Herpesviruses

Herpesviruses are a large family of DNA viruses that cause diseases in animals, including humans. The members of this family are also known as herpesviridae. They are characterized by their ability to remain latent in the body over long periods.

Overview

Herpesviruses all share a common structure—all herpesviruses are composed of relatively large double-stranded, linear DNA genomes encased within an icosahedral protein cage called the capsid, which is itself wrapped in a lipid bilayer called the envelope. The envelope is studded with proteins that the virus uses to bind to, and enter, host cells.

Types of Herpesviruses

There are eight types of herpesviruses that can infect humans, including:

• Herpes simplex virus 1 (HSV-1)
• Herpes simplex virus 2 (HSV-2)
• Varicella-zoster virus (VZV)
• Epstein-Barr virus (EBV)
• Human cytomegalovirus (HCMV)
• Human herpesvirus 6 (HHV-6)
• Human herpesvirus 7 (HHV-7)
• Kaposi's sarcoma-associated herpesvirus (KSHV)

Diseases Caused by Herpesviruses

Herpesviruses can cause several diseases in humans, including:

• Herpes simplex: Caused by HSV-1 and HSV-2
• Chickenpox and shingles: Caused by VZV
• Infectious mononucleosis: Caused by EBV
• Cytomegalovirus infection: Caused by HCMV
• Roseola: Caused by HHV-6 and HHV-7
• Kaposi's sarcoma: Caused by KSHV

Treatment

Treatment for herpesvirus infections includes antiviral medications like acyclovir, valacyclovir, and famciclovir. These medications can help to reduce the severity and frequency of symptoms, but they cannot cure the infection.

Prevention

Prevention of herpesvirus infections can be achieved through the use of vaccines for some types of herpesviruses, like VZV. For other types of herpesviruses, prevention strategies include avoiding contact with infected individuals and practicing safe sex.