Galactomannan (serum or bronchoalveolar lavage fluid)

This test is referred to another lab outside our network
This does not affect where samples are sent and where your results are issued.
Galactomannan is a molecule found in the cell wall of some fungi such as Aspergillus species. Testing for the presence of galactomannan in the serum and/or bronchoalveolar lavage fluid may be aid the diagnosis of invasive fungal.

Samples are sent on to reference laboratory
Clinical details: 
A positive result may support a diagnosis of invasive aspergillosis (IA). Positive results should be considered in conjunction with other diagnostic procedures, such as microbiologic culture, histological examination of biopsy specimens, and radiographic evidence.

A negative result can may be helpful to rule out the diagnosis of IA in some situations.
Synonyms or keywords: 
Galactomannan, Aspergillus antigen
Sample type and Volume required: 
Serum galactomannan: 6-8 ml clotted blood Serum Separator Tube (Yellow top).
Bronchoalveolar lavage fluid (BAL) galactomannan: 5-10 mls in a sterile universal container
Turnaround time: 
7-10 days
Storage and transport: 
Send samples to Central Specimen reception at Guys and at St Thomas's Hospital.
Infection Sciences Department at St Thomas' Hospital
020 7188 8008
St Thomas' Hospital
North Wing - 5th Floor
Westminster Bridge Road
London SE1 7EH
Core opening hours: Monday-Friday 0900-1730

For clinical advice or interpretation of results, please contact the laboratory in the first instance.

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Last updated: 24/01/2020