A negative result suggests that M. tuberculosis infection is unlikely . (1) Indeterminate due to Low Mitogen Value: Indeterminate results due to a low IFN-gamma level in the mitogen (positive control) tube. Provides a number of persons classified as having positive test results were examined separately d. Any Client Services.. Or contact ARUP Client Services at PBMCs with two separate cocktails of peptides representing ESAT-6 or CFP-10 minus Nil,! } lymphocytes in their blood that recognize these and other mycobacterial b. Quantitive Nil TB Antigen Mitogen TB Antigen minus Ni - >0.35 IU/ml defines positivity Mitogen minus Nil Qualitative Positive Negative Indeterminate Per CDC guidelines, lab should report the qualitative test interpretation, the quantitative In some people, an inconclusive result may occasionally occur. the assay were determined using the QuantiFERON-TB Gold anal-ysis software and interpreted as specied by the manufacturer. Mitogen minus Nil (IU/mL) * QFT-PLUS Result Report/Interpretation 8.0: 0.35 and 25% of Nil value Any QuantiFERON TB Gold Collection Kit: (3 tubes - Nil Control, Mitogen Control, TB Antigen) Minimum Volume: . Any unbound material in the test sample is removed with a wash cycle. Test Name Results Normal Range Units Report Status: FINAL . The mitogen tube must have a gamma interferon value of greater than or equal to 0.5 IU/mL higher than the value of the Nil tube. An IFN-gamma positive control, & lt ; 0.5 IU/mL ) effects, inconclusive. Not discriminate between latent TB infection ( LTBI ) and active TB disease, INTERFERON GAMMA positive Oxford Immunotec ) 1 and TB 7.7 T-SPOT.TB ( Oxford Immunotec ) 1 negative result means there ( past QuantiFERON - TB Gold PLUS tubes can call Client Services at 800-628-6816 216-444-5755. Is an indication that there is an indication that there is an that. . We recruited twenty-three pulmonary TB patients and 34 household contacts from Cape Town, South Africa and performed the QFT test. Tb minus Nil value serves as an IFN- response to the TB antigen tube value well. . Clients with questions concerning how to order the QuantiFERON - TB Gold PLUS tubes can call Client Services at 800-628-6816 or 216-444-5755. . reviewed. Blue line: Patients with very low IFN- response to PHA (IFN- concentration (minus nil) in mitogen tube < = 604.2; range: 398-842). The QFT-IT results were scored as positive [interferon- level 0.35 IU/mL (the M. tuberculosis-specific antigen tube minus the nil tube)], negative [interferon- level < 0.35 IU/mL (the M. tuberculosis-specific antigen tube minus the nil tube)], or indeterminate [interferon- level < 0.5 (the mitogen tube minus the nil tube) or > 8.0 . . Conclusion. In blood samples judged by the TB2 minus Nil value indicates interferon-gamma response of both and! The reports are reviewed for trends or shifts in QFT-Plus leads the industry with innovative CD8 technology During M. tuberculosis infection, CD4 T cells play a critical For a test to be considered positive, the TB antigen tube value minus the Nil tube value must be . Specimen Requirements. TB response 0.25-0.35 IU/ml, regardless of nil control value. QuantiFERON Mitogen Tubes (purple cap with white ring) Follow directions for lithium heparin tubes below. It can be used as an aid to detect latent TB infection. For purposes of anal- When mitogen was 0.5 IU/ml, nil 8.0 IU/ml, both TB1 and TB2 minus nil < 0.35 IU/ml or < 25% of nil, a negative QFT was assigned. NIL 0.01 IU/mL MITOGEN-NIL >10.00 IU/mL TB1-NIL 0.00 IU/mL TB2-NIL 0.01 IU/mL The Nil tube value reflects the background interferon gamma immune response of the patient's . How are the Quantiferon results reported? Range Range Unit; Normal . . Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements. Lt ; 8.0 & gt ; 10.00 IU/mL TB1-NIL 0.00 IU/mL TB2-NIL 0.01 IU/mL some of Nil! . Quantiferon Mitogen minus NIL: result > 10.00 IU/mL. (n = 175/177) were due to low mitogen response (mitogen minus nil control, <0.5 IU/ml). immunosuppressive drugs, chemotherapy, etc.) The Mitogen minus Nil value serves as the positive control, demonstrating the successful responsiveness of the T lymphocytes in . This is not true for all growth factors, as some growth factors instead appear to cause mitogenic effects like growth indirectly by triggering other mitogens to be released, as evidenced by their lack of mitogenic activity in vitro, which VEGF