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Rev. bras. pesqui. méd. biol ; Braz. j. med. biol. res;43(1): 120-123, Jan. 2010. tab, ilus
Article in English | LILACS | ID: lil-535648

ABSTRACT

Serologic data on diseases that are preventable by vaccines are necessary to evaluate the success of immunization programs and to identify susceptible subgroups. In the present study, we determined serum IgG levels against diphtheria toxin of military and civilian blood donors (N = 75; 69.3 percent males and 30.7 percent females) aged 18-64 years, from the Brazilian Army Biology Institute, Rio de Janeiro, using a commercial diphtheria kit (Diphtheria IgG ELISA; IBL, Germany). Most (63 percent) unprotected military donors were from the older age group of 41 to 64 years. In contrast, the majority (71 percent) of young military donors (18 to 30 years) were fully protected. About half of the military donors aged 31 to 40 years were protected against diphtheria. Among the civilians, about 50 percent of persons aged 18 to 30 years and 31 to 40 years had protective antibody levels against diphtheria as also did 64 percent of individuals aged 41 to 64 years. All civilians had a similar antibody response (geometric mean = 0.55 IU/mL) independent of age group. Military donors aged 18-30 years had higher IgG levels (geometric mean = 0.82 IU/mL) than military donors of 41-64 years (geometric mean = 0.51 IU/mL; P > 0.05). In conclusion, the existence of a considerable proportion of susceptible adults supports the position that reliable data on the immune status of the population should be maintained routinely and emphasizes the importance of adequate immunization during adulthood.


Subject(s)
Adolescent , Adult , Female , Humans , Male , Middle Aged , Young Adult , Antibodies, Bacterial/blood , Corynebacterium diphtheriae/immunology , Diphtheria Toxin/blood , Diphtheria/immunology , Immunoglobulin G/blood , Military Personnel , Age Distribution , Blood Donors , Brazil/epidemiology , Diphtheria/epidemiology , Enzyme-Linked Immunosorbent Assay , Young Adult
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