Which characteristic defines latent tuberculosis?

Which characteristic defines latent tuberculosis?

• A. Contagious and symptomatic
• B. No signs/symptoms but positive TST
• C. Negative TST but positive CXR
• D. Contagious with a positive CXR

Answer: (B)

Latent tuberculosis is characterized by the presence of infection without any observable symptoms or signs of the disease. Individuals with latent tuberculosis do not exhibit symptoms such as coughing, fever, or weight loss, which distinguishes it from active tuberculosis. A positive Tuberculin Skin Test (TST) indicates exposure to the bacteria that cause tuberculosis, supporting a diagnosis of latent infection. However, since the person is asymptomatic and not contagious, they do not pose a risk of spreading the disease to others. This understanding is essential in differentiating between latent and active tuberculosis, which is crucial for treatment and public health measures.

Latent tuberculosis is characterized by the presence of infection without any observable symptoms or signs of the disease. Individuals with latent tuberculosis do not exhibit symptoms such as coughing, fever, or weight loss, which distinguishes it from active tuberculosis. A positive Tuberculin Skin Test (TST) indicates exposure to the bacteria that cause tuberculosis, supporting a diagnosis of latent infection. However, since the person is asymptomatic and not contagious, they do not pose a risk of spreading the disease to others. This understanding is essential in differentiating between latent and active tuberculosis, which is crucial for treatment and public health measures.