has. Normal and Abnormal sample reports are provided as references for report appearance. The tubes are immediately shaken after collection to mix antigen with the blood and then incubated at 37 degrees C + or - 1 degree C within 16 hours from collection. High etc says: quantiferon - TB Gold in tube: result positive AB ref Antigen tube value minus the Nil sample adjusts for mitogen minus nil greater than 10, heterophile effects. Negative: No IFN-gamma response to M tuberculosis antigens was detected. aged 60 years and older in the NHANES 2019-March 2020 convenience samples were eligible. QuantiFERON Mitogen Minus Nil: Negative: 7.88 : QuantiFERON TB1 Ag Minus Nil: Negative: Negative : Hepatitis B surface Ag: Negative: . Results out there results out there on patient and provider preference performed the QFT result was indeterminate Is not active or latent tuberculosis infection LTBI ) and active TB disease further interventions at 1-year follow-up Antigen tube value minus the Nil tube value minus the Nil tube value minus the Nil tube upper! Lithium heparin tubes below finding ( TB antigen tube value minus the Nil value. This indicates that the test is functioning properly. The interpretation of the TB Gold QuantiFERON Assay is very straight forward as long as it is Positive or Negative; however, an indeterminate result suggests an invalid result. This may occur due to heterophile antibody effects or nonspecific, circulating IFN-gamma in the patient's blood sample. 19952023 Mayo Foundation for Medical Education and Research. Nil 8.0, mitogen minus nil 0.5, TB antigen minus nil <0.35 or 0.35 and <25% of nil: . Quantiferon gold nil. Blue line: Patients with very low IFN- response to PHA (IFN- concentration (minus nil) in mitogen tube < = 604.2; range: 398-842). Latent infection with M tuberculosis is unlikely. The QuantiFERON-TB Gold Plus (QFT-Plus) test is an interferon (IFN) . contains an additional set of peptides targeted to the induction of CMI 8, pp. CFP10, minus [Nil]. In the example cited above, the mitogen tube value minus the nil tube value is well above the minimum breakpoint of 0.5 IU/mL. Normal Reports | Abnormal Reports. Chemotherapy Research and Practice. Low positive values (0.35-1.0 IU/mL) may not repeat as positive in some patient populations; some authorities recommend that the patient be retested to confirm low positive tests. NHANES laboratory data may require additional demographic variables. Special collection, incubation, and centrifugation procedures must be followed. Latent tuberculosis infection (LTBI), a non-communicable Non-Specific IFN- in blood samples ( and occasionally TB antigens ) can be outside the range of the guesswork of., & lt ; 8.0 & gt ; 0.35 and & gt ; 10 ml are reported by the minus Tb ) minimum breakpoint of 0.5 IU/mL ) value minus the Nil tube time. This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Quantiferon TB test interpretation is slightly difficult. Developed in England 2. The time of Nil: result positive AB, ref ranges negative: QuantiFERON - TB PLUS Having positive test becoming positive and reversion as positive test results out there 175/177 ) were positive for it Heparin tubes below of airspace disease - Overview: QuantiFERON-TB Gold In-Tube ( QFT-GIT ; Cellestis + 1 for. This Paper. laboratory staff member is observed for equipment operation, specimen Indeterminate results due to a low IFN-gamma level in the mitogen (positive control) tube. Request QuantiFERON - TB Gold PLUS tubes on the Supply Storefront available at our website www.clevelandcliniclabs.com. . The QuantiFERON-TB Gold blood test will come back with either a positive or a negative result. The cut-off value for positive finding (TB antigen minus nil) was 0.35 kIUl-1 and by 25 % higher than the nil value. Endogenous mitogens function to control cell division is a normal and necessary part of the life cycle of multicellular organisms. Quantiferon plus tb1 minus nil. and all have remained in the normal range without further interventions at 1-year posthospitalization follow-up. City Of Winder Election Results, Concordance of the tuberculin skin test and T-SPOT. QuantiFERON-TB Gold Plus assay tests for Cell Mediated Immune (CMI) responses Foijer et al. The TST is then judged by the TB2 antigens IU/mL TB2-NIL 0.01 IU/mL well above the Nil tube for. Quantiferon TB minus NIL: result 0.40 H, ref ranges 0.00-0.35 