Abstract

Streptococcus prteumoniae is a major pathogen for community-acquired pneumonia,meningitis,septicemia,otitis media,and sinusitis.The licensed polysaceharide-based 23-valent pneumococcal polysaccharide vaccine and 7-valent pneumococcal polysaccharide-protein conjugate vaccine (PCV7) only elicit protective antibodies against the infection caused by serotypes that are included in the vaccines.To broaden the protection,the use of pneumococcal serotype-indepondent protein vaccines based on surface protein components will be a feasible and preferable alternative.In this review,advances in the research of pneumococcal protein vaccines are discussed. Key words: Streptococcus pneumoniae; Vaccine; Bacterial proteins

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