What should you know about hepatitis A laboratory test?

A clinician may request blood testing when symptoms, contact with hepatitis A, travel history or liver results raise concern. Some tests look for immune markers linked with a recent infection; other blood results show how the liver is functioning. A result is not meaningful in isolation: the timing of exposure, symptoms and previous vaccination can affect interpretation.

Symptoms may include feeling generally unwell, nausea, loss of appetite or dark urine, although symptoms vary. A [Liver Function Test](/treatments/diagnostics-and-screening/liver-function-test/) checks liver-related blood markers but is different from a test that identifies hepatitis A itself. Read more about [Hepatitis A](/conditions/hepatitis-a/).

Follow the laboratory's instructions about food, medicines and sample collection. Tell the clinician when symptoms began, whether you may have been exposed, and whether you have received [Hepatitis A Vaccination](/treatments/preventive-care-and-vaccination/hepatitis-a-vaccination/). Until results and advice are clear, wash hands carefully, avoid preparing food for others if advised, and do not share personal items that may be contaminated.

Arrange prompt medical assessment for yellowing of the eyes or skin, dark urine with worsening illness, repeated vomiting, confusion, severe weakness or inability to keep fluids down. Seek emergency help for collapse, difficulty staying awake or severe abdominal pain. Testing should support an examination; do not wait for a result if you are becoming seriously unwell.

Ask which test is being ordered, what a positive or negative result could mean at this stage, whether repeat testing is needed, and how to reduce spread while waiting.