  R. 
  Benue 
  backed 
  by 
  morsitans. 
  

   § 
  Eight 
  of 
  these 
  trekking 
  cattle. 
  

  

  VIII. 
  — 
  Sleeping 
  Sickness. 
  

  

  Sleeping 
  sickness 
  is 
  endemic 
  over 
  a 
  large 
  part 
  of 
  the 
  Northern 
  Provinces 
  of 
  

   Nigeria. 
  The 
  Annual 
  Medical 
  Returns 
  give 
  a 
  totally 
  inadequate 
  figure 
  for 
  the 
  

   yearly 
  incidence 
  of 
  cases, 
  as 
  sporadic 
  native 
  cases 
  are 
  not 
  diagnosed 
  except 
  in 
  

   Government 
  stations, 
  and 
  local 
  epidemics 
  are 
  infrequently 
  diagnosed 
  owing 
  to 
  the 
  

   difficulty 
  of 
  a 
  medical 
  officer 
  being 
  spared 
  to 
  investigate 
  them. 
  

  

  Ten 
  cases 
  in 
  Europeans 
  have 
  been 
  recorded 
  during 
  the 
  past 
  1 
  1 
  years, 
  5 
  of 
  which 
  

   occurred 
  in 
  Nassarawa 
  Province, 
  2 
  in 
  Kabba 
  Province, 
  2 
  on 
  the 
  River 
  Benue, 
  and 
  

   1 
  at 
  Kaduna. 
  The 
  high 
  incidence 
  in 
  Nassarawa 
  is 
  explained 
  by 
  the 
  fact 
  that 
  the 
  

   sufferers 
  have 
  been 
  mining 
  engineers 
  whose 
  work 
  leads 
  them 
  to 
  camp 
  close 
  to 
  tsetse- 
  

   infested 
  streams, 
  usually 
  in 
  proximity 
  to 
  a 
  camp 
  of 
  native 
  labourers. 
  

  

  Reports 
  of 
  limited 
  epidemics 
  among 
  natives 
  are 
  frequently 
  received 
  from 
  political 
  

   officers, 
  but 
  these, 
  as 
  explained 
  above, 
  cannot 
  always 
  be 
  investigated. 
  The 
  usual 
  

   history 
  obtained 
  is 
  as 
  follows 
  : 
  — 
  a 
  few 
  natives 
  from 
  a 
  town 
  or 
  village 
  decide 
  to 
  farm 
  

   new 
  ground, 
  and 
  naturally 
  select 
  a 
  site 
  in 
  close 
  proximity 
  to 
  a 
  stream 
  ; 
  the 
  farm 
  

   extends 
  and 
  in 
  a 
  year 
  or 
  two 
  a 
  small 
  village 
  has 
  sprung 
  up 
  ; 
  a 
  few 
  sporadic 
  cases 
  

   of 
  sleeping 
  sickness 
  occur 
  but 
  are 
  not 
  noticed 
  ; 
  finally 
  the 
  disease 
  appears 
  in 
  epidemic 
  

   form, 
  the 
  farm 
  is 
  deserted 
  and 
  the 
  people 
  scatter 
  to 
  surrounding 
  villages. 
  Such 
  a 
  

   history 
  of 
  events 
  is 
  frequently 
  obtained, 
  and 
  ruins 
  of 
  deserted 
  villages 
  near 
  tsetse- 
  

   infested 
  streams 
  bear 
  evidence 
  of 
  what 
  has 
  occurred. 
  The 
  peaceful 
  state 
  of 
  the 
  

   country 
  under 
  British 
  control 
  has 
  led 
  to 
  a 
  migration 
  from 
  towns 
  to 
  settlement 
  upon 
  

   farms 
  and 
  has 
  probably 
  increased 
  the 
  incidence 
  of 
  sleeping 
  sickness 
  very 
  considerably. 
  

   The 
  actual 
  yearly 
  mortality 
  from 
  the 
  disease 
  is 
  no 
  doubt 
  insignificant 
  when 
  compared 
  

   with 
  that 
  of 
  common 
  diseases, 
  such 
  as 
  pneumonia 
  or 
  small-pox, 
  but 
  sleeping 
  sickness 
  

   is 
  of 
  the 
  greatest 
  "practical 
  importance 
  as 
  a 
  factor 
  inhibiting 
  the 
  extension 
  of 
  farming 
  

   into 
  fertile 
  areas. 
  

  

  A 
  tabulation 
  of 
  a 
  few 
  of 
  the 
  sleeping 
  sickness 
  outbreaks 
  of 
  which 
  notes 
  are 
  to 
  

   hand 
  shows 
  how 
  widely 
  over 
  the 
  country 
  the 
  disease 
  is 
  spread. 
  It 
  shows 
  also 
  

   (Table 
  VII) 
  that 
  the 
  disease 
  occurs 
  in 
  the 
  presence 
  of 
  G. 
  palpalis 
  alone 
  (Nassarawa 
  

   Province), 
  G. 
  tachinoides 
  alone 
  (Zaria 
  and 
  Kano 
  Provinces) 
  and 
  palpalis 
  with 
  tachi- 
  

   noides. 
  Its 
  occurrence 
  in 
  the 
  presence 
  of 
  tachinoides 
  alone 
  is 
  of 
  great 
  importance 
  

  

  