caa a22 4500 475831926 CHVBK 20180406123842.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1007/s100960050458 doi (NATIONALLICENCE)springer-10.1007/s100960050458 Booster Effect of Low Doses of Tetanus Toxoid in Elderly Vaccinees [Elektronische Daten] [B. Björkholm, L. Hagberg, G. Sundbeck, M. Granström]  In order to improve the immunity to diphtheria, the recommended booster dose of diphtheria/tetanus vaccine for adults in Sweden was changed in 1986 from 0.5 ml of tetanus vaccine with a small diphtheria dose to 0.25 ml of a diphtheria/tetanus vaccine containing 7.5 Lf tetanus toxoid and 30 Lf diphtheria toxoid/ml. This change resulted in an increase in the dose of diphtheria toxoid from 0.5 Lf to 7.5 Lf, but a decrease in the recommended booster dose of tetanus toxoid from 3.75 Lf to 1.9 Lf. The aim of the present study was to investigate whether this lower dose of tetanus toxoid was also sufficiently protective for elderly people. Two hundred adults (median age 76 years, range 60-92 years) with no history of tetanus vaccination during the past 10 years volunteered for the study. One hundred two vaccinees were inoculated with 1.9 Lf tetanus toxoid (0.25 ml) and 98 with 3.75 Lf tetanus toxoid (0.5 ml). Paired serum samples were analysed by the toxin-binding inhibition assay. Side effects were few and mild, without significant differences between the groups. Response rates were similar, with the 3.75 Lf dose eliciting a marginally higher antitoxin response. The prevaccination geometric mean titre was the same for both groups: 0.03 IU/ml. Postvaccination geometric mean titres were 1.18 IU/ml for the 3.75 Lf group and 1.93 IU/ml for the 7.5 Lf group, respectively (difference not significant). Forty-seven percent of the vaccinees had a prevaccination titre of ≤0.01 IU/ml. Postvaccination, 85% had a titre >0.01 IU/ml. Booster vaccination with tetanus vaccine containing only 1.9 Lf of tetanus toxoid was thus found to induce an excellent immune response in elderly people, with few side effects resulting. Springer-Verlag Berlin Heidelberg, 2000 Björkholm B. Department of Infectious Diseases, Sahlgrenska University Hospital/Östra, SE 41685 Göteborg, Sweden bengt.bjorkholm@infect.gu.se, SE aut Hagberg L. Department of Infectious Diseases, Sahlgrenska University Hospital/Östra, SE 41685 Göteborg, Sweden bengt.bjorkholm@infect.gu.se, SE aut Sundbeck G. Geriatric Outpatient Clinic, Vasa Hospital, SE 41183 Göteborg, Sweden, SE aut Granström M. Department of Clinical Microbiology, Karolinska Hospital, SE 17176 Stockholm, Sweden, SE aut https://doi.org/10.1007/s100960050458 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s100960050458 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Björkholm B. Department of Infectious Diseases, Sahlgrenska University Hospital/Östra, SE 41685 Göteborg, Sweden bengt.bjorkholm@infect.gu.se, SE aut NATIONALLICENCE 700 1- Hagberg L. Department of Infectious Diseases, Sahlgrenska University Hospital/Östra, SE 41685 Göteborg, Sweden bengt.bjorkholm@infect.gu.se, SE aut NATIONALLICENCE 700 1- Sundbeck G. Geriatric Outpatient Clinic, Vasa Hospital, SE 41183 Göteborg, Sweden, SE aut NATIONALLICENCE 700 1- Granström M. Department of Clinical Microbiology, Karolinska Hospital, SE 17176 Stockholm, Sweden, SE aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer