1
|
Jang YH, Kim TW, Jeong MK, Seo YJ, Ryoo S, Park CH, Kang SS, Lee YJ, Yoon SS, Kim JM. Introduction and Application of the Interferon-γ Assay in the National Bovine Tuberculosis Control Program in South Korea. Front Vet Sci 2020; 7:222. [PMID: 32411741 PMCID: PMC7198753 DOI: 10.3389/fvets.2020.00222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 04/01/2020] [Indexed: 11/13/2022] Open
Abstract
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.
Collapse
Affiliation(s)
- Yun-Ho Jang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Tae-Woon Kim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Min Kyu Jeong
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Yoon Jeong Seo
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Soyoon Ryoo
- Foot and Mouth Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Chan Ho Park
- Gangwondo Livestock & Veterinary Service, Chuncheon-si, South Korea
| | - Sin Seok Kang
- Chungcheongbukdo Livestock & Veterinary Service, Chungju-si, South Korea
| | - Young Ju Lee
- College of Veterinary Medicine, Kyungpook National University, Daegu, South Korea
| | - Soon-Seek Yoon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| | - Jae Myung Kim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, Gimcheon-si, South Korea
| |
Collapse
|
2
|
Soares Filho P, Ramalho A, Silva A, Issa M, Mota P, Silva C, Ribeiro A, Rei J, Leite R. Diagnostic performance of a commercial ELISA used as a complementary test for bovine tuberculosis in two bovine herds with different disease status. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ABSTRACT Bovine tuberculosis is a worldwide spread zoonotic disease. Intradermal tuberculinizations are the most used diagnostic tests in the world. Serological tests can be an ancillary diagnosis for bovine tuberculosis. The objective of this study was to evaluate the diagnostic performance of the ELISA Mycobacterium Bovis Antibody Test Kit IDEXX ™ in infected herds, which were in different disease control stages. One hundred and twenty animals from two dairy herds of Minas Gerais state, Brazil, were subjected to the ELISA serological test and the comparative cervical tuberculin test (CCT). Diagnostic test parameters were estimated using Bayesian latent class models and concordance between tests estimated by the frequentist approach. The ELISA test presented lower sensitivity than CCT in both herds. Its sensitivity was higher in the herd in sanitation process. Specificity estimates were above 95% in both herds. Kappa index indicated low concordance or even disagreement between tests. According to the results, the ELISA IDEXX should not be used as substitution for CCT. The tests must not be associated in series. Parallel association increased diagnostic sensitivity in the herd which was in the process of sanitation.
Collapse
Affiliation(s)
| | - A.K. Ramalho
- Ministério da Agricultura, Pecuária e Abastecimento, Brazil
| | - A.M. Silva
- Ministério da Agricultura, Pecuária e Abastecimento, Brazil
| | - M.A. Issa
- Ministério da Agricultura, Pecuária e Abastecimento, Brazil
| | - P.M.P.C. Mota
- Ministério da Agricultura, Pecuária e Abastecimento, Brazil
| | | | | | - J.K.P. Rei
- Universidade Federal de Minas Gerais, Brazil
| | - R.C. Leite
- Universidade Federal de Minas Gerais, Brazil
| |
Collapse
|
3
|
Abstract
Germany has been officially free of bovine tuberculosis since 1996. However, in the last years there has been an increase of bovine tuberculosis cases, particularly in the southern part of Germany, in the Allgäu region. As a consequence a one-time tuberculosis surveillance program was revisited with different premortal and postmortal tests. The aim of this paper was to estimate diagnostic sensitivities and specificities of the different tests used within this surveillance program. In the absence of a perfect test with 100% sensitivity and 100% specificity, thus in the absence of a gold standard, a Bayesian latent class approach with two different datasets was performed. The first dataset included 389 animals, tested with single intra-dermal comparative cervical tuberculin (SICCT) test, PCR and pathology; the second dataset contained 175 animals, tested with single intra-dermal cervical tuberculin (SICT) test, Bovigam® assay, pathology and culture. Two-way conditional dependencies were considered within the models. Additionally, inter-laboratory agreement (five officially approved laboratories) of the Bovigam® assay was assessed with Cohen's kappa test (21 blood samples). The results are given in posterior means and 95% credibility intervals. The specificities of the SICT test, SICCT test, PCR and pathology ranged between 75.8% [68.8-82.2%] and 99.0% [96.8-100%]. The Bovigam® assay stood out with a very low specificity (6.9% [3.6-11.1%]), though it had the highest sensitivity (95.7% [91.3-99.2%]). The sensitivities of the SICCT test, PCR, SICT test, pathology and culture varied from 57.8% [48.0-67.6%] to 88.9% [65.5-99.7%]. The prevalences were 19.8% [14.6-26.5%] (three-test dataset) and 7.7% [4.2-12.3%] (four-test dataset). Among all pairwise comparisons the highest agreement was 0.62 [0.15-1]). In conclusion, the specificity of the Bovigam® assay and the inter-laboratory agreement were lower than expected.
