It is highly infectious disease caused by Varicella zoster virus, characterized by fever and malaise.
Agent : Varicella zoster virus
Source of infection : Cases of chicken pox
Period of infectivity : 1-2 days after appearance of rash and 4-5 days afterwards.
Environmental factors : Occurs mostly in first six months of age.
Age : Mostly occurs in children below 10 years.
Incubation period : 14-16 days.
Mode of transmission : · Droplet infection
- Face to face contact
- Placental route
- Pre-eruptive stage : Mild fever, pain in back, malaise, shivering. Stage lasts for 2-3 days.
- Eruptive stage : It comes on the day when fever starts.
Symmetrical, first on trunk and then on face.
Rapid evolution : Advances quickly through macular, popular and vesicular form and forms scab.
Pleomorphism : All stages of rash can be seen at a time
Fever : Fever doesn’t run high.
- Cerebral atonia
Varicella zoster immunoglobin given within 72 hours of exposure has been recommended for prevention.
Isolation of cases for about 6 days after onset of rash.
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