﻿REPORT 
  OF 
  TSETSE-FLY 
  INVESTIGATION 
  IN 
  NIGERIA. 
  

  

  393 
  

  

  in 
  view 
  of 
  the 
  wide 
  distribution 
  of 
  this 
  species 
  throughout 
  the 
  Northern 
  Provinces, 
  

   more 
  especiaUy 
  in 
  the 
  drier 
  parts 
  of 
  the 
  north 
  and 
  north-east, 
  where 
  farming 
  along 
  

   the 
  course 
  of 
  streams 
  is 
  necessarily 
  more 
  widely 
  practised. 
  

  

  TABLE 
  VII. 
  

  

  Showing 
  Localities 
  where 
  Sleeping 
  Sickness 
  has 
  been 
  diagnosed, 
  and 
  the 
  Prevalent 
  Species 
  of 
  Tsetse- 
  

   flies 
  in 
  such 
  Localities. 
  

  

  Province. 
  

  

  Zaria. 
  

  

  Kano 
  

  

  Yola. 
  

  

  Muri. 
  

   Munshi 
  

   Kabba. 
  

   Nassarawa. 
  

  

  Locality. 
  

  

  Kateri, 
  between 
  R. 
  Dinia 
  and 
  R. 
  

  

  Garara. 
  

   Gimi, 
  near 
  R. 
  Gulma. 
  

   Kaduna. 
  

  

  Baser 
  ka, 
  Dingaiya 
  valley. 
  

  

  Aulami 
  and 
  Hadubia, 
  villages 
  near 
  

   Kiawa 
  R., 
  Sokwa 
  District. 
  

  

  Murgu 
  and 
  Pascola, 
  villages 
  near 
  

   Tudun 
  Wada. 
  

  

  Bang, 
  near 
  Numan, 
  8 
  miles 
  south 
  of 
  

  

  R. 
  Benue. 
  

   Jibu, 
  Sansanni, 
  near 
  R. 
  Benue. 
  

   Katsina 
  Ala. 
  

   Lokoja. 
  

   Jemaa. 
  

   Womba. 
  

  

  Diagnosis 
  

   confirmed 
  

  

  micros- 
  

   copically. 
  

  

  + 
  

  

  + 
  

   + 
  

  

  + 
  

   

  

  + 
  

  

  + 
  

   + 
  

   + 
  

   

  

  + 
  

  

  Species 
  

  

  of 
  

  

  tsetse 
  

  

  present. 
  

  

  "2 
  

   S 
  

   s 
  

  

  e> 
  

  

  + 
  

  

  + 
  

   + 
  

  

  + 
  

  

  + 
  

  

  + 
  

  

  + 
  + 
  

  

  + 
  

  

  + 
  + 
  

  

  

  + 
  + 
  

  

  + 
  

   + 
  

   + 
  

  

  + 
  

  

  

  Notes. 
  

  

  Sporadic. 
  

  

  Epidemic. 
  

  

  Sporadic 
  cases, 
  

   1918-1920. 
  

  

  Sporadically 
  

   epidemic 
  ; 
  vil- 
  

   lages 
  deserted. 
  

  

  Epidemic 
  ; 
  

   sporadic 
  cases 
  

   seen 
  in 
  1922. 
  

  

  Epidemic 
  1919 
  : 
  

   one 
  clinically 
  

   positive 
  late 
  

   case 
  seen 
  1921. 
  

  

  Epidemic. 
  

  

  Epidemic. 
  

   Sporadic 
  cases. 
  

   Sporadic 
  cases. 
  

   Epidemic. 
  

   Epidemic. 
  

  

  Several 
  instances 
  of 
  sleeping 
  sickness 
  in 
  purely 
  tachinoides 
  areas 
  have 
  come 
  under 
  

   our 
  notice, 
  and 
  the 
  localities 
  have 
  been 
  visited 
  during 
  the 
  past 
  year. 
  The 
  following 
  

   examples 
  may 
  be 
  quoted. 
  

  

  1. 
  Gimi, 
  Zaria 
  Province. 
  A 
  new 
  settlement 
  for 
  sugar 
  farming 
  upon 
  the 
  border 
  

   of 
  a 
  marshy 
  valley 
  close 
  to 
  its 
  emergence 
  into 
  the 
  River 
  Gulma. 
  In 
  1919 
  epidemic 
  

   sleeping 
  sickness 
  occurred 
  with 
  many 
  deaths, 
  and 
  the 
  villagers 
  mostly 
  scattered, 
  but 
  

   when 
  visited 
  by 
  one 
  of 
  us 
  in 
  1920, 
  60 
  persons 
  remained 
  of 
  whom 
  15 
  showed 
  symptoms 
  

   of 
  the 
  disease 
  and 
  the 
  blood 
  of 
  three 
  contained 
  trypanosomes. 
  Two 
  other 
  cases 
  

   (trypanosomes 
  in 
  gland 
  juice) 
  were 
  discovered 
  in 
  neighbouring 
  villages 
  where 
  the 
  

   disease 
  had 
  not 
  been 
  epidemic. 
  Revisited 
  by 
  us 
  in 
  1921 
  after 
  the 
  village 
  had 
  been 
  

   moved 
  half 
  a 
  mile 
  from 
  the 
  valley 
  and 
  the 
  ford 
  on 
  the 
  River 
  Gulma 
  had 
  been 
  cleared 
  

   of 
  shade, 
  no 
  new 
  cases 
  were 
  discovered. 
  G. 
  tachinoides 
  was 
  present 
  upon 
  the 
  banks 
  

   of 
  the 
  River 
  Gulma 
  and 
  the 
  flies 
  extended 
  up 
  the 
  marshy 
  valley 
  in 
  the 
  rainy 
  season 
  ; 
  

   no 
  other 
  species 
  of 
  tsetse 
  was 
  taken 
  upon 
  either 
  visit. 
  The 
  villagers 
  of 
  Gimi 
  had 
  

   lived 
  in 
  intimate 
  contact 
  with 
  fly 
  and 
  had 
  suffered 
  an 
  epidemic 
  of 
  sleeping 
  sickness, 
  

  

  