articles about PRRS

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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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HealthArticle

Influenza and PRRSV: Similarities, differences, and interactions

We analyze the two most relevant respiratory viruses in the swine population.

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Areas of the active control plan for PRRS reduction. Active negativization areas are marked in orange. Left: January 2024. Right: January 2025.

HealthNews

Denmark: PRRS trend report 2024

How the PRRS reduction plan in Denmark has developed including the status and occurrence of PRRS in Danish pig herds.

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HealthAbstract

Pluck-pools as diagnostic samples for PRRSV and PCV2 in abortion material and stillbirths

Pluck-pools can be valuable diagnostic material.

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HealthAbstract

Assessment of temperature and time on the survivability of PRRSV and PEDV on experimentally contaminated surfaces

Time and temperature combinations effectively decrease the concentration of PRRSV and PEDV on different surfaces.

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HealthArticle

Porcine reproductive and respiratory syndrome virus (PRRSV) vaccines

This article describes the main characteristics of commercial vaccines to combat PRRS.

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Figure 1. Gene editing using the CRISPR-Cas9 system. A guide RNA (sgRNA) recognizes a specific genomic region, which targets the DNA endonuclease Cas9. This enzyme cleaves the two DNA strands at the precise location. Adapted from: https://es.moleculardevices.com/applications/gene-editing-with-crispr-engineering

Genetics-ReproductionArticle

Gene editing: What is it? What can it bring to the swine industry?

Gene editing represents a significant technological advancement that we must thoroughly understand due to its potential impact on the swine industry. Will there be animals resistant to viral diseases?

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HealthNews

Sri Lanka bans the sale of pork to stop ASF and PRRS spread

Sri Lanka has temporarily prohibited the slaughter, transport, and sale of pigs to prevent disease spread.