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Pawęska JT, Jansen van Vuren P, Msimang V, Lô MM, Thiongane Y, Mulumba-Mfumu LK, Mansoor A, Fafetine JM, Magona JW, Boussini H, Bażanow B, Wilson WC, Pepin M, Unger H, Viljoen G. Large-Scale International Validation of an Indirect ELISA Based on Recombinant Nucleocapsid Protein of Rift Valley Fever Virus for the Detection of IgG Antibody in Domestic Ruminants. Viruses 2021; 13:1651. [PMID: 34452515 PMCID: PMC8402881 DOI: 10.3390/v13081651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/06/2021] [Accepted: 08/13/2021] [Indexed: 12/21/2022] Open
Abstract
Diagnostic performance of an indirect enzyme-linked immunosorbent assay (I-ELISA) based on a recombinant nucleocapsid protein (rNP) of the Rift Valley fever virus (RVFV) was validated for the detection of the IgG antibody in sheep (n = 3367), goat (n = 2632), and cattle (n = 3819) sera. Validation data sets were dichotomized according to the results of a virus neutralization test in sera obtained from RVF-endemic (Burkina Faso, Democratic Republic of Congo, Mozambique, Senegal, Uganda, and Yemen) and RVF-free countries (France, Poland, and the USA). Cut-off values were defined using the two-graph receiver operating characteristic analysis. Estimates of the diagnostic specificity of the RVFV rNP I-ELISA in animals from RVF-endemic countries ranged from 98.6% (cattle) to 99.5% (sheep) while in those originating from RVF-free countries, they ranged from 97.7% (sheep) to 98.1% (goats). Estimates of the diagnostic sensitivity in ruminants from RVF-endemic countries ranged from 90.7% (cattle) to 100% (goats). The results of this large-scale international validation study demonstrate the high diagnostic accuracy of the RVFV rNP I-ELISA. Standard incubation and inactivation procedures evaluated did not have an adverse effect on the detectable levels of the anti-RVFV IgG in ruminant sera and thus, together with recombinant antigen-based I-ELISA, provide a simple, safe, and robust diagnostic platform that can be automated and carried out outside expensive bio-containment facilities. These advantages are particularly important for less-resourced countries where there is a need to accelerate and improve RVF surveillance and research on epidemiology as well as to advance disease control measures.
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Affiliation(s)
- Janusz T. Pawęska
- Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Sandringham 2131, South Africa;
- Centre for Viral Zoonoses, Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Pretoria 0001, South Africa
- Faculty of Health Sciences, School of Pathology, University of Witwatersrand, Johannesburg 2050, South Africa
| | - Petrus Jansen van Vuren
- Australian Centre for Disease Preparedness, CSIRO Health & Biosecurity, Geelong, VIC 3220, Australia;
| | - Veerle Msimang
- Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases of the National Health Laboratory Service, Sandringham 2131, South Africa;
| | - Modu Moustapha Lô
- Laboratoire National de l’Elevage et de Recherches Vétérinaires, Route de Front de Terre, Dakar Hann 2057, BP, Senegal; (M.M.L.); (Y.T.)
| | - Yaya Thiongane
- Laboratoire National de l’Elevage et de Recherches Vétérinaires, Route de Front de Terre, Dakar Hann 2057, BP, Senegal; (M.M.L.); (Y.T.)
| | - Leopold K. Mulumba-Mfumu
- Ministry of Agriculture, Democratic Republic of Congo, Kinshasa 7948, Democratic Republic of the Congo;
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Kinshasa, P.O. Box 127, Kinshasa XI, Democratic Republic of the Congo
| | - Alqadasi Mansoor
- Central Veterinary Laboratory, General Directorate of Animal Health & Veterinary Quarantine, Ministry of Agriculture and Irrigation, Sana’a 31220, Yemen;
- Food and Agriculture Organization Office, Sana’a 31220, Yemen
| | - José M. Fafetine
- Veterinary Faculty, Eduardo Mondlane University, Maputo 1103, Mozambique;
| | - Joseph W. Magona
- National Livestock Resources Research Institute, Tororo P.O. Box 96, Uganda;
- Food and Agriculture Organization, Gaborone P.O. Box 54, Botswana
| | - Hiver Boussini
- Direction Generale Des Services Veterinaires, Ministère des Ressources Animales, Ouagadougou 09 BP 907, Burkina Faso;
- African Union Interafrican Bureau for Animal Resources, Nairobi P.O. Box 30786-00100, Kenya
| | - Barbara Bażanow
- Department of Pathology, Faculty of Veterinary Science, University of Environmental and Life Sciences, 50-375 Wroclaw, Poland;
| | - William C. Wilson
- United States Department of Agriculture, Agricultural Research Service, Foreign Arthropod Borne Animal Diseases Research Unit, National Bio- and Agro-Defense Facility, Manhattan, KS 66502, USA;
| | - Michel Pepin
- Agence Française de Sécurité Sanitaire des Aliments, F-69364 Lyon, France;
- VetAgro Sup, Campus Vétérinaire de Lyon, F-69364 Lyon, France
| | - Hermann Unger
- Joint FAO/IAEA Centre for Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, 1400 Vienna, Austria; (H.U.); (G.V.)
| | - Gerrit Viljoen
- Joint FAO/IAEA Centre for Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, 1400 Vienna, Austria; (H.U.); (G.V.)
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