Question 1

Which of the following best explains why multiple drugs are used simultaneously in the treatment of active tuberculosis?

Accepted Answer

To inhibit the emergence of drug-resistant Mycobacterium tuberculosis by attacking the bacteria through different mechanisms

Question 2

A patient with a history of poor adherence to anti-TB therapy is diagnosed with multidrug-resistant tuberculosis (MDR-TB). Which of the following is the most likely reason for the development of MDR-TB in this patient?

Accepted Answer

The patient’s inconsistent medication use allowed drug-resistant strains to survive and multiply

Question 3

Which of the following statements about Mycobacterium avium Complex (MAC) is correct?

Accepted Answer

MAC is found in water and soil and rarely causes disease in immunocompetent individuals

Question 4

A 45-year-old man with HIV is diagnosed with active tuberculosis. Why is he at increased risk for developing extensively drug-resistant TB (XDR-TB)?

Accepted Answer

His immunosuppressed state allows for the development and transmission of drug-resistant strains

Question 5

Which of the following is NOT a recommended strategy to increase patient adherence to tuberculosis drug therapy?

Accepted Answer

Reducing the number of drugs to a single agent

Question 6

A patient with active TB has been on therapy for 3 months but still has a positive sputum culture. Which of the following is the most appropriate next step?

Accepted Answer

Evaluate for nonadherence and possible drug-resistant organisms, and consider alternate therapy

Question 7

Which of the following best describes the four phases of tuberculosis initiation and progression?

Accepted Answer

Transmission, primary infection, latent tuberculosis infection (LTBI), active tuberculosis

Question 8

A nurse is working in a prison where several inmates have been diagnosed with MDR-TB. Which of the following actions is most critical to prevent further transmission?

Accepted Answer

Implementing Directly Observed Therapy (DOT) and tracking contacts of active cases

Question 9

Which of the following is a major public health concern associated with extensively drug-resistant TB (XDR-TB)?

Accepted Answer

XDR-TB is resistant to both first-line and second-line anti-TB drugs, leaving few or no effective treatment options

Question 10

A patient with latent tuberculosis infection (LTBI) is being considered for therapy. What is the primary goal of treating LTBI?

Accepted Answer

To prevent the development of active tuberculosis and minimize transmission

Question 11

Which of the following populations is at highest risk for developing active tuberculosis in the United States?

Accepted Answer

Foreign-born immigrants from countries where TB is common

Question 12

A patient with a history of alcohol use and abnormal liver function is starting anti-TB therapy. Which of the following is the most important monitoring strategy for this patient?

Accepted Answer

Monitor for signs of liver disease and perform baseline liver function tests

Question 13

Which of the following statements about the duration of active tuberculosis treatment is correct?

Accepted Answer

Treatment continues for at least 6 months or 3 months after cultures become negative

Question 14

A 30-year-old woman is diagnosed with latent TB infection. She is otherwise healthy. Which of the following is the most appropriate first-line approach to her treatment?

Accepted Answer

Initiate first-line anti-TB agents to prevent progression to active disease

Question 15

Which of the following is a key role of nurses in tuberculosis control programs?

Accepted Answer

Administering TB medications under Directly Observed Therapy (DOT)

Question 16

A patient with suspected MDR-TB is not responding to initial therapy after two months. What is the most likely reason for this delayed response?

Accepted Answer

Drug resistance was not suspected until after prolonged ineffective therapy

Question 17

Which of the following best describes the transmission of Mycobacterium avium Complex (MAC)?

Accepted Answer

MAC is transmitted by inhalation of infected water droplets and is not spread from person to person

Question 18

Which of the following is a major challenge in the global control of MDR-TB and XDR-TB?

Accepted Answer

Delayed diagnosis and lack of adequate diagnostic laboratories contribute to ongoing transmission

Question 19

A patient with active TB is being treated with a standard four-drug regimen. After 2 weeks, he reports improvement in symptoms. Which of the following best explains this clinical response?

Accepted Answer

Adequate drug therapy typically produces improvement within 2 to 3 weeks, including decreased fever and cough

Question 20

Which of the following equations best represents the relationship between the number of drugs used ($$n) $$and the probability of developing drug resistance ($$P) in $$tuberculosis therapy, assuming each drug acts independently and the probability of resistance to each drug is $$p$$?

Accepted Answer

$$P = p^n$$

Drug Therapy for Tuberculosis and Mycobacterium avium Complex Disease: Microbiology and Clinical Management

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