African Swine Fever Alert: Why Air Filtration Still Matters in Pig Farming
Recent cases of African Swine Fever (ASF) detected in Taiwan have raised fresh concerns across the livestock industry.
Although ASFV is not primarily airborne, air filtration systems remain a crucial part of modern farm biosecurity.
Why Pig Farms Need Air Filters
In high-density production zones, the air carries not only dust and odors but also potential airborne pathogens such as Porcine Reproductive and Respiratory Syndrome Virus (PRRSV).
These viruses can travel through aerosols over long distances, which is why multi-stage air filtration has become standard in advanced farms across Europe, Japan, and the United States.
Most modern pig facilities are now equipped with primary filters and V-bank medium-efficiency filters in every ventilation stage to reduce infection risks.
Filtration Stages and Protection Mechanisms
- Primary Filters (3–10 µm): Block dust, insects, and larger virus-carrying particles
- Medium Filters (MERV 14–16): Capture finer aerosols and airborne contaminants
- V-bank Design: Maintains high airflow with low pressure drop
- Custom Sizing & Frames: Suitable for barns, feed mills, and biotech facilities
Such systems can effectively reduce PRRSV transmission, improve air quality, and promote healthier, more productive herds.
What About ASFV Protection?
Current research indicates that ASFV spreads mainly through contact, contaminated meat, or insect vectors,
so air filtration has limited direct effect.
However, maintaining clean, well-ventilated air reduces secondary infections and strengthens overall herd immunity —
making it an essential part of a comprehensive biosecurity strategy.
HENCOLIN’s Recommendation for Pig Farmers
HENCOLIN suggests implementing a step-by-step air defense plan:
1️⃣ Install moisture-resistant pre-filters at air intakes
2️⃣ Use medium-efficiency V-bank filters for main ventilation systems
3️⃣ Monitor pressure drop and replace filters regularly (every 3–6 months)
These practices not only reduce the entry of pathogens but also improve ventilation efficiency and animal welfare.
❓FAQ
Q1: Can air filters prevent African Swine Fever (ASF)?
A: Not completely. ASFV is mainly spread through contact and contaminated materials, but filters can effectively reduce airborne PRRSV and other pathogens, improving overall farm biosecurity.
Q2: What filter grades are recommended for pig barns?
A: Use pre-filters (G4/MERV 8) combined with V-bank medium filters (MERV 14–16) for optimal airflow and protection. Custom sizing based on barn humidity and ventilation layout is also recommended.
