Precipitins, Avian (Budgie, Pigeon)
Code:
AVIAN
Sample Type:
2mL Serum (Gel 5mL Yellow tube)
Ref Ranges/Units:
mg/L
< 40 mg/L is negative. Reference range established by Sheffield PRU and verified in-house
Turnaround:
10-14 days
Frequency of Analysis: Every 2 weeks
Special Precautions/Comments:
Method: Fluoresence Enzyme Immunoassay (FEIA). Calibration: WHO IRP 67/86 for IgG. EQA Scheme: UK NEQAS scheme for Antibodies to Fungal and Related Antigens. IQC: In house preparation
Interferences: None known
Interpretation: < 40 mg/L NEGATIVE. > 40 mg/L POSITIVE
Additional Information:
Indication: Bird/pigeon fanciers lung, Extrinsic allergic alveolitis (EAA).
Background Information: This assay is a useful adjunct to the diagnosis of diseases associated with the inhalation of avian antigen. These diseases are known variously as pigeon, budgerigar, or bird fanciers lung, depending on the source of exposure. These diseases form part of a group of diseases termed extrinsic allergic alveolitis (EAA). EAA is characterised by interstitial and alveolar inflammation [2]. The presence of IgG precipitating antibodies in the serum of affected patients is regarded as evidence of inhalational exposure to these antigens [1]. These antibodies indicate exposure to, and a potential to respond to subsequent antigen inhalation. Upon exposure, macrophages, plasma cells and T lymphocytes infiltrate into the lungs. There is persistence of inflammation until exposure to the antigen is stopped [2]. Symptoms include recurrent fevers, myalgia, chills, cough and breathlessness [3].
References: Ohtani Y, et al. Clinical features of recurrent and insidious chronic bird fancier’s lung. Ann Allergy Asthma Immunol. 2003. 90(6):604-610. [Ref 1] Mcsharry C, et al. Takes your breath away – the immunology of allergy alveolitis. Clin Exp Imm. 2002. 128:3-9. [Ref 2] Calvert JE, et al. Pigeon fanciers’ lung: a complex disease? Clin Exp Allergy. 1999. 29 (2):166-175. [Ref 3]
Telephone Gateshead Lab: 0191.4456499 Option 4, Option 1