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J Clin Microbiol. 1989 July; 27(7): 1567-1571

Subclass compositions of immunoglobulin G to pertussis toxin in patients with whooping cough, in healthy individuals, and in recipients of a pertussis toxoid vaccine.

Department of Clinical Bacteriology, University of Göteborg, Sweden.

ABSTRACT

The subclass composition of serum immunoglobulin G (IgG) antibodies against pertussis toxin was studied in 108 serum samples obtained during various stages of disease from 75 patients with whooping cough. IgG1 and IgG3 antibodies were detected in 92 and 42% of the samples, respectively, while only a few contained IgG2 or IgG4 antibodies. Similarly, IgG1 antibodies were predominant in serum samples from healthy children and adults, many of whom had a history of whooping cough several years earlier. Of 85 children and 30 adults with detectable levels of total IgG, 65 and 14 had IgG1 antibodies, respectively, while only 9 of them had IgG3 antibodies. Again, very few sera contained IgG2 or IgG4 antibodies. In contrast, 13 children vaccinated with an acellular aluminum-adsorbed pertussis toxoid vaccine responded mainly with IgG1 and IgG4 antibodies. In conclusion, this study showed that the subclass composition of IgG antibodies to pertussis toxin after natural infection consists mainly of IgG1 and to a certain extent of IgG3, while an aluminum-adsorbed pertussis toxoid induces IgG1 and IgG4 antibodies.