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Related Experiment Videos

Evolving microbes and re-emerging streptococcal disease.

Richard M Krause1

  • 1Laboratory of Human Bacterial Pathogenesis, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Building 16, Room 202, 16 Center Drive, MSC 6705, Bethesda, MD 20892, USA. richard_krause@nih.gov

Clinics in Laboratory Medicine
|December 20, 2002
PubMed
Summary
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Microbial evolution drives future epidemics. Understanding microbial virulence factors and host-microbe genetics is crucial for confronting emerging infectious diseases.

Area of Science:

  • Evolutionary biology
  • Microbiology
  • Genetics

Background:

  • Microbes evolve rapidly, posing continuous threats through emerging epidemics.
  • Historical pandemics, like scarlet fever, offer insights into microbial evolution and virulence.
  • Streptococcus pyogenes (GAS) has evolved, with current strains potentially possessing historical pandemic virulence factors.

Purpose of the Study:

  • To analyze the evolutionary dynamics of microbes and their impact on epidemic patterns.
  • To investigate the potential link between historical pandemic scarlet fever and current Group A Streptococcus (GAS) strains causing Streptococcal Toxic Shock Syndrome (STSS).
  • To examine the virulence properties of GAS strains from recent outbreaks in relation to historical strains.

Main Methods:

Related Experiment Videos

  • Review of historical epidemic data, focusing on the 19th-century scarlet fever pandemic.
  • Comparative analysis of microbial genetics and virulence factors between historical and contemporary GAS strains.
  • Population genetics and evolutionary analysis of host-microbe relationships.

    • Main Results:

    • Microbes exhibit rapid evolution, outpacing human adaptation and research.
    • Contemporary GAS strains linked to Streptococcal Acute Rheumatic Fever (ARF) outbreaks display virulence traits similar to early 20th-century strains.
    • Evidence suggests current GAS strains causing STSS may share virulence factors with pandemic scarlet fever-causing GAS.

    Conclusions:

    • The continuous evolution of microbes necessitates a comprehensive, multi-faceted approach to studying infectious diseases.
    • Understanding microbial evolution and virulence is key to predicting and managing future epidemics.
    • Studying infectious diseases from all perspectives is essential for societal protection against microbial threats.