Introduction
What is ASF? African Swine Fever (ASF) is a highly contagious and deadly viral disease affecting domestic and wild pigs. Caused by ASFV, it results in nearly 100% mortality in infected animals, with no effective vaccine or treatment available.
Why is it important? ASF represents a severe threat to global pig farming and food security. Its widespread impact leads to immense economic losses, disrupts international trade, and devastates the livelihoods of farmers worldwide.
Understanding ASF
The Pathogen: ASFV
An ASF virus (Asfarviridae family) - a resilient DNA virus.
The African Swine Fever Virus is a large, double-stranded DNA virus. It's known for its exceptional stability in the environment, surviving in meat, feces, and various surfaces for extended periods, making it challenging to control its spread. There are multiple genotypes of ASFV.
Transmission
Direct contact, contaminated feed, vehicles, vectors (ticks).
Transmission occurs through direct contact with infected pigs, ingestion of contaminated feed or pork products, and via biological vectors such as soft ticks (Ornithodoros genus). Contaminated fomites like vehicles, clothing, and equipment also play a significant role.
Clinical Signs
High fever, skin lesions, hemorrhages, high mortality.
Clinical signs include high fever, loss of appetite, lethargy, red blotchy skin lesions (especially on ears, snout, and abdomen), vomiting, diarrhea, and bloody discharges. Mortality rates can be as high as 100% in acute cases.
History & Spread
Prevention & Control
Robust biosecurity is the cornerstone of preventing and controlling ASF. Implementing stringent measures across all levels of pig farming is essential to mitigate the risk of disease introduction and spread.
Strict Biosecurity Measures
▼- Access Control: Implement strict visitor protocols, secure farm perimeters, and control entry/exit points for vehicles and personnel.
- Vehicle & Equipment Disinfection: Thoroughly clean and disinfect all vehicles and equipment entering or leaving the farm.
- Feed & Water Management: Source feed from safe suppliers, ensure proper storage, and provide clean, uncontaminated water.
- Personnel Hygiene: Enforce strict personal hygiene, including showering in/out and dedicated farm clothing/footwear.
Early Detection & Rapid Response
▼- Disease Surveillance: Implement regular monitoring of pig health and immediate reporting of any suspected ASF cases.
- Emergency Preparedness: Develop and practice contingency plans for rapid response, including culling procedures and carcass disposal.
- Movement Restrictions: Establish quarantine zones around outbreaks and enforce strict regulations on the movement of pigs, products, and equipment.
Wild Boar Management
▼- Population Control: Implement strategies for managing wild boar populations where they pose a significant risk to domestic pigs.
- Separation from Domestic Pigs: Use double fencing and other physical barriers to prevent contact between wild boars and farm animals.
- Wild Boar Surveillance: Monitor wild boar populations for ASF and dispose of carcasses safely.
International Cooperation
▼- Information Sharing: Collaborate with international bodies like WOAH and FAO, and share epidemiological data with neighboring countries.
- Coordinated Responses: Participate in regional and international efforts to control transboundary animal diseases.
- Research & Development: Support global initiatives for ASF vaccine development, improved diagnostics, and control strategies.
Economic Impact
ASF inflicts devastating economic losses on the global pig industry, disrupting trade and threatening livelihoods, particularly for smallholder farmers.
Estimated Direct Economic Losses (2010-2024)
Global Direct Losses: $200+ Billion USD (2010-2024)
5 Million+ Pigs: Culled or died due to ASF (2020-2024)
Indirect Losses
Impact on Pork Prices (2018-2023)
Smallholder farmers are particularly vulnerable to ASF outbreaks, often losing their entire livelihoods.
Resources & Further Information
Key Organizations
Educational Materials
Fact Sheets & Guides
Videos & Webinars
Posters & InfographicsFrequently Asked Questions (FAQs)
ASF is caused by the African Swine Fever Virus (ASFV), a DNA virus, while Classical Swine Fever (CSF) is caused by the Classical Swine Fever Virus (CSFV), an RNA virus. Both are highly contagious and can cause high mortality, but they are genetically distinct and require different diagnostic and control approaches.
No, ASF does not pose a direct threat to human health. It only affects pigs.
Immediately contact your local veterinary authorities. Isolate affected animals, restrict movement on and off your farm, and avoid moving any pigs or pig products.