When you have a tb test, do you only get the bump if you test positive/have been!
Question: When you have a tb test, do you only get the bump if you test positive/have been exposed to tb!?
if i have not been exposed to tb, a bump would NOT appear, right!?
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Answers:
A positive Mantoux test means that you've been exposed to tuberculosis sometime in your life!. It doesn't necessarily mean that you have the active form!. So yes, the test is considered positive if a bump appears at the insertion site of the skin test!.Www@Answer-Health@Com
A bump at the insertion site is a little elementary as to if you are positive or not !.!.!.!.
Reaction in the skin to tuberculin PPD begins when specialized immune cells, called T cells, which have been sensitized by prior infection, are recruited by the immune system to the skin site where they release chemical messengers called lymphokines !.!.!.
These lymphokines induce induration (a hard, raised area with clearly defined margins at and around the injection site) through local vasodilation (expansion of the diameter of blood vessels) leading to fluid deposition known as edema, fibrin deposition, and recruitment of other types of inflammatory cells to the area !.!.!.!.
The basis of the reading of the skin test is the presence or absence and the amount of induration (localized swelling)!. The diameter of the induration should be measured transversely (for example, perpendicular) to the long axis of the forearm and recorded in millimeters!. The area of induration (palpable, raised, hardened area) around the site of injection is the reaction to tuberculin!. Again, redness is not measured!.
A tuberculin reaction is classified as positive based on the diameter of the induration in conjunction with certain patient-specific risk factors!. 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 a person with underlying kidney disease, diabetes, or a health-care worker or personal contact of someone with active TB, 10 mm of induration is considered a positive skin test
Www@Answer-Health@Com
Reaction in the skin to tuberculin PPD begins when specialized immune cells, called T cells, which have been sensitized by prior infection, are recruited by the immune system to the skin site where they release chemical messengers called lymphokines !.!.!.
These lymphokines induce induration (a hard, raised area with clearly defined margins at and around the injection site) through local vasodilation (expansion of the diameter of blood vessels) leading to fluid deposition known as edema, fibrin deposition, and recruitment of other types of inflammatory cells to the area !.!.!.!.
The basis of the reading of the skin test is the presence or absence and the amount of induration (localized swelling)!. The diameter of the induration should be measured transversely (for example, perpendicular) to the long axis of the forearm and recorded in millimeters!. The area of induration (palpable, raised, hardened area) around the site of injection is the reaction to tuberculin!. Again, redness is not measured!.
A tuberculin reaction is classified as positive based on the diameter of the induration in conjunction with certain patient-specific risk factors!. 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 a person with underlying kidney disease, diabetes, or a health-care worker or personal contact of someone with active TB, 10 mm of induration is considered a positive skin test
Www@Answer-Health@Com