Rispoval IBR-Marker Live

Indications for use, specifying the target species

For active immunisation of cattle against Infectious Bovine Rhinotracheitis (IBR), to reduce virus shedding and clinical signs including, in female cattle, abortions associated with BoHV-1 infection. A reduction of abortion associated with BoHV-1 infections has been demonstrated during the second trimester of gestation upon challenge 28 days after vaccination. Vaccinated cattle can be differentiated from field virus infected animals due to the marker deletion, unless the cattle were previously vaccinated with a conventional vaccine or infected with field virus.

Onset of immunity: 7 days following a single intranasal administration.

21 days following a single intramuscular administration.
Duration of immunity following vaccination before 3 months of age: after intranasal vaccination of calves aged 2 weeks or older without maternally derived antibodies, immunity lasts until at least 3 months of age, when the animals should be revaccinated via intramuscular injection.

A proportion of young calves may have maternally derived antibodies to BoHV-1, which may affect the immune response to vaccination. Consequently, the protection afforded by the vaccine may not be complete until the revaccination at 3 months of age. Duration of immunity following vaccination at or after 3 months of age: 6 months.