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Temporary information (contagious erythema)

Last Updated December 5, 2024

Temporary information on Yokohama infectious diseases

Infectious erythema information

What is an infectious erythema?

It is an infectious disease caused by human pulbovirus B19, which is also called "apple disease" because both cheeks turn red like apples. It often occurs from spring to early summer. About 7 to 10 days after the cold-like symptom, erythema (the skin becomes red) appears on both cheeks, followed by a mesh or lace-like erythema on the limbs. It is a mild infection that spreads mainly in children, but when infected early in pregnancy, it can cause miscarriages and abnormalities in the fetus. In addition, about 25% of people have subclinical infections that do not have symptoms even if they are infected.

Prevention and Measures

It is droplet infection (cough, sneezing, etc.) and contact infection (by touching the mucous membranes of the mouth and eyes with the hand that touches the droplets of the infected person).
The incubation period is 4 to 15 days.
Hand washing and cough etiquette are important for prevention. Since alcohol is difficult to work, sodium hypochlorite is used for environmental disinfection such as toys that are touched on a daily basis.

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Inquiries to this page

Infectious Diseases and Epidemiology Information Division, Medical Care Bureau Institute of Health

Telephone: 045-370-9237

Telephone: 045-370-9237

Fax: 045-370-8462

Email address: ir-eiken@city.yokohama.lg.jp

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Page ID: 110-608-617

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