Test Directory

TB Quantiferon Gold 4 tube Assay

Containers - Adult

TB Quantiferon 4 tube Assay.JPG
TB Quantiferon 4 tube Assay
Volume Range

​0.8 - 1.0 ml

Containers - Child

TB Quantiferon 4 tube Assay.JPG
TB Quantiferon 4 tube Assay
Volume Range

​0.8 -1.0 ml

Reference ranges

​Refer to printed result report.

Laboratory Site

RIE
51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA
Telephone (Bacteriology): 0131 242 6021 OOH Bleep 2900

Transport arrangements

​Inter-site van shuttle service, GP van service, External hospital van service, Couriers, Hospital porter collection (refer to collection times posted in wards / departments), Hospital Pneumatic Tube System (PTS)

Sample storage arrangements

​Specimen transport arrangements must be in accordance with current postal and transport regulations. Samples should be transported to the laboratory without delay. If processing is delayed, store at room temperature (19-23 oC). Patient samples can be transported at ambient temperature.

Special instructions for collection

​To order tubes via PECOS the product number is 622222.

Gently invert each tube 10 times. Samples should reach laboratory within 16 hours of being taken. Alternatively, samples should be incubated upright at 37oC +- 1 for 16-24 hours. After incubation, samples may be held between 4 and 27oC for up to 3 days prior to centrifugation.

Clinical samples must be collected into leak-proof containers and placed into a sealed bag with absorbent material. Patient samples must be individually packaged and not mixed with other patient samples. Any appropriate hazard labelling should be clearly visible on the sample bag / sample.

How to request

​Use appropriate request form or TRAK. Forms must be fully completed with Patient Identifier Number (CHI), Forename, Surname, Date of Birth, Gender and Location of patient (hospital and ward or primary care centre).

Availability

​Weekdays for receipt of specimens 08.30 – 19.00 and Saturday 09.00 – 14.00.

Anticipated turnaround

​10 days

What happens if the result is positive or abnormal

Positive results are notified to the TB Bacteriologist and are available in the patient’s records.

Static information/disclaimer

​False negative results may occur for a variety of reasons including: inappropriate timing of sample collection, inappropriate sample type, inappropriate sample storage and incorrect volume of blood ine each Quantiferon collection tube. New and emerging variants may also occur which may not be detected by specific assays. Towards the limit of detection of an assay sampling variation will result in lower reproducibility. Haemolysed or lipaemic samples can also cause interference with assay results.

General additional information

Only indicated for diagnosis of latent TB infection.

Please contact Lothian.microbiologyoffice@nhs.net for all non-urgent clinical enquiries.