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The feasibility of expression library immunization against the pathogenic bacterium Neisseria meningitidis was studied. A genomic library of N. meningitidis serogroup B strain CU385, containing 6000 individual clones, was constructed and divided into 10 sublibraries. Immunization of BALB/c mice with plasmid DNA from six sublibraries induced a humoral response, with recognition of several meningococcal...