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TB Infection Vs Active TB Disease
Learning Objectivesto bring our the difference between TB infection and active TB Disease.
The difference with respect to symptoms and x-ray changes, chances of spreading infection to others and need for treatment.
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| TB Infection | Active TB Disease |
|---|---|
| May not have any signs & symptoms | Has sign and symptoms such as cough for more than two weeks, fever, weight loss and blood in sputum |
| Bacteria are present in dormant state in the body | Bacteria are active and multiplying in the body |
| Doesn't spread TB bacteria to others | May spread TB bacteria to others |
| Chest X-ray usually normal | Lesion in Chest X- ray (usually) |
| May advance to active TB. It is estimated that the lifetime risk of an individual with TB infection for progression to active TB is 5–10%. | Needs treatment for TB disease |
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