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Related Experiment Videos

A serologic response in human infection with Enterobacteriaceae.

J C Crowder, J P Rissing, J W Smith

    The American Journal of the Medical Sciences
    |March 1, 1977
    PubMed
    Summary

    Precipitin antibodies were detected in patients with Escherichia coli and other enterobacterial infections. Antibody levels increased significantly by the third week post-infection, indicating a robust immune response.

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    Area of Science:

    • Medical Microbiology
    • Immunology
    • Infectious Diseases

    Background:

    • Enterobacterial infections caused by Escherichia coli, Proteus, Klebsiella, and Serratia are significant health concerns.
    • Understanding the host immune response, particularly antibody production, is crucial for diagnosing and managing these infections.

    Purpose of the Study:

    • To investigate the presence and dynamics of precipitins against ultrasonic extracts of common enterobacteria in patient sera.
    • To assess the diagnostic potential of detecting these precipitins during the course of infection.

    Main Methods:

    • Gel diffusion assays were employed to detect precipitins in sera from patients with enterobacterial infections.
    • Sera were collected at various time points after infection onset and tested against homologous and heterologous bacterial antigens.

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    Main Results:

    • Precipitins were found in 66% of initially tested patient sera.
    • The detection rate of precipitins increased from 24% in the first week to 78% by the third week post-infection.
    • Cross-reactivity with other enterobacterial antigens was common, though homologous antigen titers were typically higher. A common enterobacterial antigen was recognized in seven patients.

    Conclusions:

    • Precipitin detection is a valuable tool for diagnosing enterobacterial infections, with sensitivity increasing over time.
    • The immune response involves antibodies that can cross-react with related enterobacterial antigens.
    • Further research into specific antigen-antibody interactions could refine diagnostic strategies.