{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T13:53:20Z","timestamp":1774619600908,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2023,3,18]],"date-time":"2023-03-18T00:00:00Z","timestamp":1679097600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Introduction: Tuberculosis (TB) is one of the most prevalent respiratory diseases in the world. In 2020 there were at least 9.9 million new infections, with 1.5 million deaths. Approximately 10% of people infected with Mycobacterium tuberculosis develop the disease during the first 2 to 5 years after infection. In South America, the diagnosis of Latent Tuberculosis Infections (LTBI) continues to be performed through the Mantoux tuberculin skin test (TST). Objective: The objective of our study was to compare the sensitivity of a new immunofluorescence IGRA test against a widely available IGRA kit on the market. Material and method: Close contact with infectious TB patients, HIV patients, or immunocompromised for another cause were recruited. Two interferon-gamma release assay (IGRA) diagnostic kits were used and compared with TST. Results: 76 patients were recruited, 93.42% were Chilean nationality, and 98.68% of the patients did not have immunosuppression. The sensitivity of the new technique was 88.89%, and the specificity was 92.50% in the study population compared to the IGRA previously used. In the subgroup older than 36 years, the sensitivity was 95.65%, and the specificity was 89.47%. Conclusion: IGRA techniques are a new resource in clinical laboratories to make an accurate diagnosis of LTBI in the region of the Americas. In our population, the greatest benefit of this new IGRA would be observed in people over 36 years of age, where the sensitivity of the technique was like that of the currently available test.<\/jats:p>","DOI":"10.3390\/diagnostics13061162","type":"journal-article","created":{"date-parts":[[2023,3,20]],"date-time":"2023-03-20T02:38:27Z","timestamp":1679279907000},"page":"1162","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Comparison of Two Tuberculosis Infection Tests in a South American Tertiary Hospital: STANDARD F TB-Feron FIA vs. QIAreachTM QuantiFERON-TB"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6099-5084","authenticated-orcid":false,"given":"Gustavo","family":"Saint-Pierre","sequence":"first","affiliation":[{"name":"Unidad Microbiolog\u00eda Secci\u00f3n Koch, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"},{"name":"Programa de Virolog\u00eda, ICBM, Facultad de Medicina, Universidad de Chile, Independencia 1027, Santiago 8380453, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6583-0177","authenticated-orcid":false,"given":"Daniel","family":"Conei","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Salud, Universidad de Ays\u00e9n, Coyhaique 5951537, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia","family":"Cantillana","sequence":"additional","affiliation":[{"name":"Unidad Microbiolog\u00eda Secci\u00f3n Koch, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mariella","family":"Raijmakers","sequence":"additional","affiliation":[{"name":"Medicina Interna, University of Santiago, Santiago 9170022, Chile"},{"name":"Departamento de Medicina Interna, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrea","family":"Vera","sequence":"additional","affiliation":[{"name":"Unidad Microbiolog\u00eda Secci\u00f3n Koch, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniela","family":"Guti\u00e9rrez","sequence":"additional","affiliation":[{"name":"Unidad Microbiolog\u00eda Secci\u00f3n Koch, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristopher","family":"Kennedy","sequence":"additional","affiliation":[{"name":"Unidad Microbiolog\u00eda Secci\u00f3n Koch, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paulina","family":"Peralta","sequence":"additional","affiliation":[{"name":"Policl\u00ednico Infectolog\u00eda\/Inmunolog\u00eda, Hospital Barros Luco Trudeau, Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paulina","family":"Ramonda","sequence":"additional","affiliation":[{"name":"Servicio de Salud Metropolitano Sur, Santiago 8900000, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"788","DOI":"10.3390\/clinpract12050082","article-title":"Role of Interferons in Mycobacterium tuberculosis Infection","volume":"12","author":"Shanmuganathan","year":"2022","journal-title":"Clin. 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