Signs and symptoms of latent TB
Latent tuberculosis (TB) infection does not cause any symptoms, and the person infected with TB bacteria does not feel sick. However, there are certain signs and symptoms that might suggest the presence of latent TB, including:
1. Positive TB skin test or blood test: A person with latent TB will have a positive reaction to a tuberculin skin test (TST) or interferon-gamma release assay (IGRA) blood test.
2. Chest X-ray findings: In some cases, an abnormality may be seen on a chest X-ray, although it is typically less severe than active TB.
3. History of exposure: Individuals who have been in close contact with someone with active TB disease are more likely to have latent TB.
4. Previous treatment: Individuals who have been treated for active TB in the past may still have traces of the bacteria in their body but are no longer contagious.
It is important to note that latent TB infection can progress to active TB disease if left untreated, resulting in symptoms such as persistent cough, fatigue, weight loss, night sweats, and chest pain. Therefore, it is crucial to diagnose and treat latent TB to prevent the development of active TB.