Why would I be tested?
To help determine whether or not you may have been exposed to and become infected by the Mycobacterium tuberculosis (TB) bacteria

When would I be tested?
When you have diseases or conditions that weaken your immune system and put you at a greater risk of developing active tuberculosis. When you have had close contact with someone who has active TB, or work or live in a high risk environment. When you have lived for a period of time in a foreign country where TB may be more common. Sometimes as part of an examination prior to starting a new job (such as a healthcare worker).

Sample required?
No sample is required. A small amount of purified protein derivative (PPD) solution is injected just under the first layer of skin of your inner forearm.