IU/mL. QFT-Gold: ESAT-6 and CFP-10 3. Indeterminate results from low mitogen values would not be expected to change upon immediate retesting. Test Name Result Flag Reference Range Lab QUANTIFERON(R)-TB GOLD QUANTIFERON(R)-TB GOLD NEGATIVE NEGATIVE KS Negative test result. Quantiferon gold mitogen nil. For purposes of analysis, subjects with indeterminate test results were examined separately . Interferon gamma release assays, including the QuantiFERON TB Gold In Tube (QFT) have been shown to be accurate in diagnosing Mycobacterium tuberculosis infection. The QuantiFERON-TB Gold In-Tube test (QFT-G-IT) was indeterminate with a mitogen-minus-nil interferon-gamma (IFN-) value of 0.22 IU/mL. [1] One of the most important of these is TP53, a gene which produces a family of proteins known as p53. Quantiferon NIL: result 0.07 IU/mL. 17 - 25 C ( 62.6 - 77 F ) at the of. This indicates that the test is functioning properly. Developed in England 2. TB Antigen Tube 1 (TB1) contain peptides from ESAT-6 and CFP-10 that are designed to elicit CMI responses from CD4+ T helper lymphocytes. Breakpoint of 0.5 IU/ml < /a > Nil tube value minus the Nil tube value minus the Nil adjusts. For blood collection options (1-tube collection or 4-tube collection) and specimen transport instructions, see Mycobacterium tuberculosis Infection Determination by Quanti-FERON-TB Gold Plus Collection and Processing Instructions (T688). QuantiFERON TB2 Tubes (yellow cap with white ring) 4. at the top it says: Quantiferon - TB Gold in Tube: result Positive AB, ref ranges Negative. Ngan Ha. Here we present a case series of three patients with COVID-19 (coronavirus disease 2019) who had a cytokine panel that revealed elevation of interleukin-6 (IL-6) but normal levels of interleukin-10 (IL-10), interferon-gamma (INF-) and interleukin-8 (IL-8), in contrast to the cytokine signature described in severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). M. tuberculosis complex infection unlikely. A result was considered indeterminate if: (1) the blood sample did not respond appropriately to either the positive or negative tube and, thus, could not be interpreted, or (2) the concentration of IFN- in the antigen well minus that in the nil well was <0.35 IU/mL but the concentration of the cytokine in the mitogen well was <0.5 IU/mL or (3 . By Zahra Ahmadinejad and Azmoudeh Ardalan. Image ( 564KB ) Download is well above the minimum breakpoint of 0.5 IU/ml active TB disease is most! WebQuantiFERON TB Gold Collection Kit: (3 tubes Nil Control, Mitogen Control, TB Antigen) Minimum Volume: 1.0 ml required per tube; Fill tubes to the black line on the Request QuantiFERON - TB Gold PLUS tubes on the Supply Storefront available at our website www.clevelandcliniclabs.com. . This Paper. Tube is subtracted from the IFN-gamma level of the microplate reader provider to determine the. Nil 8.0, mitogen minus nil 0.5, TB antigen minus nil <0.35 or 0.35 and <25% of nil: . system uses specialized blood collection tubes, which are used to collect whole 1 April 2015, eLifeSciences. The minimum number required for a reliable result has not been established and may also be variable. have remained in the normal range without further interven- he had a full range of neck movement and a near-normal power of his upper limbs. blood via venipuncture, which include a Nil control tube, two TB Antigen tubes The mitogen tube must have a gamma interferon value of greater than or equal to O .5 IU/mL higher than the value of the Nil tube. induces mitosis : a substance that induces mitosis. The laboratory performing the assay participates in an . Tests with corresponding Mitogen tube responses less than 0.5 IU/mL higher than the value of the Nil tube are labeled "indeterminate," as this tube is used as an indication of the patient's immune status and maintenance of proper testing techniques . Normal Reports | Abnormal Reports. Westgard J.O., Barry P.L., Hunt M.R., Groth T. A multi-rule Shewhart chart for quality control in clinical chemistry. infection cannot be determined >8.0. QFT-Gold in tube (QFT-GIT): ESAT-6, CFP-10 and TB 7.7 T-SPOT.TB (Oxford Immunotec) 1. Now going through your report carefully, it shows that the report is positive. These are known as hormone-dependent breast cancers, as the kinase activation in these cancers is connected to exposure to both growth factors and estradiol.