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Lebret A, Berton P, Normand V, Messager I, Robert N, Bouchet F, Brissonnier M, Boulbria G. PRRSV detection by qPCR in processing fluids and serum samples collected in a positive stable breeding herd following mass vaccination of sows with a modified live vaccine. Porcine Health Manag 2021; 7:6. [PMID: 33397484 PMCID: PMC7783972 DOI: 10.1186/s40813-020-00186-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023] Open
Abstract
In the last two decades, in France, Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) stabilization protocols have been implemented using mass vaccination with a modified live vaccine (MLV), herd closure and biosecurity measures. Efficient surveillance for PRRSV is essential for generating evidence of absence of viral replication and transmission in pigs. The use of processing fluid (PF) was first described in 2018 in the United States and was demonstrated to provide a higher herd-level sensitivity compared with blood samples (BS) for PRRSV monitoring. In the meantime, data on vertical transmission of MLV viruses are rare even as it is a major concern. Therefore, veterinarians usually wait for several weeks after a sow mass vaccination before starting a stability monitoring. This clinical study was conducted in a PRRSV-stable commercial 1000-sow breed-to-wean farm. This farm suffered from a PRRS outbreak in January 2018. After implementing a stabilisation protocol, this farm was controlled as stable for more than 9 months before the beginning of the study. PF and BS at weaning were collected in four consecutive batches born after a booster sow mass MLV vaccination. We failed to detect PRRSV by qPCR on PF and BS collected in a positive-stable breeding herd after vaccination with ReproCyc® PRRS EU (Boehringer Ingelheim, Ingelheim, Germany).
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Affiliation(s)
- A. Lebret
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
- rezoolution Pig Consulting Services, ZA de Gohélève, 56920 Noyal-Pontivy, France
| | - P. Berton
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
| | - V. Normand
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
- rezoolution Pig Consulting Services, ZA de Gohélève, 56920 Noyal-Pontivy, France
| | - I. Messager
- Boehringer Ingelheim Animal Health France, Swine Bussiness Unit, 16, rue Louis Pasteur, 44119 Treillères, France
| | - N. Robert
- Boehringer Ingelheim Animal Health France, Swine Bussiness Unit, 16, rue Louis Pasteur, 44119 Treillères, France
| | - F. Bouchet
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
- rezoolution Pig Consulting Services, ZA de Gohélève, 56920 Noyal-Pontivy, France
| | - M. Brissonnier
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
| | - G. Boulbria
- Porc. Spective Swine Vet Practice, ZA de Gohélève, 56920 Noyal-Pontivy, France
- rezoolution Pig Consulting Services, ZA de Gohélève, 56920 Noyal-Pontivy, France
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