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Help...I'm worried about my TB test!?

2009-12-13 08:12 | By: ukdog.cn | ukdog.cn

Help...I'm worried about my TB test!?

On Monday I got my TB test done...for a new job at a school. Then I went of thursday so they can check for the results...they came out negative. But now I'm worried....maybe the doctor didn't check it good enough because she just looked at the area and touched with her fingers. Now it's starting to itch a lot...I'm not sure if I am even supposed to be scratching it...it itches bad and it's pink now. What should I do...should I be worried?

Reading the PPD Skin Test
The skin reaction that results when a TB-positive person is injected is very specific to TB infection. Therefore, it can be used as a reliable way to identify people who have been infected with TB. The reaction reaches its peak about 48 to 72 hours after the PPD is injected -- the key time to examine the area. Waiting too long or not long enough may cause an underestimation of the reaction and, therefore, affect how the test is read.

A positive test will cause the following symptoms at the injection site:

* Redness
* Itching
* Thickening of the skin (known as induration)

Presence or absence of induration, as well as the size of the induration, are the key indicators that set a positive result apart from a negative one. The extent of redness or bruising is not considered when determining the results of a TB test. Blisters or fluid filled lesions are also considered signs of a positive test.

Special Considerations When Reading a TB Test
Induration sizes that indicate a positive test result can vary under certain circumstances:

* Healthy Immune System -- 15mm

* Weakened Immune System - 5mm

* Kidney Disease or Diabetes Sufferers/Healthcare Workers - 10mm

Understand the Immune Response

What Does it Mean if I Test Positive?
A positive test means that, at some point in your lifetime, you have been exposed and infected with TB. If you have a positive TB test, talk with your doctor about the next step. Your TB infection is most likely latent, meaning it is not active, contagious, or making you sick. Your doctor will most likely prescribe a course of antibiotics to manage your TB. In some cases, a positive test may indicate an active infection. If this is the case, your doctor will discuss symptoms, order any other necessary tests (such as a chest x-ray), and set a course of treatment.

Source(s):

http://aids.about.com/od/vaccinesscreenings/a/tbtest.htm

http://health.rutgers.edu/Immunizations/TB.htm

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