Feedstuffs is part of the Informa Markets Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Merck introduces injectable ileitis vaccine

Provides 20 weeks duration of immunity for control of ileitis caused by Lawsonia.

Merck Animal Health has introduced PORCILIS ILEITIS, the first injectable vaccine that offers a 20-week duration of immunity (DOI) for control of ileitis caused by Lawsonia intracellularis.

Ileitis can significantly impact the health and performance of finishing pigs; curbing average daily gain by 38% and feed efficiency by 27%, the announcement said.

Given as a single, intramuscular vaccination to pigs as young as three weeks of age, PORCILIS ILEITIS provides longer protection — 13 additional weeks — compared to water-administered vaccines on the market. It helps pigs maintain optimal health and efficient production performance until market. PORCILIS ILEITIS controls the disease, reduces colonization of L. intracellularis and reduces duration and concentration of fecal shedding, Merck said. Results of a challenge study show that PORCILIS ILEITIS also was able to induce L. intracellularis antibody titers and control both gross and microscopic lesions.

Merck Animal Health’s proprietary MICROSOL DILUVAC FORTE adjuvant system, designed specifically for pigs, plays a key role in the vaccine’s efficacy. The adjuvant, also used in CIRCUMVENT G2, has an track record of creating longer and stronger immunity, which means when there’s an actual real-world exposure, a pig’s immune system will respond rapidly, Merck said.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.