Rodents in the Shadows: Uncovering the Hidden Threat to Pig Farms

Pig farms in Belgium are facing a sneaky threat. Rodents, often seen as pests, are quietly spreading a highly prevalent intestinal parasite called Ascaris suum. This parasite is a major problem worldwide, but its spread by rodents on pig farms has gone largely unexplored.

Researchers set out to investigate whether two common rodent species, Mus musculus and Rattus norvegicus, can carry and spread A. suum eggs between different areas of the farm. They trapped rodents on two pig farms and analyzed their fecal samples for the presence of A. suum eggs. The results showed that 4.17% of M. musculus and 17.14% of R. norvegicus had A. suum eggs in their feces.

Further testing confirmed that pigs on both farms had been exposed to A. suum before. Although the prevalence of eggs was low, the findings suggest that rodents could be acting as mechanical vectors, spreading A. suum eggs between stables and leading to persistent environmental contamination.

This highlights the need for pig farm owners to include rodent control in their broader biosafety strategies. By reducing the risk of reintroducing eggs into cleaned and disinfected stables, they can limit the spread of A. suum and keep their farms safer.