Laboratory Test Information Guide

Details for Allergic Alveolitis Group,Serum

Test Name: Allergic Alveolitis Group,Serum
Alternate Name(s): Hypersensitivity Pneumonitis Screen
Extrinsic Allergic Alveolitis Screen
Avian and Fungal IgG Precipitins
Laboratory: Clinical Immunology
Specimen Type: 5 mL Gold top Vacutainer tube or 6 mL Red top Vacutainer tube

0-2 yrs: Red 0.5pk.
2-10 yrs: 2 mL Red top
Collection Information: Collect blood aseptically in a Vacutainer tube.
Test Schedule: Batch Analysis
Turnaround time from when specimen
is received in testing laboratory:
10 days
Reference Range: Negative
Effective Date: 2010-01-11
Revised Date:  
Critical Value:  
Interpretive Comments: Tested for IgG precipitins to Aspergillus fumigatus, Micropolyspora faeni, Aureobasidium pullulans, Thermoactinomyces vulgaris and Pigeon serum.

No single laboratory test is diagnostic for hypersensitivity pneumontis (HP). Diagnosis is based on a complete environmental and clinical history supported chest x-ray, spirometry and in vitro immunologic tests.

Double diffusion (Ouchterlony) assays are typically used to determine antigen specific IgG antibodies. The appearance of precipitin arcs confirms the presence of precipitating antibodies to specific antigens and confirms exposure to the offending antigen(s). These antibodies may also be present in healthy individuals. However, upon repeated or prolonged exposures, high levels of precipitating IgG antibodies are typically observed.
Special Processing:  
Method of Analysis: Double diffusion
Critical Information Required:  
Storage & Shipment: 2 8oC for up to 7 days. For longer intervals, store at 20oC.

Transit time < 6 hr ambient temperature.
Transit time < 24 hours - keep chilled with ice packs.
Transit time > 24 hours - ship frozen.
System Codes: 
Referred To:  

Questions? Comments? Contact Laura Gopaul