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Familial transmission of a serious disease--producing group A streptococcus clone: case reports and review

M A Gamba1, M Martinelli, H J Schaad

  • 1Department of Medicine, Inselspital, University Hospital, Bern, Switzerland.

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
|June 1, 1997
PubMed

Insights

Person-to-person transmission of invasive group A streptococcus (GAS) is rare but can cause severe illness. This case study details a family cluster of life-threatening GAS infections, highlighting potential intrafamilial spread.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Epidemiology

Background:

  • Invasive group A streptococcus (GAS) infections are increasingly recognized as emerging public health threats.
  • While person-to-person transmission of invasive GAS is uncommon, documented cases underscore the potential for rapid disease spread within close contacts.
  • Understanding transmission dynamics is crucial for managing and preventing severe GAS infections.

Observation:

  • A previously healthy father developed severe necrotizing fasciitis of the neck.
  • Within two days, his daughter presented with streptococcal angina, pneumonia, and pleural empyema.
  • Both individuals exhibited symptoms consistent with streptococcal toxic shock syndrome.

Findings:

  • Pulsed field gel electrophoresis confirmed that the M6 strains of GAS isolated from both patients were identical.
  • This genetic identity strongly suggests a direct link and person-to-person transmission within the family.
  • The findings support the rare but significant possibility of intrafamilial spread of invasive GAS.

Implications:

  • This intrafamilial cluster highlights the potential for rapid transmission of life-threatening GAS infections among close contacts.
  • Early recognition and prompt medical intervention are critical for improving outcomes in invasive GAS cases.
  • Further research into the factors facilitating person-to-person transmission of invasive GAS is warranted.

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