A positive TB blood test or TB skin test indicates that you have been exposed to someone with TB. The next step is to have an evaluation for TB symptoms and a chest x-ray. If the symptom review and chest x-ray are negative, you have latent TB infection. With a normal immune system you have a 10% chance of developing TB disease; half of that risk or 5% is within the first 2 years after becoming infected. The other half of the risk is for the rest of your life.
If you are considered to be high risk for developing TB disease, the health department will treat you with a medication that will prevent that from occurring. It is important to understand that if you have latent TB infection (positive TB blood test or TB skin test, normal chest x-ray, no symptoms of TB), you cannot give anyone else TB. You are NOT infectious.
For other services, please call the TB clinic at 602-372-1407 for more information.