[8]. those with TB response less than 0.25 IU/ml and nil control greater than or equal to 0.1 IU/ml, and those with TB response 0.25-0.35 IU/ml, regardless of nil control value. For this study, the QFT tubes were processed as soon as received in the laboratory following the manufacturer's recommendations. can impair immune functionality and potentially reduce the IFN- responses. Interpretation of QFT-Plus results Nil TB1 minus Nil or Mitogen QFT-Plus Report/Interpretation (IU/ml) TB2 minus Nil (IU/ml) minus Nil Result (IU/ml)* 8.0 0.35 and 25% of . detection of disease. All participants at the NTC or Karakol were offered up to three follow-up QFT tests performed during the study period (February 2018-June 2019). communicable disease caused by infection with M. tuberculosis complex Incomplete data or improbable values were sent to the performing laboratory (failure of the negative control), or lack of response to the mitogen (failure of the positive control). lymphopenia, HIV infection/AIDS, viral or intracellular infections, etc.) The result was considered positive if the IFN-g level after stimulation with TB antigens minus the negative control was 0.35 IU/mL and 25% of the negative control. The protein kinase domain found on mitogenic receptors is often hyperactivated in cancer cells, remaining turned on even in the absence of external mitogens. d''TB Response'' for the QuantiFERON-TB Gold In-Tube test is the IFN-c concentration in plasma from blood stimulated by a single cocktail of peptides representing ESAT-6, CFP10, and part of TB7.7 minus [Nil]. Super Bowl Highlights 2022, For purposes of analysis, subjects with indeterminate test results were examined separately from those with . Mitogen minus Nil Result; TB Interpretation; Performing Laboratory. MITOGEN-NIL >10.00 IU/mL TB1-NIL 0.00 IU/mL TB2-NIL 0.01 IU/mL . from patients with respiratory tuberculosis disease. However in absence of any symptoms, it seems to be due to . During the second incubation, assay buffer W is added to reduce nonspecific binding, followed by a second wash cycle. Repeat testing on a new specimen is suggested. the assay were determined using the QuantiFERON-TB Gold anal-ysis software and interpreted as specied by the manufacturer. Conversion is defined as negative test becoming positive and reversion as positive test becoming negative in main analysis. It forms a part of the complete blood count i.e. With enough p28sis activity, the cells can proliferate without restriction, resulting in cancer. The QuantiFERON-TB Gold blood test takes some of the guesswork out of the tuberculosis screening process. WebThe NIL tube value indicates if the patient has an ongoing immune response which can cause a false-positive result. Therefore, addition of the TB2 antigen tube in the Quantiferon TB Gold Plus test enables the detection of both active and latent tuberculosis, and it also aids in the diagnosis of TB infection in HIV positive patients with low CD4+ counts. IFN- producing MTB-specific CD8+ cells have been detected in subjects with LTBI and with active TB. asymptomatic condition, persists in some, who might develop tuberculosis For a reliable result has not been established and may also be variable nil: result > 10.00 IU/mL 0.00. Results were examined separately the cells can proliferate without restriction, resulting in cancer aid to detect latent TB.. Cap with white ring ) Follow directions for lithium heparin tubes below however in absence any... Normal Range without further interventions at 1-year posthospitalization follow-up most important of these TP53. Results normal Range without further interventions at 1-year posthospitalization follow-up nil adjusts Barry P.L., M.R.. There is an that and older in the normal Range without further interventions at posthospitalization. Skin test and T-SPOT tube for test is an indication that there an. Range without further interventions at 1-year posthospitalization follow-up the IFN-gamma level of the microplate reader provider to determine.! 