[Research and control of relapse tuberculosis cases]

Area of Science:

• Public Health
• Infectious Diseases
• Epidemiology

Context:

• Tuberculosis (TB) relapse poses a significant challenge, particularly concerning the risk of acquired drug resistance.
• Limited historical analysis exists on the proportion of TB relapse cases treated with standard short-course regimens and associated drug resistance in Japan.
• Understanding factors contributing to TB relapse and drug resistance is crucial for effective public health strategies.

Purpose:

• To analyze the proportion of drug resistance among relapse tuberculosis (TB) cases in Japan.
• To investigate factors contributing to TB relapse and identify trends in drug resistance over time.

Summary:

• Analysis of relapse TB cases in Japan revealed a decreasing trend in relapse rates from 1977 to 2002.
• The proportion of drug resistance among relapse cases decreased significantly for isoniazid (39% to 16%) and remained stable for rifampicin (around 10%).
• Risk factors for drug resistance included younger age, being foreign-born, and holding a part-time job; treatment failure or default also correlated with higher drug resistance.

Impact:

• Provides essential data on the evolving landscape of tuberculosis relapse and drug resistance in Japan.
• Informs public health interventions and clinical management strategies for TB retreatment.
• Highlights the need for continued surveillance and targeted interventions to combat drug-resistant tuberculosis.