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  • Title: Antibodies to filamentous hemagglutinin of Bordetella pertussis and protection against whooping cough in schoolchildren.
    Author: He Q, Viljanen MK, Olander RM, Bogaerts H, De Grave D, Ruuskanen O, Mertsola J.
    Journal: J Infect Dis; 1994 Sep; 170(3):705-8. PubMed ID: 8077734.
    Abstract:
    A pertussis outbreak was studied prospectively in an elementary school with 39 pupils. All had been immunized with at least three doses of Finnish diphtheria-tetanus toxoid-pertussis vaccine. Diagnosis of pertussis was based on culture, polymerase chain reaction results, and EIA serology using filamentous hemagglutinin (FHA), pertussis toxin, and 69-kDa outer membrane protein as antigens. At the first sampling, 21 children had symptoms suggestive of pertussis, and 18 were healthy. Of the latter, 8 remained healthy without any antibiotic treatment and 9 developed clinical pertussis 1-22 days later. One child developed cough later, but this symptom did not meet criteria for pertussis. The mean levels of IgG, IgM, and IgA antibodies to FHA were significantly higher in 8 healthy children than in 9 children who developed pertussis after the first sampling (P < .001, P = .027, and P = .011, respectively). The results show that antibodies to FHA of Bordetella pertussis in immunized schoolchildren correlate with protection against pertussis.
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