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Immunization against nosocomial infection

A I Braude, E J Ziegler, J A McCutchan

    The American Journal of Medicine
    |February 1, 1981
    PubMed
    Summary
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    A novel vaccine targeting gram-negative bacteria

    Area of Science:

    • Immunology
    • Microbiology
    • Infectious Diseases

    Background:

    • Gram-negative bacteremia is a severe nosocomial infection in immunocompromised patients.
    • Gram-negative bacteria share a common core lipopolysaccharide (LPS).

    Purpose of the Study:

    • To develop a single vaccine or antiserum effective against various gram-negative bacterial species.
    • To investigate the protective potential of a vaccine derived from a mutant Escherichia coli 0111 (J5) strain.

    Main Methods:

    • Utilized a mutant Escherichia coli 0111 (J5) deficient in UDP-galactose epimerase to expose core LPS.
    • Administered J5 vaccine and antiserum to immunosuppressed animals challenged with gram-negative bacteria.
    • Conducted a double-blind clinical trial using J5 antiserum in patients with gram-negative bacteremia.

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    Main Results:

    • J5 vaccine induced broad protection against lethal gram-negative infections in animals.
    • J5 antiserum significantly improved survival rates in animals with bacteremia.
    • In a clinical trial, J5 antiserum halved the mortality rate and increased survival from shock.
    • Protection was sustained even when animals were challenged six weeks post-immunization.

    Conclusions:

    • A vaccine or antiserum targeting the common core LPS of gram-negative bacteria shows significant promise.
    • J5 vaccine and antiserum offer broad-spectrum protection against gram-negative infections.
    • Further clinical trials are warranted to confirm the efficacy of J5 antiserum in patients.