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Herpes simplex, often known simply as herpes, is a viral infection caused by the herpes simplex virus. [5] Herpes infections are categorized by the area of the body that is infected. The two major types of herpes are oral herpes and genital herpes, though other forms also exist. Oral herpes involves the face or mouth.
Genital herpes is a herpes infection of the genitals caused by the herpes simplex virus (HSV). [1] Most people either have no or mild symptoms and thus do not know they are infected. [ 1 ] When symptoms do occur, they typically include small blisters that break open to form painful ulcers . [ 1 ]
Herpes virus DNA contains a gene for a protein called ICP4, which is an important transactivator of genes associated with lytic infection in HSV-1. [47] Elements surrounding the gene for ICP4 bind a protein known as the human neuronal protein neuronal restrictive silencing factor (NRSF) or human repressor element silencing transcription factor ...
Schematic drawing of a Herpesviridae virion. All members of the Herpesviridae share a common structure; a relatively large, monopartite, double-stranded, linear DNA genome encoding 100–200 genes encased within an icosahedral protein cage (with T=16 symmetry) called the capsid, which is itself wrapped in a protein layer called the tegument containing both viral proteins and viral mRNAs and a ...
Herpes simplex virus 1 can be classified into six clades. [3] Four of these occur in East Africa, one in East Asia and one in Europe and North America. This suggests that the virus may have originated in East Africa. The most recent common ancestor of the Eurasian strains appears to have evolved ~60,000 years ago. [4]
Herpes simplex virus 2 infects humans, most often as genital herpes. In the United States more than one in six people have the virus. [4] It is primarily a sexually transmitted infection. [5] Herpes simplex virus 2 tends to reside in the sacral ganglia. Herpes simplex virus 2 is periodically shed in the human genital tract, most often ...
Herpes virus may refer to: Any member of the large family of DNA viruses known as Herpesviridae. Human herpesviruses, nine types of herpesviruses that can cause diseases in humans Herpes simplex virus 1 and 2, responsible for herpes simplex infections; Human alphaherpesvirus 3, also called varicella-zoster virus, responsible for chickenpox and ...
Common infections in humans caused by members of this order include cold sores, genital herpes, chickenpox, shingles, and glandular fever. Herpesvirales is the sole order in the class Herviviricetes, which is the sole class in the phylum Peploviricota.