Genetic Diversity and Levels of Expression of Factor H Binding Protein among Carriage Isolates of Neisseria meningitidis
|
| |
| Authors: | Ludovic Lemée Eva Hong Manuel Etienne Ala-Eddine Deghmane Valérie Delbos Aude Terrade Gilles Berthelot Francois Caron Muhamed-Kheir Taha |
| |
| Affiliation: | 1. Centre Hospitalier Universitaire, Rouen, France.; 2. Institut Pasteur, National de Reference Centre for meningococci and Invasive Bacterial infections Unit, Paris, France.; 3. Centre Hospitalier Général, Dieppe, France.; University of Kentucky College of Medicine, United States of America, |
| |
| Abstract: | The prevention of meningococcal disease may be improved by recombinant vaccines such as 4CMenB and rLP2086 that target the factor H binding protein (fHbp), an immunogenic surface component of Neisseria meningitidis present as one of three variants. Whether such vaccines decrease carriage of invasive isolates and thus induce herd immunity is unknown. We analyzed the genetic diversity and levels of expression of fHbp among 268 carriage strains and compare them to those of 467 invasive strains. fhbp gene sequencing showed higher proportions of variants 2 and 3 among carriage isolates (p<0.0001). Carriage isolates expressed lower levels of fHbp (p<0.01) but that remain high enough to predict targeting by antibodies against fHbp particularly in group B isolates belonging to the frequent hypervirulent clonal complexes in Europe and North America (cc32, cc41/44, cc269). This suggests that fHbp targeting meningococcal vaccines might reduce, at least in part, the acquisition of some hyperinvasive isolates. |
| |
| Keywords: | |
|
|
