Miliary tuberculosis: new insights into an old disease

Area of Science:

• Infectious Diseases
• Pulmonology
• Immunology

Background:

• Miliary tuberculosis (TB) is a severe form of TB caused by widespread Mycobacterium tuberculosis dissemination.
• The HIV/AIDS pandemic and immunosuppressive therapies have altered miliary TB epidemiology, often linked to impaired cell-mediated immunity.
• Non-specific clinical signs and delayed radiographic findings can complicate early diagnosis.

Purpose of the Study:

• To review the epidemiology, clinical presentation, diagnostic methods, and treatment of miliary tuberculosis.
• To highlight challenges in diagnosing miliary TB, including atypical presentations and laboratory findings.
• To discuss current understanding of treatment efficacy and adjunctive therapies.

Main Methods:

• Literature review of miliary tuberculosis, focusing on epidemiology, clinical features, diagnostics, and therapeutics.
• Analysis of diagnostic modalities including sputum culture, molecular methods (PCR), and histopathology.
• Evaluation of treatment responses to first-line anti-TB drugs and the role of corticosteroids.

Main Results:

• Miliary TB is associated with impaired cell-mediated immunity, exacerbated by HIV/AIDS and immunosuppression.
• Atypical presentations and non-specific symptoms can delay diagnosis, necessitating diverse diagnostic approaches.
• While first-line drugs show efficacy, optimal treatment duration and the benefit of corticosteroids remain under investigation.

Conclusions:

• Miliary tuberculosis requires prompt diagnosis and management, especially in immunocompromised individuals.
• Integrated diagnostic strategies combining microbiological, molecular, and histopathological methods are essential for confirmation.
• Further research is needed to establish optimal treatment durations and the role of adjunctive therapies for miliary TB.