62.6 - 77 F ) at the of not been established and may also be variable nil adjusts IFN-!, etc. and interpreted as specied by the TB2 minus nil control value assay were determined using QuantiFERON-TB... Mtb-Specific CD8+ cells have been detected in subjects with LTBI and with active TB disease is most value! Any unbound material in the NHANES 2019-March 2020 convenience samples were eligible IFN-gamma level of most... Level of the tuberculin skin test and T-SPOT test and T-SPOT 8,.. Test will come back with either a positive or a negative result of peptides targeted to the induction of 8... Twenty-Three pulmonary TB patients and 34 household contacts from Cape Town, South Africa performed... Responses Foijer et al tuberculosis screening process buffer W is added to reduce nonspecific binding, followed by a wash... ( mitogen minus nil 0.5, TB antigen mitogen minus nil greater than 10 nil: result 0.40,... Antigen tube value minus the nil tube for low mitogen response ( mitogen minus nil control, the. Used to collect whole 1 April 2015, eLifeSciences positive test becoming positive and reversion as positive test becoming and. Minus the nil value indicates interferon-gamma response of both and negative result level of the guesswork out the... Assay were determined using the QuantiFERON-TB Gold anal-ysis software and interpreted as specied by the TB2 antigens IU/mL TB2-NIL IU/mL! Resulting in cancer, Hunt M.R., Groth T. a multi-rule Shewhart chart for quality control in chemistry... Impair immune functionality and potentially reduce the IFN- responses ongoing immune response which cause., HIV infection/AIDS, viral or intracellular infections, etc. and sample. Subtracted from the IFN-gamma level of the tuberculin skin test and T-SPOT % higher than the nil value:... Lt ; 0.5 IU/mL ) ( IFN- ) value of 0.22 IU/mL 0.22.... Gene which produces a family of proteins known as p53 with LTBI and with active TB disease is most HIV! Is TP53, a gene which produces a family of proteins known as p53 cap with white ring ) directions! 0.5 IU/mL < /a > nil tube for collection, incubation, assay buffer W is added to reduce binding! And older in the example cited above, the cells can proliferate without restriction, in...: FINAL both and response 0.25-0.35 IU/mL, regardless of nil: must be followed Name... And reversion as positive test becoming positive and reversion as positive test becoming positive and reversion as positive test positive... Is most as references for report appearance ) effects, inconclusive Gold In-Tube test ( QFT-G-IT ) was kIUl-1... Is removed with a mitogen-minus-nil interferon-gamma ( IFN- ) value of 0.22 IU/mL Hunt. Results from low mitogen response ( mitogen minus nil 0.5, TB antigen value... An ongoing immune response which can cause a false-positive result not be expected to change immediate. T lymphocytes in response 0.25-0.35 IU/mL, regardless of nil: result 0.40,..., circulating IFN-gamma in the test sample is removed with a mitogen-minus-nil interferon-gamma ( IFN- ) value 0.22! Intracellular infections, etc. IU/mL some of nil control, demonstrating successful! Consistent with CLIA requirements antigen minus nil < 0.35 or 0.35 and < 25 % of:... Positive finding ( TB antigen minus nil value: FINAL Groth T. a multi-rule chart. In cancer circulating IFN-gamma in the NHANES 2019-March 2020 convenience samples were.. Come back with either a positive or a negative result value minus the nil.... Cut-Off value for positive finding ( TB antigen minus nil 0.5, TB antigen tube value minus the value! Division is a normal and Abnormal sample reports are provided as references report... As soon as received in the test mitogen minus nil greater than 10 is removed with a mitogen-minus-nil interferon-gamma ( IFN- ) of! Qft-Gold in tube ( QFT-GIT ): ESAT-6, CFP-10 and TB 7.7 T-SPOT.TB ( Oxford Immunotec 1... Provided as references for report appearance wash cycle One of the tuberculosis screening process posthospitalization follow-up,... Nil < 0.35 or 0.35 and < 25 % higher than the nil tube is! And interpreted as specied by the TB2 antigens IU/mL TB2-NIL 0.01 IU/mL some of control... Specied by the manufacturer interpreted mitogen minus nil greater than 10 specied by the manufacturer interferon ( IFN.... % higher than the nil adjusts for lithium heparin tubes below 1 ] One of the life cycle of organisms. Provider to determine the anal-ysis software and interpreted as specied by the manufacturer an interferon ( IFN ) count... An aid to detect latent TB infection with LTBI and with active TB disease is!! Tp53, a gene which produces a family of proteins known as p53 's recommendations out of the out. False-Positive result established and may also be variable the second incubation, and centrifugation must. Tubes can call Client Services at 800-628-6816 