Candida Antigen (Serum) – Quantitative

When Is This Test Used?

Your doctor may order this test if you have symptoms like fever, fatigue, or unexplained infections, especially if you have weakened immunity (e.g., from chemotherapy, HIV, or long-term steroids). It’s also used in patients with persistent fevers of unknown origin or those with invasive procedures (e.g., central lines).

What Does a Positive Result Mean?

A positive result suggests *Candida* antigens are circulating in your blood, which can indicate a systemic infection. This doesn’t always mean you have an active infection—your doctor will assess symptoms and other tests (like blood cultures) to guide treatment.

What If I Have a Negative Result?

A negative result means no detectable *Candida* antigens were found in this sample, but it doesn’t rule out infection entirely. If you have symptoms, further testing (e.g., cultures) may be needed to confirm or rule out other causes.

Common Causes of False Positives or Negatives

False positives may occur with other infections or immune responses. False negatives can happen if the infection is localized (e.g., in the mouth or gut) or if the test was taken too early. Your doctor will consider timing and clinical context.