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  ANNUAL 
  REPORT 
  SMITHSONIAN 
  INSTITUTION, 
  1922. 
  

  

  place 
  is 
  taken 
  by 
  a 
  creature 
  called 
  coloradilla, 
  which 
  from 
  its 
  effects 
  

   is 
  probably 
  the 
  same 
  as 
  our 
  red 
  bug 
  or 
  chigger. 
  The 
  true 
  chigger 
  or 
  

   nigua 
  is 
  common 
  in 
  Salvador 
  — 
  a 
  pernicious 
  flea 
  which 
  burrows 
  into 
  

   one's 
  toes 
  and 
  does 
  serious 
  damage 
  if 
  not 
  promptly 
  removed, 
  but 
  one 
  

   who 
  wears 
  shoes 
  is 
  not 
  likely 
  to 
  be 
  bothered 
  by 
  niguas. 
  

  

  In 
  all 
  tropical 
  American 
  countries 
  the 
  animal 
  that 
  is 
  the 
  most 
  

   dangerous 
  and 
  usually 
  the 
  only 
  one 
  that 
  is 
  a 
  serious 
  menace 
  to 
  life 
  

   is 
  one 
  of 
  the 
  smallest 
  and 
  most 
  innocent-appearing 
  — 
  the 
  mosquito. 
  

   Without 
  mosquitos 
  there 
  would 
  be 
  no 
  malaria, 
  and 
  malaria 
  is 
  the 
  

   worst 
  scourge 
  of 
  the 
  Tropics, 
  at 
  least 
  for 
  foreigners, 
  since 
  yellow 
  

   fever 
  has 
  been 
  so 
  nearly 
  eradicated. 
  In 
  nearly 
  all 
  parts 
  of 
  Central 
  

   America 
  malaria 
  is 
  prevalent, 
  and 
  Salvador 
  is 
  no 
  exception. 
  Because 
  

   the 
  climate 
  here 
  is 
  comparatively 
  dry, 
  malaria 
  is 
  not 
  so 
  common 
  

   as 
  upon 
  the 
  north 
  coast, 
  but 
  it 
  is 
  nevertheless 
  still 
  sufficiently 
  preva- 
  

   lent. 
  It 
  can 
  be 
  avoided 
  by 
  protection 
  against 
  mosquito 
  bites, 
  and 
  one 
  

   who 
  is 
  careful 
  always 
  to 
  sleep 
  beneath 
  a 
  net 
  runs 
  little 
  chance 
  of 
  

   contracting 
  the 
  malady. 
  In 
  Salvador 
  I 
  saw 
  very 
  few 
  mosquitos 
  

   during 
  the 
  dry 
  season, 
  but 
  they 
  are 
  reported 
  to 
  be 
  more 
  numerous 
  

   after 
  the 
  rains 
  begin. 
  Only 
  by 
  extermination 
  of 
  the 
  insects 
  would 
  

   it 
  be 
  possible 
  to 
  control 
  the 
  disease, 
  and 
  this 
  is 
  impossible. 
  Amoebic 
  

   dysentery 
  is 
  another 
  dangerous 
  disease 
  of 
  tropical 
  American 
  coun- 
  

   tries, 
  but 
  it 
  does 
  not 
  seem 
  to 
  be 
  very 
  common 
  in 
  Salvador. 
  In 
  

   general 
  the 
  country 
  is 
  a 
  rather 
  healthy 
  one, 
  the 
  result 
  in 
  large 
  part 
  

   of 
  the 
  labors 
  of 
  an 
  efficient 
  health 
  service, 
  supported 
  in 
  substantial 
  

   part 
  by 
  the 
  Rockefeller 
  Institution, 
  which 
  maintains 
  here 
  an 
  agent, 
  

   especially 
  for 
  assistance 
  in 
  control 
  of 
  the 
  hookworm 
  disease. 
  Of 
  all 
  

   American 
  influences 
  in 
  Salvador 
  there 
  is 
  no 
  other 
  that 
  is 
  so 
  disinter- 
  

   ested, 
  so 
  utilitarian, 
  and 
  so 
  appreciated 
  as 
  this 
  work 
  of 
  one 
  of 
  our 
  

   great 
  scientific 
  organizations, 
  whose 
  operations 
  must 
  be 
  a 
  matter 
  of 
  

   deep 
  satisfaction 
  to 
  all 
  Americans 
  who 
  have 
  observed 
  its 
  practical 
  

   field 
  work. 
  

  

  