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QuantiFERON® TB Gold In-Tube (QFT)

Updated

12/2/2016

Other Names Interferon Gamma Release Assay for tuberculosis (IGRA)
How to Order
Check the QFT box, under MYCOBACTERIUM, on the General Microbiology Request Form included in the Collection Kit. Complete the Time of Collection.
 
Notify the OSPHL of incoming specimen to ensure timely handling.

Availability
All clients
Methodology
Interferon-Gamma detection and quantification by ELISA in response to TB antigens
Performed
Daily on regular business days
Time to Reporting
2 to 4 working days after receipt of specimen
CPT Code
86480


Specimen Collection Details

Collection
Obtain a QFT collection kit from the laboratory and draw 1ml of blood into each of the 3 specimen tubes. Specimen tubes may be filled in any order. After filling the tubes, shake each tube 10 times to ensure the entire inner surface of the tube is coated in blood. (See comments)
Optimal Volume
1.0 ml per tube (1.0 ml line is printed on tube label)
Minimum Volume
0.8 ml  (max 1.2 ml)
Handling
Maintain all tubes at room temperature. Do
not centrifuge.
Transport
Tubes must be sent at room temperature and be received in the laboratory within 16 hours of collection, M - F, between 8:00AM and 5:00PM.
 
Do not collect or transport for receipt at the OSPHL on the business day before a holiday.
Rejection Criteria
Specimens not received by the OSPHL within 16 hours of specimen collection or specimens received the business day before a holiday.
 
Specimens are subject to the requirements of the OSPHL Specimen Submission Policy and Criteria, available at http://bit.ly/SpecimenCriteria.
Comments
Detailed instruction for collection and submission of QFT samples are printed on the back of the General Microbiology Request Form. For addition information or assistance, please contact the laboratory at 503-693-4100.