What Does It Mean When A TB Test Is Indeterminate?

Is latent TB curable?

There is no guaranteed “cure” for latent tuberculosis.

“People infected with TB bacteria have a lifetime risk of falling ill with TB…” with those who have compromised immune systems, those with diabetes and those who use tobacco at greater risk..

How did I get latent TB?

Latent TB occurs when a person has the TB bacteria within their body, but the bacteria are present in very small numbers. They are kept under control by the body’s immune system and do not cause any symptoms.

What is the difference between T spot and QuantiFERON?

The T-SPOT. TB method uses separate mixtures of ESAT-6 and CFP-10 synthetic peptides as Mycobacterium tuberculosis-specific antigens, whereas QFT-GIT uses a single mixture of synthetic ESAT-6, CFP-10, and TB7.

Can you shower after a TB test?

A: You can take showers and baths as you normally do. Q: What do I do if my arm itches or blisters? A: Put an ice cube in a washcloth and place it on your arm. DO NOT SCRATCH!

How do you know if your TB test is negative?

The test is “negative” if there is no bump (or only a very small bump) at the spot where the fluid was injected. A negative TB skin test usually means that you don’t have TB. In some situations, you may need to have another TB skin test later.

What are the side effects of a TB test?

AdvertisementBleeding at the injection site (occurring up to 3 days after the skin test)blistering, crusting, or scabbing at the injection site.deep, dark purple bruise at the injection site (occurring up to 3 days after the skin test)hard lump at the injection site.hives.More items…•Feb 1, 2021

How many years does a TB test last?

TB tests are valid for 4 years (California Education Code Section 49406). What happens if my TB test expires? In order to work, employees must have a current test showing freedom from active TB on file with Human Resources.

Can a positive TB blood test be wrong?

TB can be wrongly diagnosed Testing for active TB disease through antibodies or antigens found in the blood is extremely difficult. Patients can have different antibody responses suggesting that they have active TB even when they do not.

What does an indeterminate Quantiferon gold mean?

These people are deemed indeterminate by QFT, which means a result cannot be given—which is appropriate if they do not have a sufficient immune response to measure. Most people with indeterminate responses due to low CD4+ T-cells counts test negative by the TST (which does not have a control for immune status).

Does a chest xray show latent TB?

Latent Tuberculosis Infection (LTBI) is also called “sleeping” TB because the germs will stay asleep as long as your body can fight them off. You may have a positive test for TB but a normal Chest x-ray test if you have “sleeping” TB.

What causes false positive TB blood test?

False positive results happen with the skin test because the person has been infected with a different type of bacteria, rather than the one that causes TB. It can also happen because the person has been vaccinated with the BCG vaccine. This vaccine is widely used in countries with high rates of TB infection.

Does Tuberculosis stay in your system forever?

Many people who have latent TB infection never develop TB disease . In these people, the TB bacteria remain inactive for a lifetime without causing disease . But in other people, especially people who have weak immune systems, the bacteria become active, multiply, and cause TB disease .

Can a person with TB go to work?

You need to stay home from work or school so that you don’t spread TB bacteria to other people. After taking your medicine for a few weeks, you will feel better and you may no longer be infectious to others. Your doctor or nurse will tell you when you can return to work or school or visit with friends.

Will QuantiFERON gold always be positive after treatment?

Since most patients remained QFT-TB positive after therapy, the test should not be used to monitor the effect of preventive therapy. Prospective studies are needed in order to determine the usefulness of IGRA tests during therapy.

What if TB Gold test is positive?

A “positive” TB blood test result means you probably have TB germs in your body. Most people with a positive TB blood test have latent TB infection. To be sure, your doctor will examine you and do a chest x-ray. You may need other tests to see if you have latent TB infection or active TB disease.

What happens if your sputum test is negative?

When a patient is “culture negative,” there are no detectable TB organisms in his/her sputum and the patient is considered completely non-contagious. The likelihood of transmission derives primarily from factors related to the TB patient or the environments in which contacts are exposed.

What is a normal TB test result?

In a healthy person whose immune system is normal, induration greater than or equal to 15 mm is considered a positive skin test. If blisters are present (vesiculation), the test is also considered positive. In some groups of people, the test is considered positive if induration less than 15 mm is present.

What do you do if QuantiFERON gold is indeterminate?

The options are to repeat QFT-G with a newly obtained blood specimen, administer a TST, or do neither. For persons with an increased likelihood of M. tuberculosis infection who have an indeterminate QFT-G result, administration of a second test, either QFT-G or TST, might be prudent.

What if my QuantiFERON is positive?

You have a positive Tuberculin Skin Test (TST) or QuantiFERON blood test: what does this mean? If your TST (Mantoux) or Quantiferon blood test was found to be positive, this means you have a latent TB infection, but usually not the active disease.

How does a TB test look like when it is positive?

If you have a raised, hard bump or there’s swelling on your arm, you have a positive test. That means TB germs are in your body. But it doesn’t always mean you have active tuberculosis disease. If you don’t have a reaction, your test is negative.

Can you drink alcohol during a TB skin test?

Warning: Frequent or heavy drinking of alcoholic beverages (wine, beer, and liquor) while taking treatment for latent TB infection can be dangerous. Check with your doctor or nurse for more information..