PMID- 25763458 OWN - NLM STAT- MEDLINE DCOM- 20150803 LR - 20220409 IS - 1535-4970 (Electronic) IS - 1073-449X (Linking) VI - 191 IP - 10 DP - 2015 May 15 TI - Risk Assessment of Tuberculosis in Contacts by IFN-gamma Release Assays. A Tuberculosis Network European Trials Group Study. PG - 1176-84 LID - 10.1164/rccm.201502-0232OC [doi] AB - RATIONALE: Latent infection with Mycobacterium tuberculosis is defined by a positive IFN-gamma release assay (IGRA) result in the absence of active tuberculosis. Only few, mostly monocentric studies have evaluated the role of IGRAs to predict the development of tuberculosis in recent contacts in low-incidence countries of tuberculosis. OBJECTIVES: To analyze IGRA results and the effect of preventive chemotherapy on tuberculosis progression rates among recent contacts. METHODS: Results from contact investigations at 26 centers in 10 European countries including testing for latent infection with M. tuberculosis by the QuantiFERON-TB Gold In-Tube (QFT) test or the T-SPOT.TB (TSPOT) were prospectively collected and analyzed. MEASUREMENTS AND MAIN RESULTS: Among 5,020 contacts of 1,023 index cases, 25 prevalent secondary cases were identified at screening. Twenty-four incident cases occurred among 4,513 contacts during 12,326 years of cumulative follow-up. In those with a positive IGRA result, tuberculosis incidence was 0.2 (QFT) and 0 (TSPOT) per 100 patient-years when contacts received preventive chemotherapy versus 1.2 (QFT) and 0.8 (TSPOT) per 100 patient-years in those not treated (38 and 37 patients needed to be treated to prevent one case, respectively). Positive and negative predictive values were 1.9% (95% confidence interval [CI], 1.1-3.0) and 99.9% (95% CI, 99.7-100) for the QFT and 0.7% (95% CI, 0.1-2.6) and 99.7% (95% CI, 99.1-99.9) for the TSPOT. CONCLUSIONS: Tuberculosis rarely developed among contacts, and preventive chemotherapy effectively reduced the tuberculosis risk among IGRA-positive contacts. Although the negative predictive value of IGRAs is high, the risk for the development of tuberculosis is poorly predicted by these assays. FAU - Zellweger, Jean-Pierre AU - Zellweger JP AD - 1 Swiss Lung Association, Berne, Switzerland. FAU - Sotgiu, Giovanni AU - Sotgiu G FAU - Block, Michael AU - Block M FAU - Dore, Simone AU - Dore S FAU - Altet, Neus AU - Altet N FAU - Blunschi, Rebecca AU - Blunschi R FAU - Bogyi, Matthias AU - Bogyi M FAU - Bothamley, Graham AU - Bothamley G FAU - Bothe, Christina AU - Bothe C FAU - Codecasa, Luigi AU - Codecasa L FAU - Costa, Patrizia AU - Costa P FAU - Dominguez, Jose AU - Dominguez J FAU - Duarte, Raquel AU - Duarte R FAU - Floe, Andreas AU - Floe A FAU - Fresard, Isabelle AU - Fresard I FAU - Garcia-Garcia, Jose-Maria AU - Garcia-Garcia JM FAU - Goletti, Delia AU - Goletti D FAU - Halm, Petra AU - Halm P FAU - Hellwig, Doris AU - Hellwig D FAU - Henninger, Eveline AU - Henninger E FAU - Heykes-Uden, Helga AU - Heykes-Uden H FAU - Horn, Liane AU - Horn L FAU - Kruczak, Katarzyna AU - Kruczak K FAU - Latorre, Irene AU - Latorre I FAU - Pache, Genevieve AU - Pache G FAU - Rath, Heidrun AU - Rath H FAU - Ringshausen, Felix C AU - Ringshausen FC FAU - Ruiz, Asuncion Seminario AU - Ruiz AS FAU - Solovic, Ivan AU - Solovic I FAU - Souza-Galvao, Maria-Luiza de AU - Souza-Galvao ML FAU - Widmer, Ursula AU - Widmer U FAU - Witte, Peter AU - Witte P FAU - Lange, Christoph AU - Lange C CN - TBNET LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Respir Crit Care Med JT - American journal of respiratory and critical care medicine JID - 9421642 RN - 0 (Antitubercular Agents) SB - IM CIN - Am J Respir Crit Care Med. 2015 May 15;191(10):1101-3. PMID: 25978570 MH - Adolescent MH - Adult MH - Aged MH - Antitubercular Agents/*administration & dosage MH - Chemoprevention MH - Child MH - Child, Preschool MH - *Contact Tracing MH - Disease Progression MH - Europe MH - Female MH - Humans MH - Infant MH - Infant, Newborn MH - Interferon-gamma Release Tests MH - Latent Tuberculosis/diagnosis/*transmission MH - Male MH - Middle Aged MH - Multicenter Studies as Topic MH - Mycobacterium tuberculosis/immunology/isolation & purification MH - Risk Assessment/methods MH - Tuberculin Test/methods MH - Tuberculosis/diagnosis/drug therapy/prevention & control MH - Young Adult OTO - NOTNLM OT - IFN-gamma release assay OT - LTBI OT - QuantiFERON OT - T-SPOT.TB OT - tuberculosis FIR - Aeby, Myriam IR - Aeby M FIR - Cuzzi, Gilda IR - Cuzzi G FIR - Girardi, Enrio IR - Girardi E FIR - Vanini, Valentina IR - Vanini V FIR - Vecchi, Eleonora IR - Vecchi E FIR - Lauria, Francesco Nicola IR - Lauria FN FIR - Vecchi, Marco IR - Vecchi M FIR - Ferrarese, Maurizio IR - Ferrarese M FIR - Repossi, Alice IR - Repossi A FIR - Gerdes, Silke IR - Gerdes S FIR - Haller, Martina IR - Haller M FIR - Glaewe, Andrea IR - Glaewe A FIR - Krabbe, Lenka IR - Krabbe L FIR - Hilberg, Ole IR - Hilberg O FIR - Janssens, Jean-Paul IR - Janssens JP FIR - Rubsamen, Christof IR - Rubsamen C FIR - Schlosser, Stephan IR - Schlosser S FIR - Villanueva-Montes, Manuel-Angel IR - Villanueva-Montes MA EDAT- 2015/03/13 06:00 MHDA- 2015/08/04 06:00 CRDT- 2015/03/13 06:00 PHST- 2015/03/13 06:00 [entrez] PHST- 2015/03/13 06:00 [pubmed] PHST- 2015/08/04 06:00 [medline] AID - 10.1164/rccm.201502-0232OC [doi] PST - ppublish SO - Am J Respir Crit Care Med. 2015 May 15;191(10):1176-84. doi: 10.1164/rccm.201502-0232OC.