Hepatitis A : OSH Answers

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how is hepatitis a transmitted


Hepatitis A - Wikipedia, the free encyclopedia

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** Hepatitis A **

From Wikipedia, the free encyclopedia
Jump to: navigation, search

Hepatitis A
/Classification and external resources/

Hepatitis A induced jaundice
ICD-10 B15
ICD-9 070.0, 070.1
DiseasesDB 5757
MedlinePlus 000278
eMedicine med/991 ped/977
MeSH D006506

*Hepatitis A* (formerly known as /infectious hepatitis/) is an acute
infectious disease of the liver caused by the hepatitis A virus (HAV),^[1]
an RNA virus, usually spread by the fecal-oral route; transmitted
person-to-person by ingestion of contaminated food or water or through
direct contact with an infectious person. Tens of millions of individuals
worldwide are estimated to become infected with HAV each year.^[2] The time
between infection and the appearance of the symptoms (the incubation
period) is between two and six weeks and the average incubation period is
28 days.^[3]

In developing countries, and in regions with poor hygiene standards, the
incidence of infection with this virus is high^[4] and the illness is
usually contracted in early childhood. As incomes rise and access to clean
water increases, the incidence of HAV decreases.^[5] Hepatitis A infection
causes no clinical signs and symptoms in over 90% of infected children and
since the infection confers lifelong immunity, the disease is of no special
significance to those infected early in life. In Europe, the United States
and other industrialized countries, on the other hand, the infection is
contracted primarily by susceptible young adults, most of whom are infected
with the virus during trips to countries with a high incidence of the
disease^[3] or through contact with infectious persons.

HAV infection produces a self-limited disease that does not result in
chronic infection or chronic liver disease. However, 10–15% of
patients might experience a relapse of symptoms during the 6 months after
acute illness. Acute


Source: en.wikipedia.org/wiki/Hepatitis_A

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