Galactomannan Antigen

Diagnostic Use

Galactomannan (GMAG) is a component of the Aspergillus cell wall that can be detected in the tissues and fluids (typically serum and bronchial washings) of patients with invasive aspergillosis (IA).

Department

Microbiology - Serology

Delphic Registration Code

GMAG

Laboratory Handling

Laboratory

Sample must be frozen within 48 hrs of collecton. Referred to Waikato Hospital

Turnaround Time

2 weeks

Specimen Type

• Serum
• Bronchial Washing

Specimen Requirements

Tube/Container Type:

Preferred

• Serum (Red Cap)

Acceptable

• Pottle
• Serum (Red Cap)
• SST II (Gold Cap)

Preferred Sample Volume (ml)

10.0

Minimum Sample Volume (ml)

5.0

No of Samples Required

1

Additional Specimen Information

Minimum volume of 1 mL of serum or bronchial washings

Aliquot Instructions

Sample Type

• Serum

Minimum Volume (ml)

0.8

Transport to Lab

Chilled (2 - 8 degrees Celsius)
If overnight - Frozen

Additional Referral/Aliquot Information

Minimum volume of 1 mL of serum or bronchial washings.
Sample must be frozen within 48 hours of collection.

Interpretation

Two consecutive Reactive results in the context of appropriate clinical features suggests possible Invasive Aspergillosis.

Reference Intervals

Reference Range = Index  0-0.5

Galactomannan Index <0.5 is reported as Negative

Galactomannan Index >/= 0.5 is reported as Reactive

Test Method

Referred to Waikato Hospital

Contact Canterbury Health Laboratories on +64 3 364 0484 or email LabInfo@cdhb.health.nz

Uncertainty of measurement <30%

Referred to Waikato

Contact Information

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