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Tuberculosis (TB) Test - Servicio médico Clínica Hispana Airline Houston TX
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Lab & testing

Tuberculosis (TB) Test

Tuberculosis (TB/PPD) test in Houston, TX. For work and school, in Spanish, with affordable pricing.

Tuberculosis testing at Clínica Hispana Airline, walk-in. It is the test required for work, school and immigration filings.

The two ways to do it

  • **Skin test (PPD).** A small amount is injected under the skin of the forearm, and you have to **come back in 48 to 72 hours** for someone on the medical team to read it. Reading it yourself does not count: what is measured is the firmness, not the redness, and that distinction is what gets misread at home.
  • **Blood test (IGRA).** A single draw, no return visit needed. It is the right choice if you were given the **BCG** vaccine, because that vaccine can make the skin test positive without there being any infection.

Many people vaccinated with BCG in their home country get an unnecessary scare from a PPD. If that applies to you, say so beforehand and the right test gets chosen.

If it is positive

A positive result means contact with the bacteria, **not necessarily active disease**. Most people with a positive test have latent infection: the bacteria are dormant, cause no symptoms and are not contagious. To tell the two apart, a **chest X-ray** is done and symptoms are assessed.

Important: if you have ever had a positive PPD, the skin test should not be repeated. Say so and it gets resolved with a different study.

For the immigration exam

It is included in the I-693. See [immigration medical exam](/services/examenes-inmigracion).

Included in this service

Skin test (PPD) and blood test (IGRA)
Read by medical staff
Alternative for those vaccinated with BCG
Valid for work, school and immigration

Ready to schedule your appointment?

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Frequently Asked Questions