Pseudorabies Resources: Latest PRV Fact Sheet (Updated June 2024) & Additional PRV Resources/Links & Statement
Pseudorabies Resources: Latest PRV Fact Sheet (Updated June 2024) & Additional PRV Resources/Links & Statement
The Swine Health Information Center, launched in 2015 with Pork Checkoff funding, protects and enhances the health of the US swine herd by minimizing the impact of emerging disease threats through preparedness, coordinated communications, global disease monitoring, analysis of swine health data, and targeted research investments.
In a press release dated June 3, 2026, USDA Animal and Plant Health Inspection Service confirmed the detection of New World screwworm (NWS) in a 3-week old calf in Zavala County, Texas. NWS larvae were identified in the calf’s umbilical area. NWS was eradicated from the US in the 1960s other than a localized outbreak in Key deer in Florida in 2016-2017. NWS does not pose a risk to food safety and USDA’s Food Safety and Inspection Service ensures the nation’s food supply is safe. After re-emergence of NWS in Mexico in November 2024, the Swine Health Information Center has closely monitored NWS spread, hosted a webinar on the pest, and developed a new fact sheet for swine producers and other industry stakeholders.
NWS is a parasitic fly whose larvae feeds on the living tissue of warm-blooded animals including livestock, pets, wildlife, and in rare cases, people. Larval infestations (myiasis) can occur in any broken or damaged skin and cause rapidly progressing, painful wounds that can lead to serious injury or death if left untreated.
The USDA APHIS release also said, “USDA and Texas officials are taking immediate action to contain and eradicate NWS from the United States, following the strategies and actions outlined in the NWS Response Playbook.” In response to the detection, authorities have established a unified incident command structure and implemented a comprehensive containment strategy, including quarantines, movement controls, enhanced surveillance, increased sterile fly release, expanded trapping efforts, wildlife monitoring, and targeted local outreach. These measures are designed to contain NWS infestation, prevent its spread, and accelerate eradication efforts.
NWS re-emerged in Mexico in November 2024. USDA increased monitoring, prevention, and mitigation practices to address this emerging disease threat to domestic livestock. Those efforts include ongoing aerial dispersion of sterile NWS flies in Mexico and along the Texas border to curb fly population growth as well as active surveillance for NWS flies in border states.
Read about NWS being discovered in Mexico in 2024 here.
Visit the Mexican government NWS dashboard here for the latest reporting data.
Swine producers can prepare for NWS by understanding the fly’s behavior and life cycle, identifying production and housing conditions that increase the risk of myiasis, implementing effective biosecurity, environmental, and wound management practices, knowing the response procedures for suspected infestations, and developing an NWS disaster management plan. Monitoring for clinical signs of NWS in swine remains critical, including nonhealing wounds, wounds with foul odor, biting or licking at wounds, depressed behavior, inappetence, and visible larvae in wounds. Any suspect cases of NWS should be reported immediately to state and/or federal animal health officials.
For more information, NWS resources are available here:
The 100th Swine Health Information Center Domestic Swine Disease Monitoring Report was published this month, marking an important milestone for the Swine Disease Reporting System (SDRS) and the broader US pork industry. Since its launch in 2018, SDRS has evolved from a focused diagnostic reporting effort into a nationally and internationally recognized framework for near real-time swine disease monitoring, analytics, communication, and preparedness. SHIC has served as the project’s primary funding and communication partner, helping guide development of a resource designed to strengthen US swine health and biosecurity.
Find both the special 100th edition and June reports here.
Continual Improvement Through Measured Expansion
From SHIC’s perspective, SDRS represents a model of continual improvement driven by practical industry needs. The project initially focused on aggregated PCR diagnostic data for key endemic pathogens, including PRRSV, PEDV, PDCoV, and TGEV, from the Iowa State University and University of Minnesota veterinary diagnostic laboratories. Goals of the project are based around consistent collection and reporting of data from multiple sources in a standardized format for comprehensive swine health trend analysis.
