Introduction and Application of the Interferon-γ Assay in the National Bovine Tuberculosis Control Program in South Korea
| Autor: | Soyoon Ryoo, Tae Woon Kim, Soon-Seek Yoon, Young Ju Lee, Sin Seok Kang, Yunho Jang, Min Kyu Jeong, Yoon Jeong Seo, Chan Ho Park, Jae-Myung Kim |
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| Rok vydání: | 2020 |
| Předmět: |
040301 veterinary sciences
CFT Ancillary test 0403 veterinary science 03 medical and health sciences Interferon γ Bovine tuberculosis Medicine bovine tuberculosis IFN-γ Original Research 030304 developmental biology 0303 health sciences Mycobacterium bovis lcsh:Veterinary medicine Kappa value General Veterinary biology business.industry 04 agricultural and veterinary sciences Skin test biology.organism_classification Virology Caudal fold cattle Herd lcsh:SF600-1100 Veterinary Science business |
| Zdroj: | Frontiers in Veterinary Science, Vol 7 (2020) Frontiers in Veterinary Science |
| ISSN: | 2297-1769 |
| Popis: | Bovine tuberculosis is a chronic disease impacting both public health and the livestock industry. The interferon (IFN)-γ assay has been introduced as an ancillary test for diagnosing bovine tuberculosis to overcome limitations of the skin test. The objective of this study was to assess the IFN-γ assay in terms of diagnostics and as a nationwide surveillance program in South Korea. From 2012 to 2013, cattle (n = 120) with bovine tuberculosis and cattle (n = 426) from bovine tuberculosis free herds were subjected to the IFN-γ assay to evaluate the sensitivity and specificity of the assay, respectively, depending on various cut-offs (0–3.5). When optical density of the cut-off was 0.1, the sensitivity and specificity were found to be 81.7% (74.7–88.6) and 99.5% (98.9–100.0), respectively. After introducing the IFN-γ assay as part of the national control program, the IFN-γ assay and single caudal fold skin test data were collected from 47 regional veterinary services to compare the results of these two tests. Overall, the agreement between the IFN-γ assay and the single caudal fold skin test (n = 492,068) was 98.2%, and Cohen's kappa value for the two methods was 0.47. Serial and parallel use of the IFN-γ assay and skin test for the bovine tuberculosis control program were compared using samples (n = 91) from cattle confirmed as bovine tuberculosis positive in laboratories from 2014 to 2016. Parallel screening for bTB showed much higher sensitivity (86/91, 94.5%) than the following screening approaches: serial (47.2%, 43/91), single screening using CFT (63.7%, 58/91), or the IFN-γ assay (78.0%, 71/91). These results indicate that the IFN-γ assay and single caudal fold skin test are complementary to each other; therefore, parallel use of these two tests is considered a useful approach to reduce the prevalence of bovine tuberculosis in South Korea. |
| Databáze: | OpenAIRE |
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