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Tuberculosis (TB) is a potentially serious bacterial infection caused by Mycobacterium tuberculosis, primarily affecting the lungs but capable of attacking any part of the body, including the kidney, spine, and brain.1 While preventable and curable, TB remains one of the world’s deadliest infectious diseases, making public awareness and early diagnosis vital.2
Understanding the difference between being exposed to the bacteria and developing the active disease is the first essential step in proactive healthcare.
Latent vs. Active Tuberculosis
When a person breathes in TB bacteria, their body’s immune system usually walls it off. This leads to two possible scenarios:
| Condition | Description | Contagious? |
| Latent TB Infection (LTBI) | TB bacteria live in the body without making the person sick. They have no symptoms. The only evidence is a positive blood or skin test. | No. People with LTBI cannot spread TB bacteria to others. |
| Active TB Disease | The TB bacteria multiply and attack the lungs or other parts of the body, causing symptoms. | Yes. People with active TB in the lungs or throat can spread the disease. |
🛑 Recognizing the Signs of Active Tuberculosis
Active TB disease requires immediate medical attention.3 The symptoms often develop slowly and can be overlooked, but they usually last for weeks or months.
Key Symptoms of Active TB:
- Persistent Cough: A cough that lasts three weeks or longer.
- Hemoptysis: Coughing up blood or bloody sputum (a cough that is often more severe than one caused by Pneumonia).4
- Fever and Chills: Unexplained fever, especially low-grade.5
- Night Sweats: Soaking night sweats, even when the room is cool.6
- Unexplained Weight Loss and loss of appetite.7
- Fatigue: Persistent, severe tiredness that doesn’t improve with getting sufficient sleep.8
🛡️ Treatment: The Key is Consistency
If a person is diagnosed with active Tuberculosis, treatment involves taking a combination of antibiotics for a very long period—usually six to nine months.9
- Crucial Adherence: The single most important aspect of TB treatment is completing the entire course of medication exactly as prescribed by your healthcare provider.10 Stopping early or skipping doses can lead to antibiotic resistance, which makes the TB much harder and more expensive to treat (known as MDR-TB or XDR-TB).11
- Directly Observed Therapy (DOT): For some patients, public health programs use DOT, where a health worker watches the patient swallow every dose of medicine. This is done to ensure the treatment is completed and prevent the spread of drug-resistant strains.
- Latent TB Treatment: People with LTBI often take antibiotics for a shorter period (often 3 to 4 months) to prevent the infection from progressing to the active, contagious stage.
Prevention and Healthcare
If you have been exposed to someone with active TB, you must have regular checkups and get tested.
- Screening: TB skin tests (TST) and TB blood tests (IGRA) are used to screen for infection.12
- Ventilation: TB spreads through the air.13 Good ventilation in homes, workplaces, and public transportation can reduce the concentration of TB bacteria.14
- Immunity: Maintaining a strong immune system through positive habits like proper nutrition (to prevent Anemia) and managing stress effectively helps the body control the bacteria.
By seeking prompt testing and adhering strictly to medical advice, we can prevent the spread of Tuberculosis and ensure the health of both individuals and the community.