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  • Title: A randomized comparison between early and late vaccination with tetanus toxoid vaccine after allogeneic BMT.
    Author: Parkkali T, Olander RM, Ruutu T, Vuontela K, Volin L, Eskola J, Ruutu P.
    Journal: Bone Marrow Transplant; 1997 May; 19(9):933-8. PubMed ID: 9156269.
    Abstract:
    Forty-five adult HLA-matched sibling BMT recipients were randomized to receive tetanus toxoid (TT) vaccine at 6, 8 and 14 months (early group, n = 23) or at 18, 20 and 26 months after BMT (late group, n = 22). At 6 months after BMT, prior to the first vaccination, 90% of the early group patients had a protective tetanus antibody concentration of > or = 0.1 HU/ml (passive haemagglutination test) but only 70% of the late group patients did so at 18 months after BMT. The antibody responses 1 month after each of the three TT vaccine doses were similar in the two vaccination groups, except that after the first dose, four-fold responses occurred more frequently in the late group. All vaccinated patients achieved the protective antibody concentration of > or = 0.1 HU/ml. In the late group the recipient antibody responses after the first and second vaccine doses correlated with the donor anti-TT level. A tetanus vaccination schedule consisting of three vaccine doses is equally immunogenic when started at 6 or 18 months after BMT. Donor immunity against tetanus may influence recipient responses to TT vaccination.
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