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Thread: How the Herpes Simplex Virus Works

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    Default How the Herpes Simplex Virus Works

    How the Herpes Simplex Virus Works

    The herpes virus is one of the most difficult viruses to control. Scientists study how the virus works in order to understand how to combat it. It is also important for the general public to understand how this virus works because 85 percent of the world has been infected with one of the herpes simplex viruses.
    The Herpes Simplex Virus
    The word "herpes" is taken from the Greek word "herpein" which means "to creep." The herpes simplex viruses are double-stranded DNA viruses that only infect humans. There are two types of herpes simplex viruses:

    * Herpes simplex virus type 1 (HSV-1)
    * Herpes simplex virus type 2 (HSV-2)

    Herpes Simplex Virus Infections
    A person can be infected with one or both herpes viruses. It has generally been believed that HSV-1 infections occurred in the mouth and HSV-2 infections occur in the genital area. Now it has been shown that either type of virus can infect either site.
    How the Herpes Simplex Virus Works

    * The virus comes in contact with broken skin or the lining of the mouth, vagina, or anus.
    * The virus goes to the nuclei of the cells and tries to reproduce itself, or replicate.
    * Though the cells are infected, most people do not get symptoms.
    * Sometimes the virus's replication process destroys the cells it has invaded causing blisters or ulcers to form on the skin.
    * The blisters or ulcers crust over and heal without scarring.
    * The virus is transported back through the nerve to important nerve branching points called ganglia deep in the body.
    * The virus stays in the ganglia in an inactive, or latent, form. During this time, the virus does not replicate. It stays in this latent form for varying amounts of time.
    * Certain triggers may cause the virus to travel back down the nerve to the skin and cause symptoms again. This is known as recurrence.

    Causes of Herpes Simplex Virus Recurrences
    Even with a normal immune system, recurrences can happen. Sometimes the recurrence occurs spontaneously. However, the following are known triggers that can stimulate a recurrence:

    * Physical stress
    * Poor emotional coping style
    * Persistent stressors for greater than 1 week

    * Anxiety
    * Fever
    * Exposure to ultraviolet light
    * Nerve damage
    * Tissue damage
    * A suppressed immune system
    * Heat
    * Cold
    * Menstruation
    * Other infections
    * Fatigue

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    Thumbs up good!!

    thats nice {zts nice}...btw the recurrences are usually fatal..i know jus one..herpes zoster that can recur as Shingles..and sometimes wen there is added facial nerve involvement,its called RAMSAY HUNT SYNDROME)
    P.S.facial nerve only coz the virus is known to colonise the trigeminal tract during the latent phase.."colonise"--wonder if u can say that for viruses

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    Hey Fathima, hw r u?
    Btw, zts herpes simplex virus. zer r 2 types HSV 1 and 2.
    C/F
    these cause
    cutaneous inf such as fever blister, herpetic whitlow, eczema herpeticum n kaposi's varicelliform eruptn.
    Mucosal-- gingivostomatitis, pharyngitis n recurrent herpes labialis.
    Ophthalmic-- corneal blindness, acute keratoconjunctivits, follicular conjunctivitis, typical branching dendritic ulcer.
    Nervous systm-- HSV encephalitis, meningitis, sacral autonomic dysfunction, transverse myelitis.
    Visceral-- HSV esophagitis, tracheobronchitis, pneumonitis.
    Genital-- in male affects penis n urethra, in females affect perineum, vulva, vagina, cervix, probable ass wiz Ca cervix!!

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    Varicella (chickenpox) and herpes zoster are different manifestations of the virus Varicella zoster

    chickenpox follows primary infection in a non immune individual, while herpes zoster is a reactivation of the latent virus when the immunity has fallen to ineffective levels...

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    Very Informative !!! HOD will be happy to see this in our Exam papers..

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