Antigen Antibody Screening Test for Infectious Agent (Serum/Plasma)
This test checks for antibodies in your blood that may indicate past or current exposure to certain infectious agents. It helps identify conditions like infections, immune responses, or previous vaccinations.
["This screening helps determine if you’ve been exposed to or have immunity against specific pathogens."]
Key facts at a glance
- LOINC
- 22086-3
- Short code
- ASPNAB
- Synonyms
- A niger Ab Ser Ql
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or red-top tube without anticoagulant
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Enzyme Immunoassay (EIA) or Immunofluorescence Assay (IFA) for detection of Aspergillus niger-specific IgG antibodies
- CPT
- 86606
- SNOMED
- 122793009
- Specimen volume
- 1-2 mL of serum
- Stability
- Stable for 7 days at 2-8°C; for longer storage, freeze at -20°C or below
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 24–72 hours
- Order
- routine
What This Test Measures
The test detects specific antibodies (proteins produced by your immune system) that target particular infectious agents. These antibodies can appear after exposure to a virus, bacteria, or other pathogens, or after vaccination. The method used may involve immunoassay techniques to identify these antibodies in your serum or plasma sample.
Why It’s Ordered
Doctors may order this test to diagnose infections, evaluate immune responses, assess vaccination status, or screen for conditions like HIV, hepatitis, or other viral/bacterial exposures. It can also be used in research or pre-transfusion screening to check for infectious diseases.
Sample Collection and Preparation
A blood sample is drawn from a vein, typically in your arm. The blood is processed to separate serum (liquid part after clotting) or plasma (liquid part before clotting). This sample is then tested in a lab using specialized equipment to detect the presence of antibodies.
Common Uses and Clinical Contexts
This test is commonly used in routine health checks, pre-surgery evaluations, travel-related screening, or when monitoring chronic conditions. It can also be part of diagnostic workups for unexplained symptoms like fever, fatigue, or unexplained infections.
Reference range
Negative: No detectable Aspergillus niger antibodies; Positive: Presence of Aspergillus niger IgG antibodies detected, suggesting prior exposure or current infection. Titers and clinical correlation required for interpretation.N/A
No special preparation required. Fasting is not necessary for antibody detection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Infectious Disease Screen (Serum/Plasma)
Frequently asked questions
How long will it take to get my results?
What does a positive result mean?
Can I fast before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy