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Breard E, Garnier A, Despres P, Blaise Boisseau S, Comtet L, Viarouge C, Bakkali-Kassimi L, Pourquier P, Hudelet P, Vitour D, Rossi S, Belbis G, Sailleau C, Zientara S. Development of a Double-Antigen Microsphere Immunoassay for Simultaneous Group and Serotype Detection of Bluetongue Virus Antibodies. Transbound Emerg Dis 2016; 64:1837-1847. [PMID: 27667484 DOI: 10.1111/tbed.12578] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/30/2022]
Abstract
Bluetongue viruses (BTV) are arboviruses responsible for infections in ruminants. The confirmation of BTV infections is based on rapid serological tests such as enzyme-linked immunosorbent assays (ELISAs) using the BTV viral protein 7 (VP7) as antigen. The determination of the BTV serotype by serological analyses could be only performed by neutralization tests (VNT) which are time-consuming and require BSL3 facilities. VP2 protein is considered the major serotype-defining protein of BTV. To improve the serological characterization of BTV infections, the recombinant VP7 and BTV serotype 8 (BTV-8) VP2 were synthesized using insect cells expression system. The purified antigens were covalently bound to fluorescent beads and then assayed with 822 characterized ruminant sera from BTV vaccinations or infections in a duplex microsphere immunoassay (MIA). The revelation step of this serological duplex assay was performed with biotinylated antigens instead of antispecies conjugates to use it on different ruminant species. The results demonstrated that MIA detected the anti-VP7 antibodies with a high specificity as well as a competitive ELISA approved for BTV diagnosis, with a better efficiency for the early detection of the anti-VP7 antibodies. The VP2 MIA results showed that this technology is also an alternative to VNT for BTV diagnosis. Comparisons between the VP2 MIA and VNT results showed that VNT detects the anti-VP2 antibodies in an early stage and that the VP2 MIA is as specific as VNT. This novel immunoassay provides a platform for developing multiplex assays, in which the presence of antibodies against multiple BTV serotypes can be detected simultaneously.
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Affiliation(s)
- E Breard
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | - A Garnier
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | - P Despres
- UMR PIMIT (I2T), Université de La Réunion, INSERM U1187, CNRS 9192, IRD 249, technology platform CYROI, Saint-Clotilde, La Reunion, France
| | - S Blaise Boisseau
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | | | - C Viarouge
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | - L Bakkali-Kassimi
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | | | | | - D Vitour
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | - S Rossi
- Unité Sanitaire de la Faune, Office National de la Chasse et de la Faune Sauvage, Gap, France
| | - G Belbis
- Unité de Pathologie du Bétail, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France
| | - C Sailleau
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
| | - S Zientara
- UMR 1161 VIROLOGIE ANSES-INRA-ENVA, Université Paris Est, ANSES, Maisons-Alfort, France
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Laloy E, Riou M, Barc C, Belbis G, Bréard E, Breton S, Cordonnier N, Crochet D, Delaunay R, Moreau J, Pozzi N, Raimbourg M, Sarradin P, Trapp S, Viarouge C, Zientara S, Ponsart C. Schmallenberg virus: experimental infection in goats and bucks. BMC Vet Res 2015; 11:221. [PMID: 26297244 PMCID: PMC4546222 DOI: 10.1186/s12917-015-0516-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 07/30/2015] [Indexed: 11/18/2022] Open
Abstract
Background Schmallenberg virus (SBV) is an emerging Orthobunyavirus of ruminant livestock species currently circulating in Europe. SBV causes a subclinical or mild disease in adult animals but vertical transmission to pregnant dams may lead to severe malformations in the offspring. Data on the onset of clinical signs, viremia and seroconversion in experimentally infected adult animals are available for cattle and sheep but are still lacking for goats. For a better understanding of the pathogenesis of SBV infection in adult ruminants, we carried out experimental infections in adult goats. Our specific objectives were: (i) to record clinical signs, viremia and seroconversion; (ii) to monitor viral excretion in the semen of infected bucks; (iii) to determine in which tissues SBV replication took place and virus-induced lesions developed. Results Four goats and two bucks were inoculated with SBV. Virus inoculation was followed by a short viremic phase lasting 3 to 4 days and a seroconversion occurring between days 7 and 14 pi in all animals. The inoculated goats did not display any clinical signs, gross lesions or histological lesions. Viral genomic RNA was found in one ovary but could not be detected in other organs. SBV RNA was not found in the semen samples collected from two inoculated bucks. Conclusions In the four goats and two bucks, the kinetics of viremia and seroconversion appeared similar to those previously described for sheep and cattle. Our limited set of data provides no evidence of viral excretion in buck semen.
