articles about PRRS

Explaining the persistence of PRRSV in vaccinated breeding herds

Selection of viral variants with enhanced transmission and reduced neutralization susceptibility alongside lateral introductions may explain the persistence of PRRSV in vaccinated breeding herds.

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HealthNews

UK: PRRS project funding to improve biosecurity in Scotland

A project to eradicate PRRS from Scotland to get further Scottish Government funding.

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HealthNews

U.S: Launch of new monthly PRRSV variant report

A new national surveillance effort enhances decision-making in swine health by identifying and communicating emerging PRRSV variants.

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HealthNews

Denmark: Analysis on PRRS and antibiotic consumption in 2024

There was a highly significant effect of PRRS health status on the median antibiotic consumption at the herd level.

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ManagementAbstract

Environmental enrichment affects immunity and reduces disease severity in pigs after co-infection, with stronger effects when applied from birth than from weaning

Enriched housing from birth reduced disease severity to co-infection with PRRSV and A. pleuropneumoniae.

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Markets-EconomicsNews

South Africa’s Pork Industry Faces Threat from US Trade Choice

South Africa risks its pork industry to protect citrus exports as US trade demands market access for pork despite PRRS disease concerns.

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Figure 1: Representation of a recombination event generating a new virus. The region before and after the points where the two lines cross denote the portion of genomes received from the two parental viruses. Genome regions are shown at the top.

HealthArticle

The implications of the PRRSV recombination dilemma

PRRS control measures also reduce the opportunities for different wild-type viruses to recombine and create more aggressive strains.

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Figure 1: Schematic representation of a PRRSV whole genome (GenBank U87392) and the target regions for different diagnostic assays. In the United States, RT-PCR assays to detect modified live virus (MLV) vaccine-like viruses target the nsp2 region, and CLAMP sequencing to block amplification of MLV vaccine viruses during Sanger sequencing targets the ORF5 gene.

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HealthArticle

PRRS Molecular diagnostics: when sequencing only 4% is not enough

Genetic mutation and evolution of PRRSV can occur across all genes. Unlike ORF5, which only represents about 4% of the PRRSV genome, NGS can recover a whole PRRSV genome to be used in epidemiological investigations.

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HealthAbstract

Comparison of a novel rapid sampling method to serum and tonsil scraping to detect PRRSV in acutely infected sows

Results suggest great potential of tonsil-oral scraping as a novel, practical, and rapid tool for PRRSV RNA detection in sows to assess sow herd status.

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Genetics-ReproductionPress releases

PIC receives FDA approval for technology used to breed PRRS-resistant pigs

PIC is among the first to receive approval for the use of gene editing in commercial livestock in the U.S.

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Figure 1: Prevalence (%) of Danish pig herds with positive PRRS health status by region January 2025

HealthArticle

From 32% to 68% of PRRS negative farms after 3 years of the Danish national PRRS reduction strategy

The first three years of the Danish PRRS reduction strategy have shown that it is possible to control and reduce the prevalence of PRRS in Danish pig production.

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HealthArticle

Rosalia is here! How do we deal with a highly virulent PRRS outbreak on the farm?

In the first two months, the outbreak caused more than 600 abortions and more than 150 sow deaths, destroying the weekly batch structure.

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HealthArticle

Allen D. Leman Swine Conference 2024 Summary: Health

The last of the three summaries by Antonio Palomo dedicated to the 2024 edition of the Allen D. Leman Conference focuses on health: biosecurity and viral and bacterial diseases.

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