A widely common viral disease .It is common in immunocompromised, Tranplant recipients and HIV Positive patients. It is an infectious disease, which affects the peripheral nervous system.
It is also known as shingles. Herpes zoster is an acute neuralgia confined to the distribution of a specific spinal nerve root or cranial nerve. It is associated with a characteristic dermatomal, painful and usually vesicular rash and occurs more often in the immunocompromised host.
The primary site of infection is Sensory ganglion, Dorsal root. The Trigeminal ganglion may be effected. It can effect any body part along dermatomes.
The feature is vesicles or Vesicular Rash .
Generally a single sensory ganglion is affected. Although the rash occurs most often in the distribution of the lower thoracic dermatomes, any spinal segment or trigeminal nerve division may be implicated.
The herpes zoster infections may involve the geniculate ganglion of VII CN. Herpes rash occurs on the eardrum and adjacent auditory canal.
It can become widespread in severe cases.
Acyclovir and related Drugs are useful. The Complication of Post herpetic Neuralgia is a serious issue as it can be intensly Painful and responds to Phenytion , Carbamezapine like Drugs .
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