Advanced Diagnostic Laboratories

Collect

Serum separator tube or a red top tube.

Specimen Preparation

Separate serum from cells immediately by centrifugation and aliquot into a polypropylene or similar plastic tube.
Preferred volume: 1 mL serum

Pediatric Collection

Minimum Volume: 0.5mL serum

Unacceptable Conditions

Plasma

Storage Transport Temp

Ship within 48 hours of collection if shipping at ambient temperature.
Preferably ship samples refrigerated or frozen on dry ice in a well insulated container.
Send serum Priority Overnight via FedEx.

Stability

48 hours amibient. 7 days refrigerated, 1 year at -20°C or below. Avoid repeated freeze thaw cycles.

Notes

Note: 0.25 mL serum is required for one precipitin. Add 0.1 mL for each additional precipitin ordered.

Performed

Monday

Methodology

Immunodiffusion

Reported

up to 12 days

Department

Precipitins

Synonyms

Immunodiffusion (Precipitin Pigeon Droppings IgG);EB2

Reference Interval

Negative

Interpretation

Precipitating IgG antibodies are often present in serum of patients with hypersensitivity pneumonitis (HP) due to exposure to enviromental antigens. The serum precipitin test assists in the diagnosis of HP.

CPT Code

86331