An outbreak of tuberculosis in a children's hospital

Area of Science:

• Infectious Diseases
• Pediatric Medicine
• Public Health

Background:

• A smear-positive pulmonary tuberculosis case was identified in a mother whose child was admitted to a children's hospital.
• This led to a significant nosocomial outbreak involving over 400 contacts.

Purpose of the Study:

• To investigate the transmission dynamics and risk factors associated with a tuberculosis outbreak in a pediatric hospital setting.
• To identify patient groups at higher risk for developing clinical tuberculosis disease following exposure.

Main Methods:

• A retrospective cohort study was conducted among exposed inpatients.
• Data on exposure duration, proximity, and patient diagnoses were analyzed to determine infection predictors.

Main Results:

• Thirty inpatients, three outpatients, two sibling visitors, and one staff member acquired tuberculosis infection.
• Independent predictors of infection risk included exposure duration, proximity, and primary diagnosis.
• Children with neoplastic disease on cytotoxic and immunosuppressive therapy were at increased risk for clinical and disseminated disease.

Conclusions:

• The study identified key risk factors for tuberculosis transmission within a hospital.
• Findings underscore the importance of rigorous contact tracing and follow-up for vulnerable populations, especially immunocompromised children.
• Recommendations for managing tuberculosis in healthcare settings and among close contacts are supported.