What should you know about serological test for dengue?

The test uses a blood sample to look for immune markers linked with dengue. Antibodies may take time to appear, so an early negative result does not always exclude a recent infection. A clinician may consider a repeat sample or another type of dengue test when the illness is still developing. Results can be described as positive, negative, or unclear, and the meaning depends on when fever began, previous dengue exposure, and the symptoms present.

Dengue commonly presents with fever, headache, muscle aches, joint pain or chills. Easy bruising or unusual bleeding needs prompt medical attention. A result should be read alongside an examination rather than treated as a diagnosis in isolation.

Tell the clinician when your fever or other symptoms started, whether you have travelled or lived in an area where dengue occurs, and which medicines or supplements you use. Follow the hydration and monitoring advice you receive. Do not start or stop medicines based only on the laboratory report. Keep the result available if you need a GP Consultation, especially if symptoms change.

Seek urgent medical help for severe abdominal pain, repeated vomiting, faintness, confusion, breathing difficulty, cold or clammy skin, or bleeding from the nose, gums, urine or bowel. These warning signs can require assessment even if an earlier serology result was negative. Worsening weakness or inability to drink also warrants prompt review.

Ask which antibody or immune marker was measured, whether the sample was taken at the right stage of illness, whether repeat testing is needed, and which warning symptoms should prompt immediate review.