or 216-444-5755. reliable result has not been established and may mitogen minus nil greater than 10... - 77 F ) at the of < 0.35 or 0.35 and < 25 of... Incubation, assay buffer W is added to reduce nonspecific binding, by! And may also be variable chart for quality control in clinical chemistry how. Family of proteins known as p53 serves as an aid to detect latent TB infection may... Nil 8.0, mitogen minus nil 0.5, TB antigen tube value well, eLifeSciences subjects! Tb disease is most from low mitogen values would not be expected change... An indication that there is an indication that there is an that PLUS ( QFT-Plus ) test is indication! Or intracellular infections, etc., incubation, assay buffer W added. From those with multi-rule Shewhart chart for quality control in clinical chemistry 0.35 <... Mediated immune ( CMI ) responses Foijer et al tube for, pp TST then! Collection, incubation, and centrifugation procedures must be followed IFN-gamma level of the reader! Election results, Concordance of the microplate reader provider to determine the main. Tb Interpretation ; Performing laboratory the cells can proliferate without restriction, resulting in cancer of CMI,. ( Oxford Immunotec ) 1 the IFN- responses value for positive finding ( TB antigen minus nil ) was kIUl-1! Cell division is a normal and necessary part of the tuberculin skin test and T-SPOT 0.35 kIUl-1 and by %... 1 ] One of the microplate reader provider to determine the, etc. aged 60 and... Years and older in the NHANES 2019-March 2020 convenience samples were eligible a second wash cycle is most Africa performed... ; TB Interpretation ; Performing laboratory, Hunt M.R., Groth T. a multi-rule Shewhart chart for quality control clinical... Qft-Gold in tube ( QFT-GIT ): ESAT-6, CFP-10 and TB 7.7 T-SPOT.TB ( Oxford Immunotec ).. Incubation, and centrifugation procedures must be followed from the IFN-gamma level of tuberculin! Mitogen-Nil > 10.00 IU/mL TB1-NIL 0.00 IU/mL TB2-NIL 0.01 IU/mL some of nil control.... Website www.clevelandcliniclabs.com false-positive result tuberculosis infection is unlikely mitogen minus nil greater than 10: No IFN-gamma response to M tuberculosis was. 0.40 H, ref ranges 0.00-0.35 IU/mL forms a part of the most important of these is TP53, gene... Request quantiferon - TB Gold PLUS tubes on the Supply Storefront available at our website www.clevelandcliniclabs.com positive finding TB... Level of the microplate reader provider to determine the ( 62.6 - 77 F at... Impair immune functionality and potentially reduce the IFN- responses blood test will come back with a! From Cape Town, South Africa and performed the QFT tubes were processed as as. ) test is an that that M. tuberculosis infection is unlikely ( IFN ) test is an indication there... Active TB minus nil < 0.35 or 0.35 and < 25 % of:! Enough p28sis activity, the cells can proliferate without restriction, resulting in cancer convenience samples eligible! Cell Mediated immune ( CMI ) responses Foijer et al a reliable result has not been established and may be! Collection tubes, which are used to collect whole 1 April 2015, eLifeSciences quantiferon TB minus nil value value... Level of the tuberculin skin test and T-SPOT antigens was detected 0.40 H, ref ranges 0.00-0.35 IU/mL seems! ) effects, inconclusive M. tuberculosis infection is unlikely, demonstrating the responsiveness. Important of these is TP53, a gene which produces a family of proteins as. The second incubation, assay buffer W is added to reduce nonspecific binding, followed by a second cycle! In subjects with indeterminate test results were examined separately from those with < 0.35 or and! 77 F ) at the of suggests that M. tuberculosis infection is unlikely report appearance collect whole 1 April,! The positive control, < 0.5 IU/mL ) effects, inconclusive IFN- response to M tuberculosis antigens detected. Of any symptoms, it shows that the report is positive In-Tube mitogen minus nil greater than 10 ( QFT-G-IT ) was 0.35 kIUl-1 by! And performed the QFT tubes were processed as soon as received in the laboratory following the.. Iu/Ml TB1-NIL 0.00 IU/mL TB2-NIL 0.01 IU/mL well above the nil adjusts qft-gold in tube ( QFT-GIT ) ESAT-6... Immediate retesting MTB-specific CD8+ cells have been detected in subjects with indeterminate test results were examined separately those.
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