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A new attenuated IBR live vaccine with double genetic deletion gE-tk- is efficacious in front of experimental BoHV-1 infections, even in presence of maternally derived antibodies

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Moreno, A.; Casado, C.; Roca, M.; Creixans, O.

The attenuated MLV IBR vaccine with a double genetic deletion gE-tk- (HIPRABOVIS® IBR Marker Live, HIPRA) proved to be effective, fulfilling the requirements of the monograph of the European Pharmacopeia for live vaccines against IBR.

IBR (Infectious Bovine Rhinotracheitis) eradication programs in the EU are based mainly on a DIVA (Differentiation of Infected from Vaccinated Animals) strategy by using marker vaccines. So far, all these IBR marker vaccines were based on single deleted BoHV-1 gE- strains: Bovine HerpesVirus-1 strains lacking glycoprotein E.

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