Foot-and-mouth disease (FMD) remains a critical threat to global animal husbandry and trade, with the FMDV SAT1 serotype breaking its traditional endemic boundaries in sub-Saharan Africa and causing widespread outbreaks across the Middle East, Caucasus and North Africa since 2025.
Advanced Detection and Prevention Strategies for Foot-and-Mouth Disease, with Focus on SAT1 Epidemic Prevention
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Introduction to Foot-and-mouth disease and Prevention Principles
Foot-and-mouth disease (FMD) is a highly contagious viral disease of cloven-hoofed animals caused by foot-and-mouth disease virus (FMDV), severely impairing livestock productivity and restricting global animal trade . FMDV has seven serotypes with no cross-protective immunity, making universal prevention challenging. Latent infection, rapid transmission, and frequent viral mutation further complicate epidemic control. Modern FMD prevention relies on integrated biosecurity, vaccination, and surveillance, where accurate and timely detection serves as the core foundation for early warning and epidemic elimination.
Recent Epidemic Status of FMDV SAT1
SAT1, one of the African territorial serotypes, was historically endemic in sub-Saharan Africa . However, recent surveillance data confirms its continuous cross-regional spread to the Middle East, Caucasus and North Africa since 2025, triggering multiple regional outbreaks . Unlike traditional endemic strains, emerging SAT1 variants exhibit stronger environmental adaptability and asymptomatic shedding characteristics. Conventional O/A serotype vaccines provide limited protection against SAT1, while traditional detection methods show poor strain adaptability, creating an urgent demand for serotype-specific diagnostic tools .
Core FMD Detection Technologies and DIVA Strategy
Current FMD detection systems consist of virus direct detection and serological detection, supplemented by the Differentiating Infected from Vaccinated Animals (DIVA) strategy to form a precise diagnostic system .
Virus direct detection covers three mainstream approaches. Serotype-specific real-time RT-PCR acts as the laboratory gold standard, enabling sensitive and quantitative identification of SAT1 and other prevalent strains from clinical samples . Portable lateral flow assays support 5–10 minute on-site antigen screening for suspected cases without professional equipment. Traditional virus isolation guarantees ultimate detection accuracy but is only applied for strain identification due to its long cycle.
DIVA detection strategy solves the bottleneck of distinguishing vaccine-induced antibodies from natural infection antibodies. Inactivated vaccines only produce structural protein (SP) antibodies, while natural infection induces both SP and non-structural protein (NSP) antibodies. Combined SP/NSP-ELISA detection effectively screens latent infected animals in immunized herds, supporting herd purification and epidemic assessment recommended by WOAH and FAO .
Tiered Detection Strategies for Different Scenarios
Targeted tiered detection strategies are formulated based on the differentiated demands of large-scale farms and smallholder farmers to balance accuracy, efficiency and cost.
Large-scale intensive farms prioritize high-precision regular surveillance and latent infection purification. The standardized workflow combines monthly/quarterly real-time RT-PCR batch sampling for SAT1 monitoring, regular DIVA serological evaluation for immune and infection status assessment, and on-site rapid screening for suspected cases, forming a closed-loop epidemic prevention system of “screening-monitoring-purification”.
Small-scale farmers focus on low-cost and convenient emergency prevention. Portable rapid detection kits are applied for daily random screening and high-risk season enhanced monitoring to quickly intercept suspected infections. Regular serological testing is cooperated with local animal health departments to reduce breeding costs while ensuring basic biosecurity.
The Ringbio FMDV test solution
Tailored to SAT1 epidemic characteristics and tiered industry detection demands, our company provides a full-series WOAH-compliant FMD detection solution covering laboratory precision diagnosis and grassroots on-site screening. The product lineup includes SAT1-specific real-time RT-PCR kits, standardized DIVA ELISA kits, and portable lateral flow rapid detection reagents.
| Product Items | Principle | Test Samples | Scenarios for Application |
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| RT-PCR | Various biological samples |
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| ELISA | Serum, plasma |
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| DIVA ELISA | Serum, plasma |
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| Rapid Test | Various samples |
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Conclusion
The cross-border spread of FMDV SAT1 has brought new challenges to global livestock epidemic prevention. Graded detection strategies matching breeding scale, combined with serotype-specific and DIVA diagnostic technologies, are essential for precise FMD control. Our full-scenario detection products effectively meet the differentiated needs of large-scale farms and small-scale farmers, providing reliable technical support for global FMD early warning, surveillance and herd safety guarantee.
References
- FAO. Rapid Risk Assessment: Foot-and-Mouth Disease (FMD) Virus Serotype SAT1. 2026. Retrieved from https://www.fao.org/animal-health/rapid-risk-assessment-fmd/en
- Ehizibolo D O, et al. Emergence of a Novel SAT1 Topotype of Foot-and-Mouth Disease Virus in West Africa. Viruses, 2017, 9(8): 236.
- WOAH-FAO Reference Laboratory Network. Lineage-Specific FMDV Real-Time RT-PCR Assays for SAT1 Surveillance. 2026. Retrieved from https://foot-and-mouth.org/further-information/lineage-specific-fmdv-real-time-rt-pcr-assays
- Maree F, et al. Circulation and Evolution of SAT-Type Foot-and-Mouth Disease Viruses in Africa. Frontiers in Veterinary Science, 2025, 12: 1128967.