Seroprevalence of antibodies against fHbp and NadA, two potential vaccine antigens for Neisseria meningitidis.
The IgG antibody levels directed against fHbp and NadA, two potential vaccine antigens for Neisseria meningitidis, were examined in order to investigate the extent of natural immunisation against these antigens in different age groups. As a comparison, the IgG antibody levels against Haemophilus influenzae type b were examined. In the two youngest age groups, below 10 years of age, relatively low levels of both anti-fHbp and anti-NadA were measured. A 15-fold higher geometric mean concentration of anti-fHbp was noted in the age group 20-29 years as compared to the age group 15-19 years. The peak concentration was found at 30-39 years, followed by decreased levels with age. Anti-NadA showed a certain increase up to 9 years followed by an even increase up to 40-49 years.
Jacobsson
Susanne
S
National Reference Laboratory for Pathogenic Neisseria, Department of Laboratory Medicine, Clinical Microbiology, Orebro University Hospital, SE-701 85 Orebro, Sweden. susanne.jacobsson@orebroll.se
Mölling
Paula
P
Olcén
Per
P
D018829:Adhesins, Bacterial / Q000276:immunology*; D000293:Adolescent; D000328:Adult; D000907:Antibodies, Bacterial / Q000097:blood* / Q000276:immunology; D000942:Antigens, Bacterial / Q000276:immunology*; D001426:Bacterial Proteins / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D019741:Haemophilus influenzae type b / Q000276:immunology; D006801:Humans; D007074:Immunoglobulin G / Q000276:immunology; D022401:Meningococcal Vaccines / Q000008:administration & dosage; D008875:Middle Aged; D009345:Neisseria meningitidis / Q000276:immunology*; D016036:Seroepidemiologic Studies; D013548:Sweden; D055815:Young Adult
D018829:Adhesins, Bacterial; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D007074:Immunoglobulin G; D022401:Meningococcal Vaccines; C501982:NadA protein, Neisseria meningitidis; C484699:factor H-binding protein, Neisseria meningitidis