Surrounding deprive (surrounding herpes) - acute virus disease (a lesion of spinal ganglions), shown a pain and dermal rashes at a level of a lesion.

Etiology. A virus of a chicken pox.

Pathogenesis. An inflammation of one or several spinal ganglions and adjoining sites of back roots or homologous formations of cranial nerves. It is supposed, that after the chicken pox transferred by the childhood its virus is kept in spinal ganglions. Spontaneously (the idiopathic form) or owing to serious illnesses (leukoses, a cancer), overwhelming immunity, a virus becomes pathogenic and alongside with dermatotropic gets neurotropic properties.

Signs, current. Disease begins with acute radicular pains quite often on a background of the general malaise and a small fever. After pains in a zone of the amazed roots there are rashes in the form of blisters; in especially serious cases they can have violent or necrotic character. Regarding cases, besides segmentary rashes, there are absent-minded vesicles. Occasionally rashes and pains are accompanied with the limited paralyses of muscles; in case of development of paresises in muscles of an abdominal wall there are diverticulums which can give an occasion to the unreasonable assumption of presence of a tumour. In half of cases herpes zoster it is localized in thoracal segments, in 20 % of cases the trigeminal unit is amazed. In the latter case pains and rashes are localized more often in a zone of 1 branch: both blepharons, a forehead. Herpes zoster ophthalmicus represents the certain danger to vision in case of rashes on a cornea. The lesion of a geniculate ganglion leads to rashes in an auricle, causes occurrence hurt on behalf of.