Aspergillus (Galactomannan Ag),Bal

A BAL galactomannan test is advised when invasive fungal lung infection is suspected, especially in immunocompromised patients with fever not responding to antibiotics, cough, breathlessness, chest pain, or coughing up blood, or new lung nodules on a CT scan. It is common in leukemia, transplant, neutropenia, or severe ICU illness.

A BAL galactomannan test requires a bronchoscopy, so fast for 6–8 hours beforehand. Inform your doctor about any blood thinners, bleeding disorders, allergies, or breathing problems. Also mention any antifungal medicines, as they can reduce test sensitivity. Since sedation is used, arrange for someone to accompany you home.

Yes, fasting is required for a BAL galactomannan test. Because the sample is collected during a bronchoscopy under sedation, you should fast for 6–8 hours beforehand, avoiding food and drinks unless your doctor allows sips of water. Follow your hospital’s specific instructions.