herpes zoster

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herpes 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 chickenpoxchickenpox
or varicella
, 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
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, and can hide in the nerves after a chickenpox infection has passed. Herpes zoster is most common in persons over the age of 50. It most often involves the area of the upper abdomen and lower chest, but may appear along other nerve pathways including that leading to the eye; serious ocular complications can lead to blindness. The disease can be treated with antivirals, and aspirin and other analgesics are used to relieve pain. Vaccination is recommended for individuals 50 years or older. Although the disease is generally nonrecurrent, it can permanently damage nerves and lead to postherpetic neuralgia, whose often severe, persistent pain is more difficult to control.

Herpes Zoster

 

(also called shingles), an acute viral infectious disease that affects the nervous system and skin. Some evidence suggests that the virus of herpes zoster causes chicken-pox in children.

The infectious process in herpes zoster can be concentrated along any nerve trunk, although the intercostal nerve trunks and the branches of the trigeminal nerve are especially susceptible to infection. Characteristically, only one side of the body is affected. Skin lesions are usually preceded by general malaise, elevated temperature, slight itching, tingling sensations, and neuralgic pain at the site of future eruptions. These symptoms are followed by the appearance of pink, edematous patches. Within three to four days after the onset of the fever, groups of nodules form on the edematous base; these quickly turn into vesicles with transparent contents. The local lymph nodes enlarge, and the pain intensifies. Within six to eight days, the vesicles dry and form yellowish brown crusts that subsequently fall away, leaving slightly pigmented spots.

Atypical forms of herpes zoster occur. Vesicular eruptions are absent in the abortive form, while the eruptions in the bullate form appear as large blisters. In hemorrhagic herpes zoster, the contents of the vesicles and blisters are bloody. Necrosis of tissue followed by scarring is symptomatic of gangrenous herpes zoster.

In the absence of complications, herpes zoster lasts from three to four weeks. Pain sometimes persists for several months. Treatment involves the use of pain relievers, vitamins, ultraviolet radiation, and antiviral agents. Alcoholic solutions of aniline dyes are topically applied; also recommended are neutral powders and zinc ointments or pastes.

I. IA. SHAKHTMEISTER

herpes zoster

[¦hər‚pēz ′zäs·tər]
(medicine)
A systemic virus infection affecting spinal nerve roots, characterized by vesicular eruptions distributed along the course of a cutaneous nerve. Also known as shingles; zoster.
References in periodicals archive ?
O primeiro t-pattern e relativo a um esquema tatico--canto, em que este e executado longo (CL), da zona ofensiva direita (ZOD), sendo que a finalizacao para gol e conseguida na zona frontal da baliza (F) de cabeca.
Las diferencias en rendimiento son mas evidentes al comparar la productividad por ciclo en las plantaciones evaluadas, porque la comparacion del promedio de la produccion del cultivo sin distingo de la zona climatica resulto significativamente heterogenea ([F.sub.2,804] = 246,802; p<0,001), de tal manera que las diferencias absolutas de las medias de cada par fueron mayores que el valor minimo significativo de la prueba Tukey-Kramer (p<0,05), donde: plantilla > soca = 16,4t x [ha.sup.-1]; plantilla >resoca= 20,6t x [ha.sup.-1]; y soca >resoca= 4,3t x [ha.sup.-1].
Photomicrograph of the adrenal cortex of the African giant Rat (Cricetomys gambianus) showing adipose tissue: AT; Capsule: C; Zona Glomerulosa: ZG and Zona Fasiculata: ZF.
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La zona de ludicas esta en la plaza que se encuentra en el proyecto que une la zona privada y la publica hecha para cien personas y al aire libre para que se puedan desarrollar diferentes tipos de actividades.
La E.I.S de Ayusuma se encuentra ubicada a 1 km del poblado del mismo nombre, a la margen izquierda del rio Achasiri, en la falda del cerro Laucata, de pendiente fuerte, donde afloran rocas fracturadas con presencia de vegetacion tipica en la zona. Los bloques aislados con diametro menor de 2 m pueden desprenderse y afectar el inmueble con presencia de movimientos sismicos.
The novel is a whirlwind of nicely developed subplots: Zona can easily keep in touch with her two best friends, Hillary and Matt, back in New York City-- particularly when Matt falls for an older guy--through the Internet, Skype, and international phones.
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