Preventable childhood tuberculosis in Alabama: implications and opportunity

Area of Science:

• Public Health
• Epidemiology
• Pediatric Infectious Diseases

Background:

• Childhood tuberculosis (TB) cases serve as key indicators of recent community transmission and the efficacy of TB control strategies, particularly contact investigation.
• Trends in childhood TB morbidity reflect the success of public health interventions in preventing disease spread.

Purpose of the Study:

• To evaluate preventable childhood TB cases and their implications within the context of evolving TB morbidity trends in Alabama.
• To identify factors contributing to preventable childhood TB cases and inform targeted public health strategies.

Main Methods:

• Analysis of statewide TB morbidity trends in children from 1983 to 1997.
• Classification of childhood TB cases diagnosed between 1992 and 1997 as preventable or not preventable based on a standardized definition.
• Examination of case characteristics, disease rates over time, and reasons for preventable classifications.

Main Results:

• Nonwhite children exhibited significantly higher TB disease rates (rate ratio: 5.7) compared to white children between 1983-1997.
• Despite a national decline, the overall childhood TB rate in Alabama increased significantly since 1990, surpassing the adult white case rate in 1996.
• Of 120 childhood TB cases (1992-1997), 21% were preventable, primarily due to contact investigation failures, delayed evaluation, and source case noncompliance.

Conclusions:

• Childhood TB is disproportionately affecting Alabama's nonwhite population, particularly African Americans, with a rising incidence contrary to national trends.
• The median age of childhood TB cases is decreasing, suggesting a need for urgent public health interventions.
• Enhanced training in contact investigation and further research are essential to effectively manage and reduce childhood TB in Alabama.