How do I know if I have latent TB?
Latent TB does not have any symptoms. The only way to find out if you have latent TB bacteria in your body is to have a blood test or skin test.
I have been invited for a TB test. What should I do?
You have been invited for a latent TB test because you are at increased risk of becoming ill with TB. There is no need to be worried. Latent TB can be treated before it can cause active TB, and all testing and treatment for TB is free and confidential for everyone.
Why might I need to be tested for latent TB?
There are some reasons why you may be more likely to have latent TB or have a higher risk of going on to develop active TB if you do already have latent TB:
If you know someone who has or has had TB
If you have settled in England in the last five years from a country where TB is more common
If you work in an occupation that means you are more likely to come into contact with TB
If you have a health condition or take medication that affects your immune system
What is my risk of developing active TB if I do have latent TB?
Without treatment for latent TB, there is about a 1 in 10 chance that you will develop active TB in your lifetime. You are more likely to develop active TB in the first five years after you breathe in TB bacteria, though you may not know when that happened.
Why should I be tested for TB if I do not feel ill?
Latent TB does not have any symptoms, but it has the potential to make you ill. Prevention is better than cure so it is a good idea to get tested for latent TB so that you can take treatment, if necessary, to protect your health in the future.
I have had the BCG vaccination. Surely I don’t need to worry about TB?
You can still develop latent or active TB after you have the BCG vaccination. This is because the vaccination offers limited protection and only for up to 15 years.
I have received a clear chest x-ray, does this mean I do not have latent TB?
TB chest x-rays can only detect active TB in the lungs. This means that you may have latent TB bacteria in your body, even if you have had a clear chest x-ray.
I’m worried that I may have latent TB. What can I do?
If you are worried that you may have latent TB for any reason, but you have not been invited for a test, phone your local chest clinic or GP. They will arrange an appointment for you if necessary. You can find out where your local GP is and how to register by visiting the NHS Choices website.