Collapse
|
4
|
Nuñez-Garcia J, Downs SH, Parry JE, Abernethy DA, Broughan JM, Cameron AR, Cook AJ, de la Rua-Domenech R, Goodchild AV, Gunn J, More SJ, Rhodes S, Rolfe S, Sharp M, Upton PA, Vordermeier HM, Watson E, Welsh M, Whelan AO, Woolliams JA, Clifton-Hadley RS, Greiner M. Meta-analyses of the sensitivity and specificity of ante-mortem and post-mortem diagnostic tests for bovine tuberculosis in the UK and Ireland. Prev Vet Med 2017; 153:94-107. [PMID: 28347519 DOI: 10.1016/j.prevetmed.2017.02.017] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 01/07/2017] [Accepted: 02/26/2017] [Indexed: 10/20/2022]
Abstract
Bovine Tuberculosis (bTB) in cattle is a global health problem and eradication of the disease requires accurate estimates of diagnostic test performance to optimize their efficiency. The objective of this study was, through statistical meta-analyses, to obtain estimates of sensitivity (Se) and specificity (Sp), for 14 different ante-mortem and post-mortem diagnostic tests for bTB in cattle. Using data from a systematic review of the scientific literature (published 1934-2009) diagnostic Se and Sp were estimated using Bayesian logistic regression models adjusting for confounding factors. Random effect terms were used to account for unexplained heterogeneity. Parameters in the models were implemented using Markov Chain Monte Carlo (MCMC), and posterior distributions for the diagnostic parameters with adjustment for covariates (confounding factors) were obtained using the inverse logit function. Estimates for Se and/or Sp of the tuberculin skin tests and the IFN-γ blood test were compared with estimates published 2010-2015. Median Se for the single intradermal comparative cervical tuberculin skin (SICCT) test (standard interpretation) was 0.50 and Bayesian credible intervals (CrI) were wide (95% CrI 0.26, 0.78). Median Sp for the SICCT test was 1.00 (95% CrI 0.99, 1.00). Estimates for the IFN-γ blood test Bovine Purified Protein Derivative (PPD)-Avian PPD and Early Secreted Antigen target 6 and Culture Filtrate Protein 10 (ESAT-6/CFP10) ESAT6/CFP10 were 0.67 (95% CrI 0.49, 0.82) and 0.78 (95% CrI 0.60, 0.90) respectively for Se, and 0.98 (95% CrI 0.96, 0.99) and 0.99 (95% CrI 0.99, 1.00) for Sp. The study provides an overview of the accuracy of a range of contemporary diagnostic tests for bTB in cattle. Better understanding of diagnostic test performance is essential for the design of effective control strategies and their evaluation.
Collapse
Affiliation(s)
- Javier Nuñez-Garcia
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Sara H Downs
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom.
| | - Jessica E Parry
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Darrell A Abernethy
- Veterinary Service, Department of Agriculture and Rural Development, Belfast BT4 3SB, United Kingdom; Faculty of Veterinary Science, University of Pretoria, South Africa
| | - Jennifer M Broughan
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Angus R Cameron
- AusVet Animal Health Services Pty Ltd., PO Box 3180, South Brisbane, Qld 4101, Australia
| | - Alasdair J Cook
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom; Department of Veterinary Epidemiology, School of Veterinary Medicine, University of Surrey, GU2 7AL, United Kingdom
| | - Ricardo de la Rua-Domenech
- Advice Services, APHA, and Bovine Tuberculosis Programme, Department for Environment, Food and Rural Affairs, London SW1P 3JR, United Kingdom
| | - Anthony V Goodchild
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Jane Gunn
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Simon J More
- Centre for Veterinary Epidemiology and Risk Analysis, UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Shelley Rhodes
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Simon Rolfe
- Office of the Chief Veterinary Officer, Welsh Government, Cardiff CF10 3NQ, United Kingdom
| | - Michael Sharp
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Paul A Upton
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - H Martin Vordermeier
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom
| | - Eamon Watson
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom; National Milk Laboratories, Wiltshire SN15 1BN, United Kingdom
| | - Michael Welsh
- Veterinary Sciences Division, Agri-Food & Biosciences Institute (AFBI), Belfast BT4 3SD, United Kingdom; CSO SISAF Ltd., Northern Ireland Science Park, Unit 15A The Innovation Centre, Belfast BT3 9DT, United Kingdom
| | - Adam O Whelan
- Animal and Plant Health Agency (APHA), Weybridge, Surrey KT15 3NB, United Kingdom; Microbiology, Dstl, Porton Down, SP4 0JQ, United Kingdom
| | - John A Woolliams
- The Roslin Institute, Roslin Biocentre, Roslin, Midlothian EH25 9PS, United Kingdom
| | | | - Matthias Greiner
- Federal Institute for Risk assessment (BfR), D-10589 Berlin, and Veterinary University Hannover, Foundation, Germany
| |
Collapse
|