chickenpox

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chickenpox

or

varicella

(vâr'əsĕl`ə), infectious disease usually occurring in childhood. It is caused by the same herpesvirus, varicella-zoster, that produces shingles; the virus can hide in the nerves after a chickenpox infection has passed and cause shingles later in life (see herpes zosterherpes zoster,
infection of a ganglion (nerve center) with severe pain and a blisterlike eruption in the area of the nerve distribution, a condition called shingles. The causative organism is varicella-zoster, a common, filtrable virus that also causes chickenpox, and can hide
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). Chickenpox is highly communicable and is characterized by an easily recognizable rash consisting of blisterlike lesions that appear two to three weeks after infection. Usually there are also low fever and headache. When the lesions have crusted over, the disease is believed to be no longer communicable; however, most patients simultaneously exhibit lesions at different stages of eruption. Chickenpox is usually a mild disease requiring little treatment other than medication to relieve the troublesome itching, but care must be taken that the rash does not become secondarily infected by bacteria. Pneumonia and encephalitis are rare complications. A vaccine for chickenpox was approved for use in the United States in 1995. The drug acyclovir may be used to treat the disease, particularly in older patients.

chickenpox

[′chik·ən‚päks]
(medicine)
A mild, highly infectious viral disease of humans caused by a herpesvirus and characterized by vesicular rash. Also known as varicella.

chickenpox

a highly communicable viral disease most commonly affecting children, characterized by slight fever and the eruption of a rash