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Laboratory Medicine

Test catalogue

Quantiferon Tb Gold

Test Name

Quantiferon Tb Gold

Specimen Type / Requirements

Container Type = Specialized Tubes (QFT TB Kit) Required For Testing

Call Microbiology at 5381 to obtain kit

Note: Outpatient Tb Quantiferon request are done at Dynacare.

Specimen Handling

Collection Instructions: prior arrangement Ensure both requisitions and samples are labelled properly. Requisition must be completed with all of the required information. Immediately after filling tubes invert tubes ten (10) times just firmly enough to ensure the entire surface of the tube is coated with blood. Over-energetic shaking may cause gel disruption and could lead to aberrant results.

Write your initials, date and time of collection on the collection label or requisition.

Labotatory Staff Instructions: Tubes should be between 17–25°C at time of blood filling. Tubes MUST BE received in the Sick Kids Microbiology Laboratory within 12 hours of collection.

Specimens that CANNOT meet the 12 hour transport time (from time of Collection), inculation and centrifugation of tubes prior to submission is required.

Rejection Criteria: Tubes other than those provided in the collection kit. Unlabeled or samples of non sufficient quantity.

Transportation: DO NOT refrigerate or freeze samples, ship at room temperature.

Required Documentation

Turnaround Time (TAT)

2 weeks

Test Utilization

Reference Value

Positive Test Result: > 0.350 IU/mL

Negative Test Result: < 0.350 IU/mL

Indeterminate Result: Due to high Nil value or low mitogen response

Test code




Testing Location


Other Information

Last Updated: March 04, 2020