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[Clinical course of tuberculosis in young children, vaccinated and non-vaccinated with BCG vaccine]
Insights
Infant tuberculosis primarily affects intrathoracic lymph nodes. Early adult diagnosis and infant chemoprophylaxis are more vital than BCG vaccination for high-risk infants.
Area of Science:
- Pediatrics
- Infectious Diseases
- Public Health
Background:
- Tuberculosis (TB) remains a significant global health challenge, particularly in vulnerable infant populations.
- Understanding the specific forms and risk factors of infant TB is crucial for effective prevention and treatment strategies.
Purpose of the Study:
- To analyze the prevalence and characteristics of different forms of tuberculosis in infants.
- To compare TB presentation in infants under one year versus older infants.
- To evaluate the relative importance of various preventive measures in high-risk settings.
Main Methods:
- Retrospective analysis of tuberculosis cases in two infant groups: under 1 year (n=27) and older infants (n=150).
- Categorization and comparison of TB forms, including intrathoracic lymph node involvement and severe disseminated disease.
- Assessment of epidemiological factors, focusing on contact with infectious tuberculous patients.
Main Results:
- Intrathoracic lymph node involvement was the most common form of TB across all infant age groups studied.
- Severe TB manifestations, such as tuberculous meningitis and disseminated TB, were significantly more frequent in infants under one year of age.
- Close contact with infectious tuberculous individuals was identified as a critical epidemiological factor.
Conclusions:
- Early diagnosis of tuberculosis in adult contacts and proactive preventive treatment, especially chemoprophylaxis, are paramount for reducing infant TB incidence.
- While BCG vaccination has a role, its impact may be less significant than early diagnosis and chemoprophylaxis in environments with high TB transmission.
- Targeted interventions focusing on adult screening and infant prophylaxis are essential for controlling infant tuberculosis.
Abstract:
As shown by the analysis of tuberculosis forms in 27 infants under 1 year of age (group 1) and 150 infants of older age (group 2), the involvement of the intrathoracic lymph nodes holds the first place among tuberculosis forms encountered in infants. Severe infection (tuberculous meningitis, disseminated tuberculosis) occurred more frequently in group 1. The authors emphasize epidemiological significance of contacts with tuberculous patients. To decrease infant tuberculosis incidence rate, it is of much more importance to make early diagnosis in the adults, to give infants preventive treatment, chemoprophylaxis in particular, than to perform BCG vaccination under conditions of close contacts with tuberculous subjects.