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A Murine Model of Group B Streptococcus Vaginal Colonization
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Group A β-hemolytic streptococcal pharyngotonsillitis outbreak.

Dante R Culqui1, Sandra Manzanares-Laya2, Sarah Lafuente Van Der Sluis2

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An outbreak of group A Streptococcus pharyngotonsillitis occurred among healthcare professionals. Epidemiological evidence suggests potential foodborne transmission, though respiratory spread remains a possibility.

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Area of Science:

  • Infectious Disease Epidemiology
  • Bacteriology
  • Public Health

Background:

  • Group A Streptococcus (GAS) pharyngotonsillitis is a common bacterial infection.
  • Outbreaks in healthcare settings necessitate investigation into transmission routes.
  • Understanding transmission dynamics is crucial for effective control measures.

Purpose of the Study:

  • To describe an outbreak of group A β-hemolytic streptococcal pharyngotonsillitis among healthcare professionals.
  • To investigate potential transmission sources, including foodborne and respiratory routes.

Main Methods:

  • A cross-sectional descriptive study was conducted on 17 individuals who dined together.
  • Data collected included symptom frequency, timing, severity, demographics, and food history.
  • Laboratory confirmation of group A β-hemolytic streptococcal infection was performed.

Main Results:

  • The attack rate for the outbreak was 58.8%.
  • Six out of 10 clients tested positive for group A β-hemolytic Streptococcus.
  • Six of 13 food handlers developed symptoms; no food item was definitively linked.

Conclusions:

  • Epidemiological evidence supports foodborne transmission of group A β-hemolytic Streptococcus in this outbreak.
  • Respiratory transmission could not be excluded as a contributing factor.
  • Further investigation is needed to differentiate between foodborne and respiratory transmission in similar events.