DNase-B Antibody Test
The DNase-B antibody test measures antibodies to DNase-B, a substance produced by streptococcus bacteria, in a blood sample. Quest describes it as a test used to document recent streptococcal infection.
About this test
DNase-B is a substance produced by streptococcus bacteria, and this test measures the level of antibodies the body has made against it in a serum sample. The sample is analyzed using nephelometry, a light-scattering method used to measure antibody concentration.
Quest also lists this test under the name Deoxyribonuclease B Antibody, which refers to the same DNase-B antibody measurement. A single antibody level, by itself, does not describe the timing or severity of the infection it followed; a clinician places it alongside symptoms and history when documenting a recent streptococcal illness.
Test details
| Collection | Quest patient service center |
|---|
Quest resources
Additional details
What this test looks at
The test reports one value: the level of DNase-B antibody in serum, measured by nephelometry. A clinician reads this alongside symptoms and history when trying to document whether a recent streptococcal infection took place.
This test isn't part of the Celio Health store at the moment, so it can't be ordered or requested here. The test menu lists everything that can.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does the DNase-B antibody test measure?
It measures antibodies to DNase-B, a substance produced by streptococcus bacteria, in a serum sample. Quest describes the test as one used to document recent streptococcal infection.
How is the sample collected?
The test uses a serum sample from a routine blood draw, analyzed using nephelometry.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
Does a positive result mean an infection is happening right now?
Not necessarily. The test documents a recent streptococcal infection based on antibody response, which a clinician interprets alongside symptoms and history rather than as proof of a current infection.