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[The pathogenicity factors of Streptococcus pneumoniae strains causing meningitis]

N N Kostiukova, M O Volkova, A S Kvetnaia

    Zhurnal Mikrobiologii, Epidemiologii I Immunobiologii
    |May 1, 1996
    PubMed

    Insights

    Pneumococcal meningitis in children was studied in St. Petersburg. Key factors for developing severe infection include pneumococcal capsules, pneumolysin, and hyaluronidase activity.

    Area of Science:

    • Microbiology
    • Epidemiology
    • Pediatrics

    Background:

    • Pneumococcal meningitis poses a significant threat to children's health.
    • Epidemiological data from St. Petersburg (1985-1991) indicated notable morbidity rates.

    Purpose of the Study:

    • To identify key virulence factors of Streptococcus pneumoniae strains causing meningitis.
    • To understand factors contributing to the development of generalized pneumococcal infections in children.

    Main Methods:

    • Comparative analysis of isolated pneumococcal strains from meningitis cases.
    • Assessment of bacterial capsules, pneumolysin, and hyaluronidase activity.
    • Serovar typing of pneumococcal isolates.

    Main Results:

    • Morbidity rates ranged from 1.7-2.3 per 100,000 children, with higher rates (7.4-19.8) in infants under one year.
    • Serovars 19, 1, 6, 15, and 2 were predominant in meningitis cases.
    • Presence of capsules, pneumolysin, and high hyaluronidase activity were strongly associated with generalized infection.

    Conclusions:

    • Bacterial capsules, pneumolysin, and hyaluronidase activity are critical virulence factors in pneumococcal meningitis.
    • Specific serovars (1 and 2) contribute to disease severity, independent of hyaluronidase levels.
    • Further research is needed to clarify the role of mouse virulence in human infection.

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