Aspergillus IgG Test: 

Test Details:

The Aspergillus IgG test detects IgG antibodies against Aspergillus fumigatus, a common mold. This test is primarily used to diagnose chronic and invasive Aspergillus infections, rather than allergic reactions.

• Sample Type: Blood sample (serum)
• Test Method: Immunoassay (ELISA, Immunoblot, or ImmunoCAP)
• Purpose:
  • Diagnose Chronic Pulmonary Aspergillosis (CPA)
  • Detect Aspergillus-related lung infections in immunocompromised individuals
  • Differentiate fungal infections from bacterial or viral respiratory illnesses

Precautions Before the Test:

✅ Fasting: Not required
✅ Medications:

• Inform your doctor about antibiotics, antifungals, immunosuppressants, or corticosteroids, as they may affect immune response.
  ✅ Health Conditions:
• Chronic lung diseases (e.g., tuberculosis, COPD, cystic fibrosis) may influence Aspergillus IgG levels.
  ✅ Recent Exposure:
• Living in moldy or humid environments can contribute to positive results.

Interpreting Results:

🔹 Negative: No significant exposure or infection.
🔹 Borderline: Possible early-stage or mild exposure; further testing may be needed.
🔹 Positive: Suggests Chronic Pulmonary Aspergillosis (CPA), Aspergilloma (fungal ball), or invasive Aspergillosis (clinical correlation required).

📌 Additional Notes:

• Aspergillus IgG is different from Aspergillus IgE; IgG is linked to chronic infection, while IgE indicates allergic responses (e.g., ABPA).
• CT scans, sputum cultures, and bronchoscopy may be needed for a definitive diagnosis.
• Antifungal treatment (e.g., itraconazole, voriconazole) is typically required for CPA or invasive cases.