Which statement best describes Latent TB Infection?

Latent TB Infection refers to a state where an individual is infected with the Mycobacterium tuberculosis bacteria, but does not show any symptoms of active tuberculosis (TB) disease. Importantly, people with latent TB do not feel sick and cannot transmit the bacteria to others, which differentiates it from active TB.

In terms of diagnostic indicators, individuals with latent TB typically have a positive skin test (or interferon-gamma release assay), suggesting that they have been exposed to the bacteria and their immune system has reacted. However, unlike those with active TB, their chest radiographs are generally normal, as there is no active disease in the lungs that would produce visible changes.

This understanding is crucial for infection prevention practices, as managing latent TB differs significantly from dealing with active TB, particularly in nursing home environments where both patients and staff need protection from communicable diseases.