Zoetis has announced the EU launch of Suvaxyn PRRS MLV, a novel vaccine containing a modified live European Porcine Reproductive and Respiratory Syndrome (PRRS) virus strain, grown in a unique cell line for whole herd protection against PRRS.

Suvaxyn PRRS MLV offers the earliest piglet vaccination from the first day of age, securing immunity before the risk period which lasts until the end of the fattening. Pig protection is established 28 days after vaccination, and lasts for 26 weeks after vaccination in fattening pigs, and 16 weeks after vaccination in gilts and sows. Zoetis says the vaccine reduces viremia and nasal shedding of the virus.

Monica Balasch, Associate Director, Global Biologicals Development at Zoetis said: "In Europe, Porcine Reproductive and Respiratory Syndrome is known for severe impacts on reproduction including lowering birth rates, increasing abortion, stillbirth, mummified, as well as weak live-born piglets, and death.

"In clinical studies conducted with Suvaxyn PRRS MLV, we found excellent results vaccinating pigs from the first day of age. It is safe to be used as the earliest protection in piglets, and to protect the whole herd against PRRS, as it is also safe for use in gilts and sows.

"The new vaccine represents a flexible alternative to allow for new customized PRRS control programs developed by veterinarians for producers."

Alvaro Aldaz, Director, Commercial Development and Innovation, Swine, at Zoetis said: "We are excited to bring this innovative vaccine to Europe. Suvaxyn PRRS MLV has been developed using a very innovative vaccine technology which brings swine veterinarians a new advanced PRRS control tool.

"As well reducing viremia, nasal shedding and lung lesions in fattening pigs, the vaccine has been proven to overcome maternal immunity, which increases the efficacy of the vaccine when given to piglets during the first days of life. Additionally, it allows veterinarians for use PRRS mass vaccination within the claim; mass vaccination has become more and more popular in several European countries."

Suvaxyn PRRS MLV is a veterinary vaccine that contains a European PRRS virus strain (Genotype 1) that has been grown and attenuated in a uniquely modified cell line developed by Zoetis. 

Jay Calvert, Research Director, VMRD Global Biologicals Research at Zoetis said: "Suvaxyn PRRS MLV is safe based on true loss of virulence, and not based on a temporary reduction in ability to replicate in macrophage cells in the lung of the pig."

Zoetis says the efficacy of Suvaxyn PRRS MLV is supported by a comprehensive program of clinical studies reviewed by the European Medicines Agency and included in the regulatory procedure approved by the European Commission in August 2017.

The European public assessment report is available at: http://www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Summary_for_the_public/veterinary/004276/WC500235212.pdf 

The company says the most common side effects with Suvaxyn PRRS MLV (which may affect more than one in 10 pigs) are a short-lived increase in body temperature (0.5°C on average and up to 1.4°C individually) within four days of vaccination, and in sows local reactions in the form of swellings which resolve without treatment within five to 32 days.