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A Molecular and Epidemiological Description of a Severe Porcine Reproductive and Respiratory Syndrome Outbreak in a Commercial Swine Production System in Russia.
- Source :
-
Viruses [Viruses] 2022 Feb 11; Vol. 14 (2). Date of Electronic Publication: 2022 Feb 11. - Publication Year :
- 2022
-
Abstract
- Porcine reproductive and respiratory syndrome (PRRS) is an economically devastating disease of swine in many parts of the world. Porcine reproductive and respiratory syndrome virus (PRRSV) type 1 is endemic in Europe, and prevalence of the subtypes differ spatially. In this study, we investigated a severe PRRS outbreak reported in 30 farms located in eastern Russia that belong to a large swine production company in the region that was also experiencing a pseudorabies outbreak in the system. Data included 28 ORF5 sequences from samples across 18 of the 25 infected sites, reverse transcriptase real-time polymerase chain reaction (RT-qPCR) results from diagnostic testing, reports of clinical signs, and animal movement records. We observed that the outbreak was due to two distinct variants of wildtype PRRSV type 1 subtype 1 with an average genetic distance of 15%. Results suggest that the wildtype PRRSV variants were introduced into the region around 2019, before affecting this production system (i.e., sow farms, nurseries, and finisher farms). Clinical signs did not differ between the variants, but they did differ by stage of pig production. Biosecurity lapses, including movement of animals from infected farms contributed to disease spread.
- Subjects :
- Animals
Disease Outbreaks veterinary
Epidemiological Monitoring
Evolution, Molecular
Farms
Molecular Epidemiology
Phylogeny
Porcine Reproductive and Respiratory Syndrome epidemiology
Porcine Reproductive and Respiratory Syndrome virology
Porcine respiratory and reproductive syndrome virus isolation & purification
Russia epidemiology
Swine
Porcine respiratory and reproductive syndrome virus genetics
Swine Diseases epidemiology
Swine Diseases virology
Subjects
Details
- Language :
- English
- ISSN :
- 1999-4915
- Volume :
- 14
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Viruses
- Publication Type :
- Academic Journal
- Accession number :
- 35215966
- Full Text :
- https://doi.org/10.3390/v14020375