Handling of Bovine Vaccine

Why not vaccinate 8 months old heifers against Brucellosis?

The heifers vaccinated against Brucellosis with the B19 strain produce a high quantity of antibodies for their protection. However, infected animals also produce these same antibodies. Indirect diagnostic tests are able to measure antibodies from both vaccinations and infections.

This resulted in the vaccination of heifers aged between 3 and 8 months to generate protection against the disease. There is a high possibility of the animal presenting positive result to brucellosis if vaccinated after 8 months, and this result may be a false positive (antibodies from the vaccination) or true positive (antibodies from the infection).

How to use the clostridial vaccines in bovines?

Vaccination against clostridioses aims to keep the animals in good immunological condition in order to protect them when they come in contact with the agents that cause these diseases.
The clostridioses can affect animals of any gender and of any age, however, younger animals are more susceptible because their immune system is not fully developed.

A characteristic of the bovine is the very low passage of antibodies through the placenta, which means that the animals are born without any protection. The colostrum is the first source of antibodies for calves. The defense acquired through this route is called passive immunity. This means that the animal acquired the ready-made antibodies. Newborn ruminants no immune system, and they are only able to produce their own defense when they are 15 days old.

This way, two manners can be adopted to protect the young animals. The first is by vaccinating the mother before delivery, which will produce a high quantity of antibodies and transmit it through the colostrum to the newborns. When this procedure is performed, it is recommended to start vaccination of the young animals when they are 60 days old and reinforce 30 days after the first dose. In animals born from mothers that were not vaccinated during the pre-delivery period, a first dose is necessary at 15 days and reinforcement 30 days after.

After the initial vaccination, the animals may have a good defense capacity, but will only reach full capacity after completing two years of age. Therefore, a good measure is to vaccinate the animals every six months until they complete two years. The next phase is to handle the adult animals that, by receiving an annual dose, will be protected against the clostridial diseases.

Remembering that there are other ways of conducting a vaccinal program against the clostridioses. The best way is the specific instruction from a Veterinary Doctor for each case.

Biovet Vaccines

How should the Biovet vaccines be stored?

The vaccines should be stored at temperatures between 2ºC and 8ºC. In the case of any change in the temperature of the container where the vaccines are stored, contact Biovet Customer Service: 0800-556642 or