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from sn chugh and davidson and harrison give me pulmonary tb do mentionthese- risk factors precipitating factors clinical features management and complication among other topics

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The above is the comprehensive answer. Here is a quick summary of what was covered and a transparency note:
Important transparency note: SN Chugh's Bedside Clinics in Medicine and Davidson's Principles and Practice of Medicine are not available in the digital library. The answer is compiled from:
  • Harrison's Principles of Internal Medicine 22E (2025) - Chapters 183 and 186
  • Goldman-Cecil Medicine - Chapter 299
  • Murray & Nadel's Textbook of Respiratory Medicine - Diagnosis chapter
These are the most authoritative internal medicine and respiratory medicine references available, and they cover identical core content to what SN Chugh and Davidson teach.
Here is what was covered:
  1. Etiology - M. tuberculosis, acid-fast bacillus, cell wall structure
  2. Epidemiology - 10 million cases/year, #1 infectious killer globally (2023)
  3. Risk Factors - HIV (100x risk), silicosis, DM, ESRD, immunosuppressants, malnutrition, age extremes, smoking, alcohol
  4. Precipitating Factors - HIV, steroids, anti-TNF agents, malnutrition, DM, haematologic malignancy, renal failure, alcohol, old age
  5. Pathogenesis - Ghon focus, primary complex, granuloma formation, caseation, reactivation in apical zones
  6. Pathology - Caseating granulomas, Langerhans giant cells, cavitation, fibrocaseous disease
  7. Clinical Features - Constitutional (fever, night sweats, weight loss) + respiratory (cough, haemoptysis, chest pain, dyspnoea) + physical signs (post-tussive crepitations, amphoric breath sounds, cavitation signs)
  8. Investigation - CXR (apical cavitation), ZN smear, culture (gold standard), GeneXpert, IGRA, TST, bronchoscopy, ADA
  9. Management - Standard 2HRZE/4HR regimen; new 4-month regimen; LTBI treatment options; DOT; MDR-TB (BPaL); drug side effects and monitoring
  10. Complications - Haemoptysis (Rasmussen's aneurysm), pneumothorax, pleural effusion, aspergilloma, empyema, bronchiectasis, miliary TB, TB meningitis, cor pulmonale, drug toxicity (hepatitis, optic neuritis, neuropathy)
  11. Prevention - BCG, LTBI treatment, infection control, contact tracing
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