Neisseria lactamica Protects against Experimental Meningococcal Infection

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Neisseria lactamica protects against experimental meningococcal infection.

Immunological and epidemiological evidence suggests that the development of natural immunity to meningococcal disease results from colonization of the nasopharynx by commensal Neisseria spp., particularly with N. lactamica. We report here that immunization with N. lactamica killed whole cells, outer membrane vesicles, or outer membrane protein (OMP) pools and protected mice against lethal chall...

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Recombinant Neisseria meningitidis transferrin binding protein A protects against experimental meningococcal infection.

To better characterize the vaccine potential of Neisseria meningitidis transferrin binding proteins (Tbps), we have overexpressed TbpA and TbpB from Neisseria meningitidis isolate K454 in Escherichia coli. The ability to bind human transferrin was retained by both recombinant proteins, enabling purification by affinity chromotography. The recombinant Tbps were evaluated individually and in comb...

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Anthrax capsule vaccine protects against experimental infection.

Efficacy of a poly-gamma-D-glutamic acid anthrax capsule vaccine was assessed in a mouse model of infection. Capsule by itself was protective against lethal challenge with a toxin(-), capsule(+) Bacillus anthracis strain. Conjugation of capsule to bovine serum albumin resulted in enhanced IgG anti-capsule antibodies measured by ELISA, but completely abrogated the protection. The protective unco...

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Variation in the Neisseria lactamica porin, and its relationship to meningococcal PorB

One potential vaccine strategy in the fight against meningococcal disease involves the exploitation of outer-membrane components of Neisseria lactamica, a commensal bacterium closely related to the meningococcus, Neisseria meningitidis. Although N. lactamica shares many surface structures with the meningococcus, little is known about the antigenic diversity of this commensal bacterium or the an...

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Nasopharyngeal colonization by Neisseria lactamica and induction of protective immunity against Neisseria meningitidis.

BACKGROUND Natural immunity to Neisseria meningitidis may result from nasopharyngeal carriage of closely related commensals, such as Neisseria lactamica. METHODS We enrolled 61 students with no current carriage of Neisseria species and inoculated them intranasally with 10,000 colony-forming units of Neisseria lactamica or sham control. Colonization was monitored in oropharyngeal samples over ...

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ژورنال

عنوان ژورنال: Infection and Immunity

سال: 2002

ISSN: 0019-9567,1098-5522

DOI: 10.1128/iai.70.7.3621-3626.2002