Abstract
Tetanus is a preventable, yet often fatal, disease affecting many species, including beef cattle. Vaccination for tetanus is recommended for calves at high risk of disease, but typical beef cattle management practices often make adherence to vaccine manufacturers’ guidance for a second (booster) dose of vaccine difficult. This study examined the antibody response following a single dose of tetanus toxoid, as well as following booster vaccination at various intervals. Anti-tetanus IgG antibodies were detectable 25 days (D25) after a single dose, and rose following booster at either D25 D109 after initial vaccination. Antibody levels then declined numerically from D109 to D179 for calves boostered at D25 but rose on D179 for those receiving a second dose on D109. The relatively rapid response in IgG production, even in the absence of a booster vaccine, may suggest value in vaccinating calves for tetanus at time of greatest risk, even if a booster cannot be administered. The study also provides support for priming of the immune response lasting at least until D109 after primary immunization.
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