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[Tuberculosis outbreak at a public school]

J F Navarro Gracia1, M Peña Fernández, I García Abad

  • 1Unidad de Medicina Preventiva y Salud Pública, Hospital de Elche, Alicante.

Revista Clinica Espanola
|March 1, 1997
PubMed
Summary

A school tuberculosis outbreak was investigated, revealing higher infection rates in classrooms with more teacher contact. Targeted chemoprophylaxis and contact tracing were crucial for controlling the microepidemic.

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Area of Science:

  • Epidemiology
  • Public Health
  • Infectious Disease Control

Context:

  • Schools present unique environments for tuberculosis (TB) microepidemics due to close living conditions.
  • A specific school setting experienced a TB outbreak among 9-year-old children.

Purpose:

  • To investigate a school-based tuberculosis microepidemic.
  • To identify risk factors and implement control measures in a school setting.

Summary:

  • A female teacher with high bacillar shedding was identified as the index case.
  • Tuberculin testing revealed higher TB conversion rates in classrooms with greater teacher proximity (70% vs. 40%).
  • Three secondary TB cases were detected in children; chemoprophylaxis compliance was higher in children (97%) than teachers (41.6%).

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Impact:

  • The study highlights the importance of identifying high-risk groups based on time spent together to prevent unnecessary resource expenditure and social alarm.
  • Findings support existing literature on school TB outbreaks, emphasizing the need for targeted interventions.
  • The anergy and lack of symptoms in the index case underscore challenges in early detection.