Over time, the system expanded to include additional diagnostic laboratory partners: Kansas State University, South Dakota State University, Purdue University, Ohio Animal Disease Diagnostic Laboratory, and is currently in the progress to include data from Illinois Veterinary Diagnostic Laboratory. Together, these additions create a broader national infrastructure capable of delivering increasingly representative disease insights across US swine production regions.
SDRS has also steadily expanded its analytical capabilities. Additional surveillance targets including influenza A virus, M. hyopneumoniae, PCV2, PCV3, and E. coli PCR genotyping were incorporated, while PRRSV ORF5 sequencing efforts broadened national surveillance capacity. The PRRSV ORF5 Blast comparison tool offers one of a kind opportunity for a producer to compare their own PRRSV ORF5 sequences and identify similar sequences recovered at any of the six participant laboratories. Benchmarking tools, disease index rankings, confirmed tissue diagnoses, and exploratory outbreak-detection modeling have enhanced the practical value of the system for veterinarians and producers seeking actionable information rather than isolated diagnostic results.
Accessible, Trusted Industry Communication
SDRS has evolved into a highly accessible communication platform. In addition to monthly PDF reports published in the SHIC newsletter, the system now includes online dashboards, podcasts, bilingual video updates with English and Spanish captions, and enhanced graphical summaries designed to improve interpretation and broaden engagement across the industry. This commitment to accessibility reflects SHIC’s mission to ensure swine health information reaches producers, veterinarians, diagnosticians, and industry stakeholders in formats that support informed decision-making.
Industry adoption reflects the value of that investment. SDRS distribution has grown from 43 subscribers in 2018 to more than 800 recipients by April 2026, including veterinarians, producers, diagnosticians, researchers, and allied industry professionals. In 2025, the Domestic Disease Monitoring Reports became the most frequently accessed swine health resource on the SHIC website, demonstrating the industry’s reliance on timely and credible disease information.
Delivering Practical Value to Pork Production
The strength of SDRS lies in its ability to place diagnostic data into broader regional, seasonal, and production-system context. By aggregating routinely generated diagnostic laboratory information from across the country, SDRS helps users identify emerging disease trends, compare regional pathogen activity, monitor strain dynamics, and recognize unusual shifts before they become widespread industry challenges. Veterinarians frequently describe SDRS as an early warning system that supports proactive herd health decisions, biosecurity planning, and communication with producers and system leadership.
This capability aligns directly with SHIC’s mission to protect the health of the national swine herd through coordinated disease monitoring, preparedness, and response. SDRS has strengthened industry-wide awareness of major endemic diseases while helping stakeholders distinguish expected seasonal patterns from emerging abnormalities that may require additional mitigation efforts.
Supporting Research, Collaboration, and Industry Preparedness
Another defining strength of SDRS is its collaborative structure. The project successfully integrates expertise from universities, veterinary diagnostic laboratories, practicing veterinarians, production systems, and industry organizations. This cooperative approach has strengthened trust in the data and encouraged widespread industry adoption.
Beyond surveillance, SDRS data have contributed to 10 peer-reviewed scientific publications and supported graduate training opportunities in applied swine health analytics. The system has become an important training platform for the next generation of swine health professionals working at the intersection of diagnostics, epidemiology, and decision-making.
Importantly, SDRS findings have also informed broader industry and governmental initiatives, including discussions supporting the $2.5 million research initiative led by SHIC focused on improved biosecurity in Wean-to-Harvest systems. These outcomes demonstrate how SHIC’s investment in SDRS continues to generate value far beyond routine reporting by supporting coordinated, science-based responses to emerging disease challenges.
Looking Ahead
As SDRS moves beyond its 100th edition, the system continues to evolve through careful stewardship, collaboration, and practical innovation. Supported by SHIC and shaped by ongoing industry participation, SDRS has become a foundational component of US swine health infrastructure — providing timely, standardized, and actionable information that strengthens preparedness, supports biosecurity, and helps protect the long-term sustainability and competitiveness of the US pork production industry.
