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[Shigella flexneri strains having a new type antigen].

S Matsushita1, S Yamada, Y Kudoh

  • 1Department of Microbiology, Tokyo Metropolitan Research Laboratory of Public Health.

Kansenshogaku Zasshi. the Journal of the Japanese Association for Infectious Diseases
|April 1, 1992
PubMed
Summary

Five Shigella strains from Tokyo exhibited an atypical serotype, suggesting a new Shigella flexneri antigen. These pathogenic bacteria were identified through biochemical and virulence tests.

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Area of Science:

  • Microbiology
  • Bacteriology
  • Immunology

Context:

  • Dysentery outbreaks in Tokyo (1986-1989) involved five Shigella strains.
  • These strains presented atypical serotypes, reacting only with S. flexneri group 6 factor antigen antiserum.

Purpose:

  • To characterize the serological and biochemical properties of these atypical Shigella strains.
  • To determine if these strains represent a new serotype within Shigella flexneri.

Summary:

  • Five Shigella strains from dysentery cases showed typical S. flexneri biochemical reactions and virulence markers.
  • Serological analysis revealed cross-reactivity with S. flexneri 1b and 4b, but absorption tests confirmed a novel O antigen.
  • Strain 88-893 was designated as the reference strain for this newly identified S. flexneri type antigen.

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Impact:

  • Identifies a new Shigella flexneri serotype, crucial for accurate diagnostics and epidemiological tracking.
  • Enhances understanding of Shigella diversity and evolution.
  • Provides a reference strain for future research on this specific antigen and its implications in dysentery.