NDLI: Protection of Mice against Brucellosis by Intranasal Immunization with Brucella melitensis Lipopolysaccharide as a Noncovalent Complex with Neisseria meningitidis Group B Outer Membrane Protein

Content Provider	PubMed Central
Author	Bhattacharjee, Apurba K. Van, De Verg Lillian Izadjoo, Mina J. Yuan, Liang Hadfield, Ted L. Zollinger, Wendell D. Hoover, David L.
Copyright Year	2002
Abstract	Intranasal immunization of mice with purified Brucella melitensis lipopolysaccharide (LPS) as a noncovalent complex with Neisseria meningitidis group B outer membrane protein (GBOMP) elicited a high-titer anti-LPS systemic antibody response and a significant mucosal antibody response. The anti-LPS immunoglobulin G (IgG) antibody was predominantly of the IgG1 subtype, although there was some response of the IgG2a, IgG2b, and IgG3 subtypes. The antibody titer remained high for 16 weeks postimmunization. Immunized mice and sham-immunized control mice were challenged intranasally with 104 CFU of virulent B. melitensis strain 16 M 4 weeks after the second dose of vaccine. The numbers of bacteria in lungs, livers, and spleens at 3 days, 9 days, and 8 weeks postchallenge were determined. Bacteria were found in lungs of all mice on day 3, but there was no disseminated infection of liver or spleen. By day 9, 40% of the mice had infected spleens and livers. At 8 weeks postchallenge, spleens of 25 of 62 immunized mice were infected, compared to 61 of 62 control mice (P < 0.0001). The livers of 12 of 43 immunized mice were infected, compared to 22 of 36 control mice (P = 0.005). In contrast, the lungs of 26 of 46 immunized mice were still infected, compared to 27 of 44 control mice. The numbers of bacterial CFU in lungs of immunized and control animals were identical. These studies show that intranasal immunization with B. melitensis LPS-GBOMP subunit vaccine significantly protects mice against intranasal challenge with virulent B. melitensis. Vaccination reduces bacterial dissemination to spleen and liver but has no effect on the course of lung infection.
Related Links	http://dx.doi.org/10.1128/iai.70.7.3324-3329.2002
Ending Page	3329
Page Count	6
Starting Page	3324
File Format	PDF
ISSN	00199567
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	7
Volume Number	70
Language	English
Publisher	American Society for Microbiology
Publisher Date	2002-07-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Immunology Microbiology Parasitology Infectious Diseases Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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