pox is an acute and highly contagious viral infection caused by the varicella
zoster virus. This viral disease is characterized by dry itching (pruritus) and
a skin rash with fluid-filled blisters that burst and form crusts. Chicken pox is also known as varicella and it is a classical childhood disease.
The most common cause of infection is through
the respiratory droplets that are inhaled by another person. It is transmitted
from person to person by droplet infection through the respiratory tract.
People who have never had chickenpox can get infected just by being in a room
with someone who has the disease. If one member in the family gets chickenpox,
he usually will infect another family member unless precautions are taken.
Rarely the condition may be caused by exposure
to herpes zoster.
The onset of the chicken pox rash may be
preceded by a day of mild fever and weakness. The infectious period lasts from
about three days before the rash appears until all the blisters have formed
Most children are infected with the virus by the
age of 10. After infection, lifelong immunity against recurrent infection is
usually present. People who have not had the disease are at risk of getting it;
if they come in contact with an infected person. It affects all races and both
sexes are equally prone to it.
Chicken pox is usually a
self-limiting disease and symptoms usually go away without treatment. However in some patients severe complications may occur.
It may precipitate herpes zoster, hemorrhages, pneumonia, brain disorders, etc.
Vaccination against chicken pox is available in