Viral skin infections

Several common childhood viral infections cause widespread exanthems (rashes):

• Measles (morbilli)
• German measles (rubella)
• Chickenpox (varicella)
• Erythema infectiosum and papular purpuric gloves and socks syndrome (parvovirus)
• Roseola (erythema subitum, due to herpesvirus 6 and 7)
• Infectious mononucleosis or glandular fever (Ebstein Barr virus)
• Enterovirus infections

Other viral syndromes include:

• Pityriasis rosea, at present of unknown cause
• Hand foot and mouth disease (enteroviral vesicular stomatitis), due to coxsackie infection. More widespread vesicular eruptions can also be due to enterovirus.
• Infantile papular acrodermatitis (Gianotti-Crosti syndrome) is most often caused by infectious mononucleosis (Epstein Barr Virus) or hepatitis B.
• Laterothoracic exanthem (asymmetric periflexural exanthem of childhood or APEC), cause uncertain
• Haemorrhagic fevers caused by togavirus, bunyavirus and arenavirus are potentially fatal, with bleeding into the skin
• Smallpox, a deadly disease hopefully now eradicated by widespread vaccination
• Cowpox
• Monkeypox, a newly emerged pox virus present in the Congo
• Chikungunya fever, dengue and dengue haemorrhagic fever and zika fever (due to arboviruses).
• Other haemorrhagic fevers include Crimean-Congo haemorrhagic fever (nairovirus), Lassa fever (arenavirus), Ebola haemorrhagic fever and Marburg haemorrhagic fever (filovirus).
• Epidermodysplasia verruciformis is a genetic disorder in which there are numerous viral warts and predisposition to skin cancer
• Various skin complaints are more common with Human Immunodeficiency Virus (HIV) infections (AIDS) including acute human immunodeficiency virus infection syndrome and Kaposi sarcoma (which is due to infection with herpesvirus 8)
• Rickettsial diseases are due to organisms classified between bacteria and viruses.
• Yellow fever is a serious flavivirus infection, which is characterised by yellow skin and eyes due to jaundice.

Localised skin conditions caused by viral infections include:

• Herpes simplex (cold sores and genital herpes), eczema herpeticum
• Herpes zoster (shingles), including Ramsay Hunt syndrome
• Herpangina / vesicular stomatitis (oral ulcers)
• Molluscum contagiosum
• Viral warts (verrucas, genital warts or condylomas and squamous cell papillomas)
• Orf
• Milker's nodules

In the future, we expect to classify more skin conditions as viral in origin as more sophisticated tests for viral particles become available.

Viral infections including viral hepatitis sometimes give rise to:

• Erythema multiforme
• Erythema nodosum
• Kawasaki disease