11,000 Pigs at Once: Why the Uiryeong ASF Outbreak Was Recorded as the '20th of the Year'
On February 23, 2026, the 20th African Swine Fever case of the year was confirmed at a pig farm in Uiryeong-gun, Gyeongnam. With an outbreak at a farm raising 11,000 pigs, even Gyeongnam, previously a clean zone, has fallen—effectively dismantling the last line of defense against nationwide ASF spread.
February 23rd: The Worst-Case Scenario Authorities Feared Became Reality
African Swine Fever (ASF) has been confirmed at a pig farm in Uiryeong-gun, Gyeongnam (raising 11,000 pigs). This is the 20th outbreak this year, with 12 cases concentrated in February alone, escalating to a 'national quarantine crisis' level.[1]
TL;DR
- ASF confirmed on February 23, 2026, at Uiryeong farm raising 11,000 pigs (20th case this year)
- 12 cases concentrated in February, already doubling last year's annual total (9 cases)
- Spread to previously clean zones including Gyeongnam, Jeonnam, and Jeonbuk—effectively nationwide infection
- Contaminated pork plasma protein feed confirmed as transmission route; widespread transmission via slaughterhouses suspected
- Cumulative culling reaches hundreds of thousands; heightened risks to pork prices and food security
The Facts: What Happened
What Makes Uiryeong Significant
The ASF Central Disaster Management Headquarters received a suspected ASF report from a pig farm in Uiryeong-gun, Gyeongnam on February 23 and confirmed the diagnosis through detailed testing.[2]
- Farm size: 11,000 pigs (large-scale operation)
- Outbreak sequence: 20th nationwide (74 cumulative cases since first outbreak in 2019)
- Regional significance: Second case in Gyeongnam in February, following Changnyeong (February 4)
February's Explosive Growth
| Month | Cases | Major Regions |
|---|---|---|
| January 2026 | 4 cases | Gangneung (Gangwon), Anseong/Pocheon (Gyeonggi), Yeonggwang (Jeonnam) |
| February 2026 (1-23) | 12 cases | Hwaseong/Pyeongtaek (Gyeonggi), Changnyeong/Uiryeong (Gyeongnam), Boryeong (Chungnam), etc. |
| All of 2025 | 9 cases | - |
February alone accounts for 133% of last year's entire annual total, exceeding quarantine authorities' control capacity.[3]
Transmission Mechanism: Why It Couldn't Be Stopped
1. Contaminated Plasma Protein Feed Route
In February 2026, pork blood contaminated with ASF virus entered the feed supply chain. ASF genes were detected in feed products containing pork-derived plasma protein.[4]
Suspected transmission route:
- Collection of infected pig blood at slaughterhouses
- Processing plasma protein → supply as feed ingredient
- Distribution of feed to pig farms nationwide
- Pigs consume feed → mass infection
This route is a leading hypothesis explaining simultaneous outbreaks across regions and time periods.
2. Collapse of Clean Zones
Gyeongnam, Jeonnam, and Jeonbuk, classified as ASF-free zones until February 2026, have all fallen. Chosun Ilbo reported on February 10: "African Swine Fever Penetrates Clean Zones… Essentially the Entire Territory at Risk."[5]
Cumulative cases by region:
- Gyeonggi: 33 cases (Anseong, Pocheon, Hwaseong, Pyeongtaek, etc.)
- Gangwon: 20 cases
- Chungnam: Multiple cases
- Gyeongnam: 2+ cases (Changnyeong, Uiryeong)
- Jeonnam: 1+ case (Yeonggwang)
- Jeonbuk: Multiple cases
3. Transmission Through Illegally Imported Livestock Products
The Ministry of Agriculture, Food and Rural Affairs identified "illegal imports of livestock products from affected countries and indirect transmission via foreign workers and travelers" as major transmission factors.[6]
Stakeholders: Who's Involved
Pig Farmers
- Culling scale: Uiryeong 11,000 + Changnyeong 3,900 = 14,900 in Gyeongnam alone
- Economic impact: Compensation per head + farm facility restoration costs
- Restocking restrictions: Long-term movement restrictions within 10km radius of outbreak farms
Consumers
- Upward pressure on pork prices: Supply reduction → price increase → consumption hit after Lunar New Year holidays
- Increased dependence on imports: Domestic avoidance psychology + supply shortage → expanded imports from US and Europe
Government and Quarantine Authorities
- Minister Song Mi-ryung (MAFRA): Head of Central Disaster Management Headquarters, 24-hour emergency operations
- Gyeongnam Provincial Government: Movement restrictions and clinical testing for 14 farms within 10km of outbreak site
- Budget requirements: Culling compensation + quarantine personnel + disinfection equipment
International Community
- Risk of losing disease-free status: Expansion of countries banning Korean pork imports
- WOAH (World Organisation for Animal Health) reporting: Continued classification as ASF-affected country
Persistence: How Long Will This Last
Short-term (1-3 months): Focused Culling
- Culling of Uiryeong's 11,000 pigs + additional culling at surrounding farms
- Temporary movement suspension order across Gyeongnam (24 hours)
- Disinfection checkpoints at highway rest areas and local government boundaries
Mid-term (3-6 months): Accelerated Vaccine Introduction Debate
Korea currently maintains a culling-focused quarantine approach, but nationwide spread is increasing pressure for vaccine introduction. While some European countries have switched to vaccination, introducing vaccines delays recovery of disease-free status.
Long-term (1+ years): Structural Quarantine System Overhaul
- Feed supply chain tracking system: Ban or comprehensive testing of plasma protein use
- Enhanced slaughterhouse quarantine: Protocols to block entry of ASF-infected pigs
- Dispersion of pig farming clusters: From Gyeonggi/Chungnam concentration → nationwide distribution policy
Secondary Issues: Derivative Concerns
Pork Price Surge vs. Consumption Decline
Culling reduces supply and raises prices, but ASF fears reduce consumption and lower prices. Post-Lunar New Year 2026 consumer sentiment will determine future price direction.
Deepening Import Dependence
Domestic production decline → expanded imports from US, Spain, Germany → declining food self-sufficiency rate → national security risk
Accumulating Farmer Fatigue
Repeated culling for 7 years since the first outbreak in 2019 is accelerating exodus from pig farming. Farmer complaints are mounting: "How can we restock when we don't know when it'll hit again?"
Risk Checklist
False Reporting Risk: Low
- Official press release from Ministry of Agriculture, Food and Rural Affairs (published on Policy Briefing)
- Cross-verified by multiple media outlets including Kookje Daily, Yonhap News, Farmers' Newspaper
Fear-Mongering: Medium
- ASF does not infect humans (confirmed by FAO and WHO)
- Consuming infected pork poses no human health risk
- However, economic and quarantine damage is genuinely severe
Investment Overheating: Not Applicable
- Not a livestock investment-related issue
Privacy: Low
- Farm location (Uiryeong-gun) disclosed, but farm owner identity kept private
- Deemed essential information disclosure for quarantine measures
Reference Links
- Korea Policy Briefing - ASF Outbreak at Uiryeong Pig Farm
- Kookje Daily - Gyeongnam Uiryeong 20th ASF Case
- Chosun Ilbo - ASF Penetrates Clean Zones
- DailyVet - ASF Genes Detected in Pork Plasma Protein Feed
- Regional Administration News - Nationwide ASF Status
Images Unavailable
Reason: Access to quarantine control zones restricted and filming inside farms prohibited. No on-site images included in official MAFRA press releases. Alternative images (illustrations/archive photos) avoided to prevent misunderstanding; text-focused composition used instead.