Vira Shield®
Dairy Cattle Vaccine

CONTROL WITHOUT COMPLICATION

Vira Shield 6 has none of the restrictions that a live vaccine must carry.

In 2006, South Dakota State University reported an increase in the number of cases of IBR-caused abortions associated with improper use of modified live IBR-BVD vaccines.1

A new study shows Vira Shield can provide enhanced IBR fetal protection 8 months post-vaccination without the risks that may be associated with modified live IBR vaccines.2

• Scientific evidence suggests that MLV-IBR vaccines should not be administered during estrus in seronegative (i.e., unexposed) females.3

• Vira Shield 6 was given according to label to 21 heifers pre-breeding; 14 control heifers were not vaccinated.

• Animals were challenged with virulent IBR at approximately 6 months of gestation and almost 8 months post-vaccination.

• 18 of 21 heifers that received Vira Shield 6 were protected from abortion following challenge; all 14 control heifers aborted (see figure). IBR was isolated from all aborted fetuses and no other pathogens were detected.

1. Daly R. Timing of vaccination in beef cattle herd. Proceedings, Applied Reproductive Strategies in Beef Cattle. 2006. Rapid City, South Dakota.
2. Zimmerman A, et al. Efficacy of bovine herpesvirus-1 inactived vaccine against abortion and stillbirth in pregnant heifers. JAVMA. 2007:231:1386-1389.
3. Chiang B., et al. The effect of infectious bovine rhinotracheitis vaccine on reproductive efficiency in cattle vaccinated during estrus. Theriogenology. 1990;33:1113-1120.