Why Quarantine is the #1 Swine Biosecurity Practice
Quarantine is the most effective single intervention for preventing the introduction of new pathogens into a swine herd. New pigs — even those sourced from certified high-health suppliers — may carry subclinical infections with PRRS, Mycoplasma hyopneumoniae, Streptococcus suis, or Lawsonia intracellularis that only manifest under the stress of transport and new environments.
Standard quarantine requirements:
- Duration: 21 days minimum; 30–60 days for PRRS-negative or SPF herds
- Location: Separate building or airspace; minimum 500 ft from production barn in outdoor settings
- Equipment: Dedicated boots, coveralls, needles, and handling tools — never shared with production animals
- Ventilation: Separate air handling; no shared exhaust fans
What quarantine detects:
Most common swine pathogens have incubation periods of 7–21 days. A 21-day quarantine catches the majority of acute infections. Slower-developing conditions (e.g., ileitis, enzootic pneumonia) may require the full 30-day window.
Integrating Serology with Quarantine
Quarantine time alone is insufficient for a rigorous biosecurity program. Pair the countdown with a serology protocol:
1. Day 0 (Arrival): PCR for PRRS and PCV2; baseline serology panel
2. Day 21–30: Repeat ELISA for PRRS antibodies; if seropositive and your herd is PRRS-negative, do not move animals
3. Day 30–60 (PRRS-negative herds): Second ELISA; if still seronegative and antigen-negative, proceed with integration
Work with your veterinarian to design a testing protocol based on your herd's target health status and the risk profile of the source population.