Tuberculosis (TB) is a contagious infection caused by bacteria called Mycobacterium tuberculosis. It mainly affects the lungs, but it can also spread to other parts of the body like the brain, spine, or kidneys.
🧬 How Does TB Spread?
TB spreads through the air. When a person with active TB in their lungs coughs, sneezes, or talks, they release bacteria into the air. If someone else breathes in the bacteria, they can become infected.
Important: TB does not spread through handshakes, food, or sharing personal items.
🔥 Types of TB
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Latent TB (Silent)
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The bacteria are in your body, but you have no symptoms.
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You are not contagious.
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It can become active later if your immune system weakens.
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Active TB
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You have symptoms.
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You can spread TB to others.
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Needs immediate treatment.
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⚠️ Common Symptoms of Active TB
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Persistent cough (more than 2–3 weeks)
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Coughing up blood
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Chest pain
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Fever
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Night sweats
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Weight loss
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Fatigue (feeling weak)
🧪 How is TB Diagnosed?
Doctors use several methods:
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Chest X-ray
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Sputum test (mucus from your lungs)
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TB skin test or blood test
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In some cases, CT scans or other special tests
💊 How is TB Treated?
TB is curable, but treatment takes a long time — usually 6 months or more.
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You need to take several antibiotics every day as prescribed.
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It’s very important to complete the full treatment — even if you feel better — to prevent the TB from coming back or becoming resistant.
❗ What is Drug-Resistant TB?
Sometimes, TB bacteria become resistant to the usual medicines if:
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You stop taking treatment early
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You miss doses
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The wrong drugs are used
This type is harder to treat and needs stronger medications.
🛡️ Can TB Be Prevented?
Yes!
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BCG vaccine (given in many countries at birth)
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Cover your mouth when coughing
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Ventilate rooms well
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Regular screening if you're in a high-risk group (health workers, people living with TB patients)
👫 Who is Most at Risk?
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People with weakened immune systems (like HIV patients)
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Elderly or malnourished individuals
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People living in crowded or poorly ventilated places
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Health care workers
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Smokers and people with diabetes
💬 Final Tip:
TB is not a death sentence. It can be cured completely with the right treatment and care. Early diagnosis and regular medication are the keys to full recovery.