To better understand how swine viruses spread during transport, the Swine Health Information Center funded a Wean-to-Harvest Biosecurity Research Program study focused on the unloading process at the harvest plant, in partnership with the Foundation for Food & Agriculture Research and Pork Checkoff. Led by Drs. Cesar Corzo and Lucas Ferreira at the University of Minnesota, the study tracked the presence of four major pathogens affecting the swine industry as a method to assess trailer contamination dynamics during unloading. Additional objectives were to identify key factors such as season, cleaning practices, and driver behaviors that influence contamination risk. Proper washing, disinfection, and drying of trailers significantly reduce viral contamination risk, while seasonal conditions strongly influence virus presence, requiring adjusted biosecurity strategies year-round.
Read the industry summary of study #24-077 here.
Harvest facilities are recognized as important nodes in the swine industry that contribute to disease transmission networks, yet quantitative data describing environmental contamination dynamics remain limited. The primary objectives of the study were to determine whether trailer contamination increases during pig unloading at the harvest plant and to identify factors such as seasonality, trailer sanitation practices, and driver behaviors that contribute to contamination risk. The study evaluated the occurrence of four swine viruses: porcine reproductive and respiratory syndrome virus (PRRSV), porcine deltacoronavirus (PDCoV), porcine epidemic diarrhea virus (PEDV), and Senecavirus A (SVA) in a commercial harvest plant located in the Midwest. Depending on the virus, between half and over seventy percent of dock samples tested positive. This indicates that the unloading area is a major hotspot for pathogen presence. A substantial proportion of trailers were already contaminated when they arrived at the plant; however, contamination levels increased further after unloading for all viruses evaluated. This demonstrates that trailers not only bring pathogens into the facility but can also acquire additional contamination during the unloading process.
To perform the study, sampling was conducted every two weeks over a one-year period at the commercial harvest facility. Prior to pig unloading, drivers were approached and asked to participate in a short biosecurity trailer survey. If drivers agreed, surveys were completed immediately and data was collected on trailer cleanliness, trailer origin and destination, driver biosecurity practices during unloading, and whether plant employees enter the trailer during the unloading process. Environmental samples were then collected from 1) the unloading dock, 2) the trailer upon arrival before unloading pigs, and 3) the same trailer after unloading prior to departure. Trailer samples were collected by rubbing a sterile cloth moistened with media across a 1ft x 1ft floor area of the compartment in front of the trailer back door.
A total of 389 environmental samples were collected across 26 sampling events and tested via PCR to detect viral genetic material. Additional information gathered during each visit included temperature and humidity, trailer cleaning and disinfection protocols, type of animals transported, unloading conditions, and driver-related factors such as personal protective equipment use, training, and experience.
Results showed that unloading docks are consistently contaminated at high rates throughout the year. Detection of pathogens across dock samples had positivity rates of 71.2% for PDCoV, 61.9% for PEDV, 51.7% for PRRSV, and 48.1% for SVA. Many trailers arrived at the harvest plant already contaminated; however, contamination rates increased further after unloading for all the pathogens studied. Notably, 74.6% of trailers that arrived negative for all tested viruses departed contaminated with at least one pathogen, confirming that unloading market hogs at harvest facilities can serve as important amplification points for disease spread.
Distinct seasonal patterns were also observed. PDCoV and PEDV were detected more frequently during winter and fall months, with contamination at the dock 4 – 10X higher in these seasons compared to summer. PRRSV had higher detection during fall and spring, while SVA showed increased contamination risks during warmer summer periods. These findings suggest that environmental conditions influence viral detection dynamics perhaps as a consequence of viral transmission in the finishing pig population which leads to hauling actively shedding pigs to the plant, highlighting the need for year-round biosecurity vigilance.
