In  young  children  the  arm  should  be  protected,  to  prevent  the
crust  from  being  detached  too  early.]

Typhus  Fever.
Definition. — An  acute  specific  form  of  fever,  highly  conta-
gious and  infectious,  continuing  from  fourteen  to  twenty-one  days,
attended  with  a  lethargic  or  confused  condition  of  the  intellect,
and  an  eruption  of  a  measles-like  or  mulberry  appearance,  and  is
the  accompaniment  of  privation,  over-crowding,  and  defective
ventilation-
Symptoms.— The  precursory  stage  varies,  but  is  usually  short,
so  that  the  patient  yields  to  the  disease  within  the  first  three  days,
giving  up  his  employment  and  taking  to  his  bed;  in  this  respect
strongly  contrasting  with  the  protracted  invasive  stage  of  Enteria
Sensations  of  uneasiness,  soreness,  or  fatigue,  loss  of  appetite,
frontal  headache,  and  disturbed  sleep  are  the  early  symptoms.
The  patient  is  often  seized  with  a  rigor  (but  less  marked  and
severe  than  in  Small-pox  or  internal  inflammations),  usually
succeeded  by  dry  heat  of  the  skin,  thirst,  quick  pulse,  white,  dry,
often  tremulous  tongue,  scanty  and  highly-colored  urine,  some-
times vomiting,  heavy  look  or  stupor,  prostration,  and  musculai
pains;  towards  evening  there  is  irritability  or  restlessness,  and  if
sleep  occurs  it  is  unrefreshing,  being  disturbed  by  dreams  or
sudden  starts.
