The Cavity as a Lasting Abode for Tuberculous Bacilli: An Observational Study

Area of Science:

• Pulmonary Medicine
• Infectious Diseases
• Radiology

Background:

• Tuberculosis remains a significant global health challenge.
• Drug-susceptible pulmonary tuberculosis requires effective treatment to prevent persistent infection.
• Sputum smear positivity after treatment indicates ongoing infectivity and potential for treatment failure.

Purpose of the Study:

• To identify factors associated with persistent sputum positivity at 2 months of treatment in drug-susceptible pulmonary tuberculosis patients.
• To investigate the role of demographic and clinical factors in treatment non-response.
• To inform strategies for improved tuberculosis management and control.

Main Methods:

• A cross-sectional study was conducted with 73 newly diagnosed, smear-positive, drug-susceptible pulmonary tuberculosis patients.
• Data on demographic and clinical factors, including chest X-ray findings, were collected.
• Patients were assessed for sputum smear status at 2 months of anti-tubercular treatment.

Main Results:

• 17.8% of patients remained sputum positive after 2 months of treatment.
• The presence of cavities on chest X-ray significantly increased the likelihood (5.5 times) of persistent sputum positivity (p=0.035).
• No other demographic or clinical factors were associated with persistent sputum positivity.

Conclusions:

• Chest X-ray cavities are a strong predictor of persistent sputum positivity in pulmonary tuberculosis patients.
• Patients with CXR cavities may have an unfavorable treatment outcome and remain infectious.
• Enhanced monitoring and directly observed treatment short-course (DOTS) are crucial for patients with CXR cavities to ensure disease control.