^  Ai-r-ir-


Flc:.  H4. — Rmbn'onf  Vn'^mnrhi     *riT:rv":iT.  J  '    1>- i-i^l  i  j  I:.'   •■l-.-A


divided  into  tour,  eight,  sixtten,  or  inort  -cgnicnt-  ii<-ing  the  most
common.  The  eggs  should  be  -carclicd  i-ir  in  the  I'.iii-.  :■  -ncill
amount  being  mixed  in  a  dr'.|i  <■:  water  ■.•.:v'.  •]t<-:i<]  ■■n  tin-  -\i-\-.  "I  ]■.'■
older  the  fseces  and  the  warmer  the  v.f;;;h<;r  ihc  m.-rc'  ;id.:i;n'-d  v.ill


384


CLINICAL   DIAGNOSIS


ihc  scgmrntation  he.      Of  L'licinaria  aiiicricana  it  is  more  common
to  liix)  tlic  tiilly  devcloi>c<l  cmbryu  wiiliin  ilie  egg<sh«ll  or  irtt.
It  is  well  in  a  suspected  case  to  allow  llie  stool  well  mixe<l  willi
water  to  sediiiienl.  or  tu  ceti[rifn{>:alizc  it:  the  egjjs  will  be  found  at
llic  lK)ttom.  The  adults  may  be  found  in  iIk  sedimeuied  slool  after
a  small  dose  of  tliyniol  fojlowcfl  by  oil.  The  adults  are  usually
red  from  the  blood  wiih  wliich  tbcy  arc  filled.  They  occur  in  tlic
duodenum,  jejiuuiiu.  and  ileum,  many  tbousaiuls  sometimes  in  oiiff
perstm.  althouRh.  as  a  ntlc.  not  more  tban  a  few  hundred.  Whilr
they  do  not  multiply  in  the  intestine  they  may  live  there  for  fivf
years.     'Iliey  cause  a  severe  chlorotic  an;vn)ia.
Stiles  .suggested  Ihe  simple  test  of  placing  a  small  portion  of  slool
on  wliite  blottiufj-paiwr  and  allowing  it  to  stay  for  an  hour  or
longer.     On  removing  it  a  re<ldish-brown  stain  remains.
a


Fia.ls>— D'"'""<>'*'i'*o'*tuiii.    a.uluLt:  A,  en  wllhembr>«i  c,  rniply  ihell.    |Fr«m  v.  Jikacti  ]
TRICHOCKPtlAI.US       ThiuUIUKIS.  TRtCIIOCEPlI  ALUS        DiSFAR.
Trichiuris  Twciuura.— This  is  the  ordinary  whip-worm,  a  worm
from  4  to  5  cm.  long,  with  two-thirds  of  the  length  a  whip-like  tail.
