What should you know about hepatitis A surface antigen?

Hepatitis A is a liver infection caused by a virus. A test result cannot be interpreted safely from the label alone: your clinician considers the exact test, when exposure may have occurred, symptoms, examination findings and other blood tests. A liver function test can show how the liver is responding, while antibody testing may help distinguish recent infection from past immunity or vaccination. Symptoms can include nausea, poor appetite, feeling generally unwell and dark urine, although some people have few or no symptoms.

If infection is suspected, careful handwashing and avoiding food preparation for other people can reduce spread. Do not share personal items that may be contaminated. Your clinician can explain whether close contacts need advice or vaccination.

Arrange a clinical review rather than trying to interpret the result in isolation. Take the report, a list of medicines and supplements, and details of possible food, water or close-contact exposure. Rest, drink fluids and choose small meals if nausea or appetite loss makes eating difficult. Ask before taking medicines or supplements that may affect the liver, and avoid alcohol while your clinician assesses you.

Follow-up may include repeat blood tests and symptom monitoring. Vaccination is a prevention option for people who have not developed protection; discuss Hepatitis A Vaccination with a clinician, especially after a possible exposure or before travel.

Seek prompt medical advice for yellowing of the skin or eyes, worsening dark urine, repeated vomiting, inability to keep fluids down, increasing abdominal pain, unusual sleepiness or confusion. These signs need assessment because liver illness can become more serious. If you feel severely unwell, faint or confused, use urgent medical services.

Ask which hepatitis A test was performed, what your result means alongside your symptoms, whether a liver function test or repeat sample is needed, how long to avoid preparing food for others, and whether household or sexual contacts need vaccination advice.