Herpes, Type 1 and Type 2

…..The weather on Long Island continues to be perfect beach weather; I hope everyone is taking the time to enjoy the outdoors, spending wonderful times with family and friends.

…..Let’s get back to our review of the herpes simplex virus (HSV).  HSV is a DNA virus classified into two subtypes, 1 and 2, based on various proteins making up the virus.  HSV-1 is primarily the cause of herpes of the mouth and in the past was said to be the cause of infections above the waist.  It can also be responsible for genital infections, and these infections are becoming more common, especially among young women.

…..HSV-2 is almost always a genital infection.  The virus is spread through direct contact with mucosa (moist tissue like the vagina and lips/mouth) or damaged, irritated skin.  Incubation of the virus lasts for about a week, and the virus then reproduces in the superficial layers of the skin, causing inflammation and damage.  During the first infection, the virus enters the nerve cells and becomes dormant.  The virus can reactivate and cause ulcerative disease or shed without any symptoms.

…..Let me leave you with a few interesting factsH2:

  • In the US, 20% of women have had an HSV-2 infection
  • Most infections are spread by those who are unaware of having HSV
  • Recurrent disease is more common in those with type 2, compared to those with type 1

-Dr. P




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