A nurse is educating a client about the diagnostic evaluation for tuberculosis (TB). Which test is commonly used to screen for TB infection and is administered by injecting a small amount of purified protein derivative (PPD) under the skin?
Chest X-ray
Sputum culture
Mantoux tuberculin skin test (TST)
Computed tomography (CT) scan
The Correct Answer is C
A) Incorrect. Chest X-rays are often used to assess lung involvement in TB but are not a primary screening test for TB infection.
B) Incorrect. Sputum culture is used to confirm the presence of TB bacteria in individuals with suspected active TB disease.
C) Correct. The Mantoux TST is a common screening test for TB infection. A small amount of PPD is injected under the skin, and the reaction is assessed after 48-72 hours.
D) Incorrect. CT scans may be used in TB diagnosis but are not typically used for initial screening of TB infection.
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Related Questions
Correct Answer is A
Explanation
A) Correct. LTBI is not contagious, as the bacteria are dormant and not actively causing illness. Active TB disease, on the other hand, is contagious and can be transmitted to others through respiratory droplets.
B) Incorrect. LTBI is not contagious, whereas active TB disease is contagious.
C) Incorrect. LTBI and active TB disease have different symptoms and treatment approaches. LTBI has no symptoms, while active TB disease presents with symptoms and requires treatment to prevent progression.
D) Incorrect. LTBI does not always progress to active TB disease. In fact, many individuals with LTBI do not develop active disease, but they are at risk, especially if their immune system becomes compromised.
Correct Answer is C
Explanation
A) Incorrect. Completing treatment does not guarantee that the client will not develop TB again in the future, but it reduces the risk of a relapse.
B) Incorrect. Stopping treatment early does not reduce the risk of side effects; it increases the risk of drug resistance and a relapse.
C) Correct. Completing the full course of treatment is essential to prevent the development of drug-resistant TB and ensure effective treatment.
D) Incorrect. TB treatment should be completed as prescribed, regardless of the absence of symptoms, to prevent drug resistance and relapse.
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