Biotinidase Test

Biotinidase is an enzyme that helps the body recycle and use the nutrient biotin. A Biotinidase quantitative blood test measures the level of biotinidase in the blood. It is used to diagnose and monitor biotinidase deficiency, which is a rare disorder that can lead to a variety of health problems if left untreated.

Pre-test preparation:
There is no specific preparation required for this test.

Testing method:
A blood sample is taken and sent to a laboratory for analysis.

Common symptoms that may prompt a healthcare provider to prescribe a biotinidase quantitative blood test include:
Seizures
Skin rash
Alopecia (hair loss)
Neurological symptoms such as ataxia (lack of muscle coordination), developmental delays, and hearing loss
Gastrointestinal symptoms such as vomiting and diarrhea

Diagnosis:
Low levels of biotinidase in the blood can indicate a deficiency of the enzyme. Biotinidase deficiency is an inherited disorder and can be diagnosed at birth or later in life.

Reference range:
Normal values for biotinidase levels in the blood vary depending on the laboratory, but generally range from 10 to 60 nanograms per milliliter (ng/mL).

It’s important to note that the test results should be interpreted in the context of the patient’s clinical presentation and other test results. A single test result should not be used as the sole basis for diagnosis and treatment decisions. A qualified healthcare professional should interpret the test results and give you a proper diagnosis. Additionally, other biochemical and genetic tests may be used to confirm the diagnosis of biotinidase deficiency.