Affiliation:
1. Division of Science and Design, Gadi Research Centre, University of Canberra, Canberra, Australia
2. Department of Pediatrics, Division of Molecular Medicine, The Ohio State University College of Medicine and Public Health, Columbus, Ohio
Abstract
ABSTRACT
The rat middle ear and lung clearance model has been used to show that the nontypeable
Haemophilus influenzae
26-kDa outer membrane protein OMP26 is highly efficacious as a mucosal immunogen, inducing significantly enhanced clearance in immunized rats upon direct challenge of these two anatomic sites. Similarly, the chinchilla model of middle ear and nasopharyngeal clearance has been used to show that two P5 fimbrin adhesin-derived immunogens, LB1 and lipoprotein D (LPD)-LB1(f)
2,1,3
, are highly efficacious as parenteral immunogens. Both induced significantly augmented clearance of nontypeable
H. influenzae
upon challenge of these sites. Here, these three nontypeable
H. influenzae
immunogens in addition to six bovine serum albumin and keyhole limpet hemocyanin conjugates of the synthetic peptide LB1(f) were assayed for relative efficacy in the reciprocal rodent model system. OMP26 was assayed in the chinchilla host by a parenteral immunization route, with clearance of the middle ear and nasopharynx used as outcome measures. Both LB1 and LPD-LB1(f)
2,1,3
were assayed in the rat host with a mucosal immunization route and clearance of nontypeable
H. influenzae
from the lungs and middle ears as outcome measures. Both of the immunogens were found to induce a high-titered and specific immune responses in the heterologous host system. Moreover, each was found to be highly efficacious in the reciprocal host system, providing strong support for the continued development and inclusion of both OMP26 and P5 fimbrin-derived peptides as candidate vaccine antigens directed at otitis media caused by nontypeable
H. influenzae
.
Publisher
American Society for Microbiology
Subject
Infectious Diseases,Immunology,Microbiology,Parasitology
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