Abstract
In order to assess immunity to diphtheria in Izmir, Turkey, a total of 743 persons 1–70 years of age were selected with cluster sampling. The information on socio-demographic characteristics, vaccination status and diphtheria history was gathered for each participant. Diphtheria antitoxin levels were measured qualitatively by using micro-enzyme immune assay. Of studied population, 79.1% had fully protective antitoxin levels (≥ 0.1 IU/ml). Diphtheria protection rates showed a gradual age-related decrease, reaching minimum in the 30–44 age group, in which 40.2% of these subjects had antibody titre below the full protective level. The diphtheria antitoxin geometric mean titer was highest in the 5–9 year age group (1.05 IU/ml). Then, geometric mean titer decreased with increasing age, and reached the minimum level in the 30–44 age group (0.19 IU/ml). These results suggest that in Izmir, Turkey, full serological protection against diphtheria is only detectable in 60% of the adult population. The enhancement of diphtheria immunity by booster vaccinations in adolescents and adults should be considered in Turkey.
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Egemen, A., Kurugöl, Z., Akşit, S. et al. Immunity to diphtheria in Izmir, Turkey. Eur J Epidemiol 16, 1039–1042 (2000). https://doi.org/10.1023/A:1010853026812
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DOI: https://doi.org/10.1023/A:1010853026812