Galactomannan (Serum or Plasma)

What Is Galactomannan Used For?

Galactomannan is primarily used to detect infections caused by *Aspergillus* fungi, which can affect the lungs, bloodstream, or other organs. It is often ordered when symptoms like fever, cough, or breathing difficulties suggest a fungal infection, especially in high-risk groups such as immunocompromised individuals or those with chronic lung diseases.

How Is the Test Performed?

A blood sample is taken from a vein in your arm. The sample is then processed to measure galactomannan levels using a specialized immunoassay method. This test can also be performed on other body fluids like cerebrospinal fluid if needed.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you have symptoms of a fungal infection, such as persistent cough, chest pain, or unexplained fever. It is also used in monitoring patients who are at higher risk, such as those undergoing chemotherapy, transplant recipients, or individuals with weakened immune systems.

What Do Results Mean?

Positive results suggest the presence of *Aspergillus* infection, which may require further medical evaluation and treatment. Negative results do not definitively rule out infection, so other diagnostic tests may still be needed.