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Herpes simplex virus 1 and 2 (HSV-1 and HSV-2) are two members of the human Herpesviridae family, a set of viruses that produce viral infections in the majority of humans. [1] [2] Both HSV-1 and HSV-2 are very common and contagious. They can be spread when an infected person begins shedding the virus.
Risk of transmission by a mother with existing antibodies for both HSV-1 and HSV-2 has a much lower (1–3%) transmission rate. This in part is due to the transfer of a significant titer of protective maternal antibodies to the fetus from about the seventh month of pregnancy.
In one study, daily genital swab samples found Herpes simplex virus 2 at a median of 12–28% of days among those who have had an outbreak, and 10% of days among those suffering from asymptomatic infection, with many of these episodes occurring without visible outbreak ("subclinical shedding"). [7]
HSV epigenetics is the epigenetic modification of herpes simplex virus (HSV) genetic code.. As of 2012, an estimated 3.7 billion people globally were infected with oral herpes simplex virus (HSV-1), and 417 million were living with genital herpes (HSV-2) worldwide (World Health Organization, 2018).
When physical examination of the newborn shows signs of a vertically transmitted infection, the examiner may test blood, urine, and spinal fluid for evidence of the infections listed above. Diagnosis can be confirmed by culture of one of the specific pathogens or by increased levels of IgM against the pathogen. [citation needed]
The annual incidence in Canada of genital herpes due to HSV-1 and HSV-2 infection is not known (for a review of HSV-1/HSV-2 prevalence and incidence studies worldwide, see Smith and Robinson 2002). As many as one in seven Canadians aged 14 to 59 may be infected with herpes simplex type 2 virus [ 89 ] and more than 90 per cent of them may be ...
Herpes genitalis caused by HSV-2 recurs on average four to six times per year, while that of HSV-1 infection occurs only about once per year. [12] People with recurrent genital herpes may be treated with suppressive therapy, which consists of daily antiviral treatment using acyclovir, valacyclovir or famciclovir. [13]
HSV-1 can in rare cases be transmitted to newborn babies by family members or hospital staff who have cold sores; this can cause a severe disease called neonatal herpes simplex. People can transfer the virus from their cold sores to other areas of the body, such as the eye, skin, or fingers; this is called autoinoculation. Eye infection, in the ...