Trailer sanitation practices were among the most important controllable risk factors identified through the survey. Trailers that were properly washed, disinfected, and dried before arrival had significantly lower contamination rates than inadequately sanitized trailers. In addition, trailers used for both swine and cattle transport showed higher contamination risk for certain pathogens, suggesting that multi-species transport may be contributing to pathogen spread.
The study also identified opportunities to improve driver biosecurity awareness and training. Many drivers reported using PPE primarily for cleanliness rather than disease prevention, and formal biosecurity education was often limited in scope. Inconsistent PPE use and inadequate understanding of disease transmission may increase the risk of indirect pathogen spread through contaminated clothing and equipment during transportation.
Key Observations:
Overall, findings demonstrate that harvest facilities represent critical control points in swine pathogen dissemination. The study provided evidence that trailer contamination increases after unloading, showing cross-contamination between docks and transport vehicles. The interaction between contaminated docks and trailers creates an ongoing cycle of contamination that can transport pathogens back to farms. These results reinforce the importance of assuming all trailers returning from harvest facilities are contaminated and ensuring they undergo thorough cleaning, disinfection, and drying prior to reuse. Enhanced seasonal biosecurity measures, improved driver training, minimizing unloading risks, and avoiding multi-species transport provide opportunities to reduce pathogen transmission and help protect herd health.
Foundation for Food & Agriculture Research
The Foundation for Food & Agriculture Research (FFAR) builds public-private partnerships to fund bold research addressing big food and agriculture challenges. FFAR was established in the 2014 Farm Bill to increase public agriculture research investments, fill knowledge gaps and complement the U.S. Department Agriculture’s research agenda. FFAR’s model matches federal funding from Congress with private funding, delivering a powerful return on taxpayer investment. Through collaboration and partnerships, FFAR advances actionable science benefiting farmers, consumers and the environment.
Swine Health Information Center
The Swine Health Information Center, launched in 2015 with Pork Checkoff funding, protects and enhances the health of the US swine herd by minimizing the impact of emerging disease threats through preparedness, coordinated communications, global disease monitoring, analysis of swine health data, and targeted research investments. As a conduit of information and research, SHIC encourages sharing of its publications and research. Forward, reprint, and quote SHIC material freely. For more information, visit http://www.swinehealth.org or contact Dr. Megan Niederwerder at [email protected] or Dr. Lisa Becton at [email protected].
Porcine sapovirus (PoSaV) is an emerging pathogen that causes diarrhea and weight loss in pigs during weaning and post-weaning. Because isolation of circulating field strains remains a challenge, the Swine Health Information Center funded a study led by Dr. Quihong Wang at The Ohio State University to characterize and isolate contemporary PoSaV strains and to evaluate antibody responses in the colostrum and milk of sows/gilts immunized with a PoSaV vaccine. Results indicate that a new cell line supports PoSaV propagation, a benefit to producers and their veterinarians seeking diagnostics, and confirm that vaccination boosts antibody titers in colostrum and milk, although future vaccination-challenge studies are warranted.
Read the industry summary of study #23-073 here.
As an emerging swine industry disease with the potential to affect pigs of all ages, the assessment of vaccine performance against PoSaV is critical to prevent production losses. Eight PoSaV genogroups have been identified, with GIII being the most prevalent worldwide. The isolation of field strains in cell lines remains a significant challenge to enable development of autogenous vaccine candidates for PoSaV disease control and prevention on farms. Therefore, the objectives of this project were to 1) isolate contemporary PoSaV strains in cell culture, 2) evaluate viral neutralizing (VN) antibody responses in the colostrum/milk of gilts/sows immunized with a commercial PoSaV vaccine, and 3) correlate the VN antibody titers with piglet performance such as body weight.
Dr. Wang’s paper on objectives 2 and 3 was recently published in the journal Pathogens. Read the paper here.
