Vaccinating cattle for blackleg generally involves an initial series to establish immunity, followed by regular annual booster shots to maintain protection against this serious disease.
Initial Vaccination Protocol
For most blackleg vaccines, a two-shot series is recommended to build foundational immunity. This initial series typically follows a specific schedule:
- First Dose: Administer the initial dose to calves at the appropriate age, often when they are a few months old.
- Second Dose (Booster): A second dose is usually given 3 to 4 weeks after the first dose. This second shot is crucial for ensuring a robust and lasting immune response.
Special Considerations for Specific Vaccines
While the two-dose series is common, there are exceptions. For instance, one product, Alpha 7 (Boehringer Ingelheim), requires only a single dose for effective protection in certain circumstances. However, if calves are vaccinated with Alpha 7 when they are under 3 months of age, a re-vaccination is necessary. This subsequent dose should be administered at weaning or when the calves reach 4 to 6 months of age to ensure they develop full and protective immunity.
Annual Booster Vaccinations
Regardless of the specific vaccine product used for the initial series, all blackleg vaccines universally recommend an annual booster vaccination. This yearly booster is vital for maintaining high levels of immunity in cattle throughout their lives, providing continuous protection against blackleg disease.
Summary of Vaccination Schedule
The following table summarizes the general guidelines for blackleg vaccination:
| Vaccination Type | Schedule |
|---|---|
| Initial Series | Most Vaccines: Two doses administered 3-4 weeks apart. Alpha 7 (Boehringer Ingelheim): Single dose for calves vaccinated over 3 months of age. If vaccinated under 3 months of age, re-vaccinate at weaning or 4-6 months of age. |
| Maintenance Boosters | All Blackleg Vaccines: Annual booster recommended for continuous protection. |
Adhering to these vaccination schedules is critical for preventing blackleg, a rapidly fatal disease in cattle, and maintaining herd health.
