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Siderochrome production by Yersinia pestis and its relation to virulence
Infection and Immunity
|November 1, 1975
Abstract:
P+ plague strains contained more siderochrome-producing organisms than P-. Siderochrome enhanced the mouse virulence of an F1+Vw+P1+P-Pu+ strains, inhibited P1 activity, and could be assayed by a paper disk titration method.
Insights
Plague strains producing siderochrome were more virulent in mice. Siderochrome enhanced virulence, inhibited P1 activity, and could be measured using paper disk titration.
Area of Science:
- Microbiology
- Pathogen Biology
- Infectious Diseases
Background:
- Plague is a serious infectious disease caused by the bacterium Yersinia pestis.
- Virulence factors play a critical role in the pathogenicity of Y. pestis.
- Siderochromes are iron-chelating compounds that can influence bacterial growth and virulence.
Purpose of the Study:
- To investigate the role of siderochrome production in plague virulence.
- To determine the effect of siderochrome on Y. pestis strains with different virulence factors.
- To establish a method for assaying siderochrome activity.
Main Methods:
- Comparison of siderochrome-producing organisms in P+ and P- plague strains.
- Assessment of siderochrome's impact on mouse virulence using a specific Y. pestis strain (F1+Vw+P1+P-Pu+).
- Evaluation of siderochrome's effect on P1 enzyme activity.
- Development and application of a paper disk titration method for siderochrome assay.
Main Results:
- Plague strains designated as P+ exhibited a higher prevalence of siderochrome-producing organisms compared to P- strains.
- Siderochrome administration significantly enhanced the virulence of an F1+Vw+P1+P-Pu+ Y. pestis strain in a mouse model.
- Siderochrome demonstrated inhibitory effects on P1 enzyme activity.
- A reliable paper disk titration method was successfully employed to assay siderochrome levels.
Conclusions:
- Siderochrome production is associated with increased virulence in plague.
- Siderochrome contributes to Y. pestis pathogenicity by enhancing virulence and potentially modulating enzyme activity.
- Paper disk titration serves as a viable method for quantifying siderochrome in plague studies.
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