To characterize and isolate contemporary US PoSaV strains, forty-two clinically suspicious fecal and intestinal samples were collected from diarrheic pigs in late lactation across five farms for PoSaV PCR testing. Positive samples were then serially passaged in swine testicular (ST) cells, porcine kidney (LLC-PK1) cells, and porcine intestinal epithelial (IPEC-J2) cells. PoSaV replication was confirmed by testing both viral nucleic acids and antigens. Additionally, the genomes of representative positive samples were sequenced.
Overall, PoSaV detection rate was 60% (25/42). Representative GIII PoSaV strains shared 87.5%-87.7% nucleotide identity in the viral capsid protein with the prototype GIII PoSaV Cowden strain detected 40 years ago. The success rates for isolating field PoSaV samples were 8% (2/25) in ST cells, 16% (8/25) in LLC-PK1 cells, and 0% (0/10) in IPEC-J2 cells. Importantly, this represents the first successful isolation of PoSaV in ST cells, creating new opportunities for future viral pathogenesis and vaccine research.
For objectives 2 and 3, a commercial swine farm with approximately 650 sows and gilts operating on a 4-week batch farrowing system was utilized. A total of 30 animals were randomly assigned to two groups: vaccination and non-vaccination, with each group comprising 15 animals (two gilts and 13 sows). For the vaccination group, animals were immunized intramuscularly with a PoSaV vaccine at gestation day (GD) 73 – 75 (about 5 weeks pre-farrowing) and at GD 94 – 96 (about two weeks pre-farrowing). Body weights of individual piglets were obtained at birth and at 3 weeks of age. Colostrum and milk samples collected at parturition, one week, two weeks, and three weeks post-farrowing were tested for VN antibody titers. Rectal swab samples from the sows/gilts and three piglets per sow/gilt at 2 weeks and 3 weeks of age were tested for PoSaV shedding.
All rectal swab samples from sows and piglets in both groups tested negative for PoSaV, indicating no PoSaV was circulating among these pigs during the study period. Both groups of piglets had similar weights at birth and at 3 weeks of age and piglet growth performance did not differ between treatment groups.
Additional results indicated that sows and gilts within the same group had similar levels of VN antibody titers at each time point. Colostrum samples contained high VN antibody titers (> 10^4.5 VNT50/mL), with the vaccinated group having significantly higher antibody titers in colostrum (p < 0.01) compared to the non-vaccinated group. Further, the vaccinated group maintained significantly higher (p < 0.05) VN antibody titers in the milk at 1-week post-farrowing but had no significant differences at 2 and 3 weeks post-farrowing compared to the non-vaccinated group.
These results indicate that sows/gilts had been exposed to PoSaV natural infection prior to vaccination and that vaccination boosted the existing immunity. The high antibody levels in both groups of sows/gilts may have provided full protection for piglets against PoSaV infection at this farm, although the threshold level of VN antibodies needed for PoSaV protection has not been determined. These findings indicate that vaccination effectively boosted pre-existing immunity; however, additional vaccination-challenge studies are needed to determine vaccine efficacy in naïve pigs since no PoSaV shedding was detected.
Overall, this project advances understanding of contemporary PoSaV biology, establishes a novel virus isolation platform, and provides the first evaluation of a prescribed PoSaV vaccine produced under commercial conditions. Expanding the potential for PoSaV isolation in the ST cell line offers a promising avenue for the development of effective diagnostic tools and vaccines against PoSaV. Advancing tools for PoSaV aligns with SHIC’s mission to generate knowledge and mitigate the potential impact of emerging disease threats for the US swine industry.
The Swine Health Information Center Board of Directors recently voted to renew the Global Swine Disease Monitoring Report agreement with the University of Minnesota through 2027. Led by Dr. Maria Sol Perez Aguirreburualde, the team has developed and published more than 100 reports since 2017 utilizing data of near real-time global swine disease surveillance information. Since inception, the GSDMR has expanded coverage of swine diseases using scientific and public literature, which will soon be available on a global dashboard being developed. Funded by SHIC as part of its mission to identify emerging disease threats, the monthly reports are published in the SHIC newsletter and serve as a frequently accessed resource for the swine industry on the SHIC website.
