About Hepatitis

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Symptoms of Hepatitis A Infection

What are the symptoms of hepatitis A infection?

Hepatitis A may cause no symptoms at all when it is contracted, especially in children. [12] Asymptomatic individuals will only know they were infected (and have become immune, given that you can only get hepatitis A once) by getting a blood test later in life. [17]

Approximately 10 to 12 days after exposure, HAV is present in blood and is excreted via the biliary system into the feces. [7, 11]  Although the virus is present in the blood, its concentration is much higher in feces. [11]  HAV excretion begins to decline at the onset of clinical illness, and decreases significantly by 7 to 10 days after onset of symptoms. [11]  Most infected persons no longer excrete virus in the feces by the third week of illness; children may excrete HAV longer than adults. [11, 20]

Seventy percent of hepatitis A infections in children younger than six years of age are asymptomatic; in older children and adults, infection tends to be symptomatic with more than 70% of those infected developing jaundice. [7]  Symptoms typically begin about 28 days after contracting HAV, but can begin as early as 15 days or as late as 50 days after exposure. [7, 11, 12] The symptoms include muscle aches, headache, anorexia (loss of appetite), abdominal discomfort, fever, and malaise. [[7, 11, 17]

After a few days of typical symptoms, jaundice (also termed “icterus”) sets in. [11, 17] Jaundice is a yellowing of the skin, eyes and mucous membranes that occurs because bile flows poorly through the liver and backs up into the blood. [17] The urine will also turn dark with bile and the stool light or clay-colored from lack of bile. [7, 11, 17] When jaundice sets in, initial symptoms such as fever and headache begin to subside. [17]

In general, symptoms usually last less than 2 months, although 10% to 15% of symptomatic persons have prolonged or relapsing disease for up to 6 months. [13, 14] It is not unusual, however, for blood tests to remain abnormal for six months or more. [11] The jaundice so commonly associated with hepatitis A can also linger for a prolonged period in some infected persons—sometimes as long as eight months or more. [11, 17] Additionally, pruritus, or severe “itchiness” of the skin, can persist for several months after the onset of symptoms. These conditions are frequently accompanied by diarrhea, anorexia, and fatigue. [7, 17]

Relapse is possible with hepatitis A, typically within three months of the initial onset of symptoms. [14] Although relapse is more common in children, it does occur with some regularity in adults. [11, 14] The vast majority of persons who are infected with hepatitis A fully recover, and do not develop chronic hepatitis. [17]  Persons do not carry hepatitis A long-term as with hepatitis B and C. [5, 7]


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