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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.
The second, called, IgG is produced indefinitely. Therefore, the presence of IgM in the blood of the host is used to test for acute infection, whereas IgG indicates an infection sometime in the past. [8] Both types of antibodies are measured when tests for immunity are carried out. [9] Antibody testing has become widely available.
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 ...
It is very common and contagious; about 67% of the world population under the age of 50 has Herpes simplex virus 1. [5] It is often acquired orally during childhood. It may also be sexually transmitted, including contact with saliva, such as kissing and mouth-to-genital contact ( oral sex ). [ 6 ]
Infection by the type 1 strain of herpes simplex virus (HSV-1) is most common; however, cases of oral infection by the type 2 strain are increasing. [14] Oral HSV-2 shedding is rare, and "usually noted in the context of first episode genital herpes." [21] In general, both types can cause oral or genital herpes. [22] [23] [24]
It is estimated to affect at least 1 in 500,000 individuals per year, [1] and some studies suggest an incidence rate of 5.9 cases per 100,000 live births. [2] About 90% of cases of herpes encephalitis are caused by herpes simplex virus-1 (HSV-1), the same virus that causes cold sores.
The HSV is a double-stranded DNA virus categorised into two types; HSV-1 and HSV-2. HSV-1 is predominantly responsible for oral, facial and ocular infections whereas HSV-2 is responsible for most genital and cutaneous lower herpetic lesions. Both HSV-1, and HSV-2 can be the cause of herpetic gingivostomatitis, [5] although HSV-1 is the source ...
Serum EBV capsid antigen IgG and IgM (VCA) and EBV nuclear antigen IgG (EBNA) Herpes simplex virus: CSF PCR, can be repeated within 2 to 7 days of disease onset if negative with high clinical suspicion; or CSF for HSV-IgG after 10–14 days of disease onset HHV-6: CSF PCR paired with serum PCR to exclude viral