Read the final report for SHIC study #24-002 here.
The GSDMR team researches and engages a network of global collaborators to provide and give context to swine disease reporting and information. The GSDMR process includes a stepwise screening procedure to identify swine disease-related events that may represent a risk for the US swine industry. Those events are identified, scored, and reported monthly. A technical team then synthesizes and frames each section of the report, facilitating interpretation by the audience. After a multi-step review phase to verify, edit, and/or expand information, in collaboration with key technical informants and a network of US and international stakeholders, a report is published by SHIC monthly.
In extraordinary circumstances, rapid response is provided through immediate release reports for health events requiring prompt communication to the industry (e.g., the first African swine fever outbreak in the Dominican Republic and Haiti in 2021, FMD incursion in Germany in 2025, and ASF detection in Spain in 2025). To continue improving and expanding the GSDMR, the first evidence generated on the opportunities and challenges of integrating AI tools into event-based surveillance systems was captured and evaluated last year.
In an April 2026 article published by the University of Minnesota’s “News of the Swine Group” blog about the 100th GSDMR it was written, “When the first report was published, African swine fever had not yet reached Asia or the Americas, Japanese encephalitis virus had not emerged in southeastern Australia, and the transboundary spread of foot-and-mouth disease virus serotypes from East Africa into Western Asia was not yet an established pattern. What these reports document collectively is not simply a list of disease events but a consistent trajectory: pathogens moving farther and through more diverse pathways, the role of wildlife reservoirs becoming better understood but still harder to manage, and the genetic complexity of circulating viruses increasing. The illegal movement of animals and animal products, the limits of single-intervention strategies, and the importance of sustained multilateral surveillance are consistent themes across 100 editions.”
The GSDMR continues to inform US pork producers about ASF outbreaks remaining dynamic in Asia and Europe. While ASF containment in Hispaniola has been successful, the virus remains endemic in the Dominican Republic where its status is carefully monitored and reported. In 2025, FMD activity and serotype shifts across regions reaffirmed the need for ongoing monitoring and rapid interpretation provided by the GSDMR.
Because transboundary animal diseases (TADs) are an evolving and intensifying concern, the need for and usefulness of the GSDMR continues to increase. TAD events reinforce a core lesson first highlighted during the 2013 porcine epidemic diarrhea virus outbreak: the swine industry requires robust, real-time situational awareness to anticipate, prepare for, and respond to emerging threats.
The coordinated approach employed by the GSDMR team enhances situational awareness, supports informed decision-making, and reinforces national prevention and mitigation strategies against foreign and transboundary animal disease incursions. Ultimately, the system developed through this long-term collaboration contributes directly to early detection, improved readiness, and sustained industry resilience in the face of an increasingly complex global TAD landscape.
The 93rd General Session of the World Assembly of Delegates for the World Organisation for Animal Health was convened from May 18 – 22, 2026, in Paris, bringing together international animal health authorities from 183 member countries to establish global standards impacting livestock industries worldwide. This year, the US pork industry was represented by Swine Health Information Center Executive Director Dr. Megan Niederwerder and National Pork Producers Council Director of Swine Health Dr. Anna Forseth, who were invited to join the US delegation by USDA, the official WOAH delegate body. The presence and participation of the US delegation underscore the critical role of international collaboration in safeguarding domestic swine health and trade.
The 2026 General Session marked the 30th anniversary of WOAH’s official animal health status framework. The General Session is WOAH’s most important institutional event, providing an opportunity for delegates to adopt international standards, discuss technical topics of global interest, adopt administrative and technical resolutions, examine and approve various reports, and proceed with the election of vacant positions within certain governance bodies. During the meeting, WOAH announced new disease-status recognitions and endorsements of national control programs, including recognition of classical swine fever-free zones in Bolivia and Colombia, underscoring continued international progress in managing transboundary animal diseases.
