Collect in a plain red top or SST tube.
Separate serum from cells immediately by centrifugation and aliquot into a polypropylene or similar plastic tube.
Preferred volume: 1 mL serum
Minimum Volume: 0.5mL serum
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.
48 hours amibient. 7 days refrigerated, 1 year at -20°C or below. Avoid repeated freeze thaw cycles.
Note: 0.25 mL serum is required for one precipitin. Add 0.1 mL for each additional precipitin ordered.
up to 12 days
Immunodiffusion (Precipitin Hay IgG)
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.