Notes
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1. Introduction
Tuberculosis (TB) is a contagious bacterial infection caused by Mycobacterium
tuberculosis, primarily affecting the lungs, but can affect other organs.
Key Points:
Spread via airborne droplets
Can be latent (inactive) or active
Major global public health concern
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2. Types of TB
, Type Description
Latent TB Infection present but inactive; no symptoms; not contagious
Active TB Symptomatic, can spread to others
Extrapulmonary TB Affects organs outside lungs (kidneys, spine, lymph nodes)
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3. Risk Factors
Close contact with TB patients
Immunocompromised (HIV, chemotherapy, steroids)
Malnutrition
Substance abuse (alcohol, drugs)
Poor living conditions, crowded areas
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