Porcine proliferative enteropathy, also known as ileitis, is a pig disease widely spread in the world. Ileitis is caused by the bacteria Lawsonia intracellularis, developing inside intestinal epithelial cells. Affected pig develop either an acute form of the disease (causing diarrhea, anemia and sudden death) or a chronic form responsible for decrease feed intake and diarrhea. The prevalence of the disease is very high: reports mention that in some countries 75% or more of the herds are infected with Lawsonia intracellularis. Reduced weight gain, longer growth time and increased mortality, together with the extensive spread of the disease result in very high costs for the pig industry. The bacteria are transmitted from pig to pig via infected faeces. It has been reported that Lawsonia intracellularis may be viable outside the host (pig) for up to 2 weeks under conditions similar to those found on pig farms. Halamid® efficacy against Lawsonia intracellularis has been assessed by Dr. McOrist, one of the world recognized expert on ileitis and Lawsonia. A 0.3% Halamid® solution with a contact time of 30 minutes proved to be very effective in killing the bacteria. Because of the bacteria survival for up to 2 weeks in a pig farm environment, it is necessary to adopt a strict hygiene program to avoid contamination as much as possible.