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www.porknews.com.au Australian Pork Newspaper, March 2025 %u2013 Page 17MSD Animal Health Australia has launched the nation%u2019s first injectable ileitis vaccine %u2013 Porcilis Lawsonia.This vaccine addresses all three forms of ileitis, with the disease estimated to cost Australian pig producers between $4.06 and $39 per marketed pig.Pig farmers can now administer the vaccine, without relying on dosing through drinking water or the cumbersome drenching of piglets, to aid in the prevention of infections from lawsonia intracellularis, the bacterium responsible for proliferative enteropathy, commonly known as ileitis. This disease is characterised by poor growth, diarrhoea and, in severe cases, sudden death and dysentery in grower and finisher pigs.Porcilis Lawsonia offers farmers flexibility in disease control strategies, potentially leading to production cost savings in labour and feed. The vaccine can be given as an intramuscular injection mixed with Porcilis PCV M Hyo or as an intradermal needle-free vaccine in combination with Porcilis PCV IDAL. Both methods can also be used as standalone vaccines.Currently, the only alternative ileitis vaccine in Australia is administered orally through individual drenching or in water, requiring a seven-day antibiotic-free window during administration. In contrast, Porcilis Lawsonia provides a convenient single-dose option (intramuscular or intradermal) that streamlines the vaccination process, particularly when combined with existing vaccines such as Porcilis PCV M Hyo or Porcilis PCV IDAL.Farmers can start vaccinating piglets from 21 days of age with Porcilis Lawsonia, reducing clinical symptoms such as diarrhoea and weight loss caused by i intracellularis.Porcilis Lawsonia is an inactivated vaccine effective against all three recognised forms of ileitis %u2013 subclinical, chronic and haemorrhagic. Consequently, farmers can achieve labour and feed cost savings per pig marketed, even after accounting for the vaccine%u2019s initial purchase cost.Pig producers may wonder if ileitis is a concern even with antibiotic use %u2013 the answer is yes.Antibiotics often do not effectively control ileitis and increasing antimicrobial resistance has been documented. For instance, tylosin shows only intermediate effectiveness, while chlortetracycline exhibits variable results with low to intermediate activity. Poor control of ileitis can lead to decreased feed conversion ratios and average daily gains.MSD Animal Health technical lead for swine in Asia Pacific Dr Leo Ellerma said: %u201cPorcilis Lawsonia has been a trusted vaccine for ileitis since its global launch in Europe in 2018, and MSD Animal Health has a long history of innovation in the swine industry.%u201dFor more information, and research references, contact MSD Animal Health at msdanimal-health.com or 1800 033 461.Note, Porcilis is a registered trademark. MSD Animal HealthTURN AN INVISIBLE ENEMY INTO A VISIBLE PROFITPorcilis Lawsonia is the first injectable vaccine in Australia to control Ileitis.For further information, call Customer Service on 1800 033 461.%u00aeRegistered trademarks. Intervet Australian Pty Ltd (trading as MSD Animal Health). ABN: 79008467034. Copyright %u00a9 2024 Merck & Co., Inc., Rahway, NJ, USA and its affiliates. All rights reserved.PROVEN TO:REDUCE LOSS OF AVERAGE DAILY WEIGHTREDUCE MORTALITYREDUCE BACTERIAL SHEDDINGREDUCE DIARRHOEA AND INTESTINAL LESIONS.Australia%u2019s first injectable ileitis vaccine now availableLaunched by MSD Animal Health, Australia%u2019s first injectable ileitis vaccine Porcilis Lawsonia addresses all three forms of ileitis.