As part of the General Session, WOAH organized a Forum themed “Investing in Animal Health and Welfare to Secure Everyone’s Future,” which highlighted the strategic role of animal health in economic stability, food security, and global health resilience. It explored solutions ranging from national resource prioritization and innovative financial partnerships to private sector engagement and research-based innovation. Discussions emphasized the importance of animal health in protecting global food security, economic stability, and public health through the One Health framework, which recognizes the interconnectedness of animal, human, and environmental health.
Delegates also approved WOAH’s 8th Strategic Plan and reviewed governance reforms aimed at modernizing the organization’s regional commissions and evaluating member-country financial contributions. Leaders, ministers, and veterinary organizations from around the world participated in discussions supporting science-based animal health policies and highlighting the critical role of veterinarians in disease prevention and response.
While the annual General Session serves as one of the world’s most influential forums for shaping international animal health, coordinated side events held alongside the General Session provide opportunities for further information sharing and collaboration. Drs. Niederwerder and Forseth participated in the side events entitled “HPAI vaccination and trade,” “Towards a Stronger Global FMD Control Strategy: Responding to an evolving risk landscape,” and the “4th Meeting of the GF-TADs Global Coordination Committee on African Swine Fever.”
During the FMD event, a concise global update on the status of the virus was shared along with an outline of key issues and priorities to support countries experiencing outbreaks. A global epidemiological overview of current FMD situations, along with emerging needs and challenges in surveillance, laboratory diagnosis, vaccination, and outbreak management was shared. Participants discussed priorities and mechanisms for enhancing disease control in affected countries. High level orientations for the revision of the Global FMD Control Strategy were discussed to identify strategic gaps and priorities for effective, sustainable, and high-impact actions. More details on the coordinated events are available here.
This month’s Domestic Swine Disease Monitoring Report celebrates the 100th edition and highlights several key findings. PRRSV overall case positivity has shown an upward trend since the beginning of 2026, despite the transition into the summer months. IAV activity was slightly lower in May compared to April and although elevated, remains within the expected range. Continued declines in adult/sow farm IAV case positivity since early 2026 were noted, contrasted by rising IAV case positivity in wean-to-market sites since February. MHP showed an uptick in May in wean-to-market sites, with case positivity remaining below 20% throughout 2026, while adult/sow farm case positivity remains lower at below 10%. This month’s bonus page celebrates the 100th edition of SDRS, highlighting its role as a collaborative framework supporting US swine health. The accompanying podcast features Dr. Paul Yeske, senior veterinarian at the Swine Vet Center, who discusses emerging higher-virulence PRRSV variants, progress toward MHP elimination, opportunities to improve biocontainment in growing sites, and his perspective on SDRS’s contributions to the swine industry.
In this month’s Global Swine Disease Monitoring Report, read about African swine fever in Germany where the EUVET mission warns of continued risk of expansion in North Rhine-Westphalia. In Poland, the first outbreak of ASF in domestic pigs in 2026 has been reported, with more than 21,000 pigs affected. In Mongolia, the first detection of foot-and-mouth disease serotype SAT1 in the country has been reported.
PRRS Cumulative Incidence for MSHMP
PEDV Cumulative Incidence for MSHMP
This month’s report identifies seven PRRSV variants as VUM Category 2 or higher. Variant 1C.5.32 remains Category 4, while 1C.5 and 1C.2 have shifted from Category 4 to Category 3. Variants 1C.5.35, 1A.13.49, and 1H.18 remain in Category 3. Variant 1C.2.45, recently split from 1C.2, is now classified as Category 2. These changes are detailed in the current situation reports. All historical reports for variants previously reaching Category 2 or higher remain available for review.