Enzootic Pneumonia icon

Enzootic Pneumonia (caused by Mycoplasma hyopneumoniae)

Ileitis icon


Parasites of pigs icon

Endoparasites of Pigs

Post Weaning Diarrhoea icon

Post Weaning Diarrhoea (PWD)

Endoparasites of Pigs

Large roundworms (Ascaris suum) are the most common and economically important parasite found in pigs1. With over 70% of farms in the UK positive for Ascaris suum2, all types of pig farms are at significant risk.


Prevention and control of worms

  • Contaminated pens are the most common source of infection so adopting an ‘all-in all-out’ strategy is important for infection control.
  • Using a licensed broad spectrum anthelmintic effective against mature and immature stages of large roundworms, threadworms, red stomach worms, lung worms, whip worms and nodular worms will help reduce productivity losses.
  • For lungworm control, prevent access to earthworms.

1Stewart TB, Hoyt PG. 2006. Internal parasites. In: Straw, B.E., Zimmerman, J.J., D’Allaire, S., Taylor, D.J. (Eds.), Diseases of Swine, 9th ed. Blackwell Publishing, pp. 901–914.

2Sanchez-Vazquez MJ, Smith RP, Kang S, Lewis F, Nielen M, Gunn GJ, Edwards SA. 2010. Identification of factors influencing the occurrence of milk spot livers in slaughtered pigs: A novel approach to understanding Ascaris suum epidemiology in British farmed pigs. Vet Parasitol, 173, p 271-279.