Worldwide rates of either HSV-1 and/or HSV-2 are between 60 and 95% in adults. HSV-1 is more common than HSV-2, with rates of both increasing as people age. HSV-1 rates are between 70% and 80% in populations of low socioeconomic status and 40% to 60% in populations of improved socioeconomic status. An estimated 536 million people or 16% of the population worldwide were infected with HSV-2 as of 2003 with greater rates among women and in those in the developing world. Rates of infection are determined by the presence of antibodies against either viral species.
Cullins explains that even if you’ve never had an outbreak, if you’ve been exposed to herpes, it lies dormant in your body. A blood test could reveal antibodies for HSV-1 and/or HSV-2, which means that you have been exposed to the infection in your past, you have been infected, and you have developed antibodies because your body has or is fighting the infection.
HSV-1 has been proposed as a possible cause of Alzheimer's disease. In the presence of a certain gene variation (APOE-epsilon4 allele carriers), HSV-1 appears to be particularly damaging to the nervous system and increases one's risk of developing Alzheimer's disease. The virus interacts with the components and receptors of lipoproteins, which may lead to its development.
You've probably heard of herpes and know it can come in two strains, genital or oral. But that's about as far as most people's knowledge of the STI goes. No shade, BTW. Our sex education in this country is so dire, it's not our fault. But, we do need to know much more about the symptoms, treatments, cures and tests for oral herpes because according to the World Health Organisation, 67 per cent of humans have the infection.
Cullins explains that the first, or initial, outbreak is usually the worst, and “over time when you have recurrent episodes, you may not have systemic symptoms” or frequent symptoms. But everyone’s body and immune system reacts to the virus differently; while some people may never have many outbreaks, other people may be more chronically symptomatic. The National Institutes of Health indicate that infrequent outbreaks, around one or two per year, are not uncommon.
STI and sexual health expert Michael Asher (who is also CEO at Better2know, the company behind the STI testing for E4's The Sex Clinic) explains what we all should know about oral herpes. He says, "With 3.7 billion people under the age of 50 being infected with HSV1, it is incredibly common and just a single exposure to the virus can lead to infection."
Most people with genital herpes have no symptoms, have very mild symptoms that go unnoticed, or have symptoms but do not recognize them as a sign of infection. Genital herpes symptoms include blisters, sharp pain or burning feelings if urine flows over sores, an inability to urinate if severe swelling of sores blocks the urethra (tube from the bladder to outside the vagina), itching, open sores, and pain in the infected area.
The risk of transmission from mother to baby is highest if the mother becomes infected around the time of delivery (30% to 60%), since insufficient time will have occurred for the generation and transfer of protective maternal antibodies before the birth of the child. In contrast, the risk falls to 3% if the infection is recurrent, and is 1–3% if the woman is seropositive for both HSV-1 and HSV-2, and is less than 1% if no lesions are visible. Women seropositive for only one type of HSV are only half as likely to transmit HSV as infected seronegative mothers. To prevent neonatal infections, seronegative women are recommended to avoid unprotected oral-genital contact with an HSV-1-seropositive partner and conventional sex with a partner having a genital infection during the last trimester of pregnancy. Mothers infected with HSV are advised to avoid procedures that would cause trauma to the infant during birth (e.g. fetal scalp electrodes, forceps, and vacuum extractors) and, should lesions be present, to elect caesarean section to reduce exposure of the child to infected secretions in the birth canal. The use of antiviral treatments, such as aciclovir, given from the 36th week of pregnancy, limits HSV recurrence and shedding during childbirth, thereby reducing the need for caesarean section.
Herpes viruses typically infect the oral or genital mucosa. When herpes affects the mouth, it causes the typical "cold sores," which are painful sores or blisters that form on the lips, mouth, or gums. Prior to the development of the blisters, there may be a prodrome (early symptoms indicating onset of a particular disease) consisting of an itching, burning, or tingling sensation in the affected area. The virus remains dormant in the nervous system throughout life, and this is the reason that cold sores often recur in the same location.
HSV-2 is commonly referred to as genital herpes because it usually causes cold sores to erupt around the genitalia. In fact, genital herpes is the No. 1 cause of genital ulcers worldwide, according to the Centers for Disease Control and Prevention (CDC), and affects up to 1 in 3 adults (although most who are infected don’t even know it). (5) Both types of herpes viruses are highly contagious, and both can cause cold sores in either area of the body (or sometimes both).
The most common reason that people develop cold sores on their mouths is due to becoming infected with HSV-1. (4) HSV-1 usually causes cold sore breakouts around the lips or mouth, or what some people describe as “fever blisters.” Someone can become infected with HSV-1 starting as a child, and then the virus can lay dormant in the body until the immune system is weakened, at which point symptoms can surface.
Worldwide rates of either HSV-1 or HSV-2 are between 60% and 95% in adults. HSV-1 is usually acquired during childhood. Rates of both increase as people age. Rates of HSV-1 are between 70% and 80% in populations of low socioeconomic status and 40% to 60% in populations of improved socioeconomic status. An estimated 536 million people worldwide (16% of the population) were infected with HSV-2 as of 2003 with greater rates among women and those in the developing world. Most people with HSV-2 do not realize that they are infected. The name is from Greek: ἕρπης herpēs which means "to creep", referring to spreading blisters. The name does not refer to latency.
Genital herpes is passed on by skin-to-skin contact during vaginal, oral or anal sex, or by sharing sex toys. You can get genital herpes even if there are no visible sores or blisters, and once you have the virus, there is no cure. 'Herpes is more likely to be passed on just before, during or straight after an outbreak, as herpes blisters and sores are highly infectious,' says O’Sullivan.