Characteristics of multidrug-resistant tuberculosis in Namibia

Area of Science:

• Public Health
• Epidemiology
• Infectious Diseases

Background:

• Multidrug-resistant tuberculosis (MDR-TB) poses a significant global health threat.
• Understanding the epidemiology and risk factors for MDR-TB in specific regions like Namibia is crucial for effective control.

Purpose of the Study:

• To investigate the epidemiological characteristics of MDR-TB in Namibia.
• To identify potential risk factors associated with the development of MDR-TB.

Main Methods:

• A case-control study was conducted using medical records and patient questionnaires.
• Cases were defined as laboratory-confirmed MDR-TB patients, and controls had drug-susceptible TB or were on standard treatment regimens.
• The study included 117 MDR-TB cases and 251 TB controls diagnosed between January 2007 and March 2009.

Main Results:

• Previous TB treatment was strongly associated with MDR-TB (OR 28.7).
• MDR-TB cases were more likely to have a history of hospitalization (OR 1.9) and a household member with MDR-TB (OR 5.1).
• These associations remained significant even after controlling for current hospitalization or HIV infection.

Conclusions:

• Previous TB treatment, prior hospitalization, and household MDR-TB exposure are significant risk factors for developing MDR-TB in Namibia.
• Findings suggest deficiencies in current TB control practices.
• Strengthening basic TB control measures, including laboratory confirmation, directly observed therapy, and infection control, is essential for MDR-TB prevention.