Porcilis PRRS, a field-proven, modified-live vaccine for immunizing pigs against the porcine reproductive and respiratory syndrome virus, will be introduced by MSD Animal Health in Malaysia, the Philippines, Thailand and Vietnam.

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The vaccine, successfully used throughout Europe for over a decade, should help pig producers to control PRRS. In finishing pigs vaccinated with Porcilis PRRS, field trials have demonstrated significant improvement in performance, including reduced morbidity due to PRRS and improved daily growth and feed conversion, according to MSD Animal Health. In breeding pigs, use of the vaccine has resulted in significant improvement in reproductive performance on farms contaminated with the PRRS virus and it reduces transmission of the virus to piglets via the placenta. The duration of immunity with Porcilis PRRS is at least 24 weeks.