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Affiliation(s)
- E Laloy
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité d'anatomie pathologique, 7 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - M Riou
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - C Barc
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - G Belbis
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité de pathologie des animaux de production, 7 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - E Bréard
- ANSES, UMR 1161 Virologie ANSES-INRA-ENVA, 23 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - S Breton
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - N Cordonnier
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité d'anatomie pathologique, 7 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - D Crochet
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - R Delaunay
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - J Moreau
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - N Pozzi
- LNCR, Laboratoire national de contrôle des reproducteurs, 13 rue Jouët, 94703, Maisons-Alfort, France.
| | - M Raimbourg
- LNCR, Laboratoire national de contrôle des reproducteurs, 13 rue Jouët, 94703, Maisons-Alfort, France.
| | - P Sarradin
- INRA Centre Val de Loire, UE-1277 Plateforme d'Infectiologie Expérimentale, secteur 3, route de Crotelles, 37380, Nouzilly, France.
| | - S Trapp
- INRA Centre Val de Loire, UMR 1282 Infectiologie et Santé Publique, 37380, Nouzilly, France. .,Université François Rabelais de Tours, UMR 1282 Infectiologie et Santé Publique, 37000, Tours, France.
| | - C Viarouge
- ANSES, UMR 1161 Virologie ANSES-INRA-ENVA, 23 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - S Zientara
- ANSES, UMR 1161 Virologie ANSES-INRA-ENVA, 23 avenue du Général de Gaulle, 94704, Maisons-Alfort, France.
| | - C Ponsart
- LNCR, Laboratoire national de contrôle des reproducteurs, 13 rue Jouët, 94703, Maisons-Alfort, France.
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Bréard E, Belbis G, Hamers C, Moulin V, Lilin T, Moreau F, Millemann Y, Montange C, Sailleau C, Durand B, Desprat A, Viarouge C, Hoffmann B, de Smit H, Goutebroze S, Hudelet P, Zientara S. Evaluation of humoral response and protective efficacy of two inactivated vaccines against bluetongue virus after vaccination of goats. Vaccine 2011; 29:2495-502. [PMID: 21256877 DOI: 10.1016/j.vaccine.2010.12.105] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 12/14/2010] [Accepted: 12/16/2010] [Indexed: 11/17/2022]
Abstract
Bluetongue serotype 8 has become a major animal health issue in the European Union and the European member States have agreed on a vaccination strategy, which involves only inactivated vaccines. In this study, the efficacy of two inactivated vaccines against bluetongue virus serotype 8 (BTV-8) used in Europe since 2008, BTVPUR ALSAP(®) 8 (MERIAL) and BOVILIS(®) BTV8 (Intervet/SP-AH), was evaluated in goats immunized and challenged with BTV-8 field isolates under experimental conditions. Serological, virological and clinical examinations were conducted before and after challenge. Three groups of 10 goats each (groups A, B and C) were randomly constituted and 2 groups (A and C) were subcutaneously vaccinated twice with one dose of the two commercial vaccines BTVPUR ALSAP 8 (group A) or BOVILIS BTV8 (group C) respectively. Animals of the groups A, C and B (B: controls) were challenged with a virulent inoculum containing BTV-8. During the experiment, it was found out that the BTV-8 challenge inoculum was contaminated with another BTV serotype. However, results demonstrated that vaccination of goats with two injections of BTVPUR ALSAP 8 or BOVILIS BTV8 provided a significant clinical protection against a BTV-8 challenge and completely prevented BTV-8 viraemia in all vaccinated animals. Qualitative data showed no difference in the kinetics and levels of the humoral response induced by these two inactivated vaccines.
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Affiliation(s)
- E Bréard
- ANSES, UMR Virology 1161, Laboratoire de Sante Animale, Maisons-Alfort, France.
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