Swine Trucks Remained Contaminated After Cleaning

Researchers found that North Carolina swine vehicles often carried infectious porcine epidemic diarrhea virus despite cleaning.

Updated on Oct. 6, 2026 in Home Cleaning

Bold vector editorial illustration of a metal drainage grate in concrete, representing agricultural sanitation challenges. — A recent study in North Carolina found that 38% of swine transport vehicles remained contaminated with infectious porcine epidemic diarrhea virus despite undergoing standard truck-wash cleaning procedures. AI Illustration. Upload story photo >

Live Poll

Do you trust current cleaning procedures to keep local swine farms safe from disease transmission?

A study conducted in North Carolina found that cleaning swine trucks failed to eliminate the porcine epidemic diarrhea virus (PEDV). Testing revealed that 38% of samples taken from vehicles at truck washes contained infectious virus particles.

Why it matters

The persistence of PEDV on transport vehicles poses a significant biosecurity risk for the swine industry. Infectious traces can lead to rapid disease transmission, potentially resulting in severe clinical illness among pig populations.

Researchers found that 88% of samples from eastern North Carolina swine trucks contained detectable PEDV RNA. Of those, 38% tested positive for the infectious virus, with the back-of-trailer locations showing the highest contamination levels.

The players

North Carolina State University

This institution served as the site for the swine bioassay testing unit.

National Animal Disease Preparedness and Response Program

This federal program provided the funding required to complete the study on swine vehicle biosecurity.

The details

Using reverse-transcription quantitative PCR, researchers evaluated the cleanliness of vehicles at three truck washes. Swine bioassays using 8-day-old piglets confirmed that the virus remained infectious, causing severe clinical signs within 48 hours of exposure.

Piglets exhibited clinical signs of PEDV within 48 hours of initial pilot bioassay inoculation.
Most bioassay treatment groups tested positive for PEDV within 24 to 48 hours post inoculation.

Culture Shift

This study aligns with the National Animal Disease Preparedness and Response Program mission to strengthen biosecurity infrastructure. It marks a departure from reliance on standard cleaning protocols by demonstrating that current sanitation methods may not be sufficient for virus eradication.

This news impacts North Carolina pork producers who may need to implement more stringent sanitation or quarantine measures for transport vehicles. Livestock managers should re-evaluate their current trailer cleaning procedures to better mitigate the risk of disease spread.

The takeaway

The findings suggest that current cleaning methods at commercial truck washes do not guarantee the elimination of PEDV. Producers should consider additional decontamination steps to protect their herds from potential infection.