The best diagnostic clue of pulmonary tuberculosis (TB) is:

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ATI PN Pediatrics Proctored Exam 2020 Questions

Question 1 of 5

The best diagnostic clue of pulmonary tuberculosis (TB) is:

Correct Answer: A

Rationale: Isolation of M. tuberculosis from culture is the gold standard for TB diagnosis, providing definitive evidence (CDC). Options B-E are supportive but less specific.

Question 2 of 5

A 16-month-old boy refuses to eat properly. His mother stated that he was eating properly up to 12 months of age. She started a part time job 2 months ago. She is extremely concerned. The boy is very active. The next step in management is:

Correct Answer: D

Rationale: Reassurance suits an active 16-month-old with reduced appetite, possibly due to maternal stress or toddler phase (AAP). A-D are unnecessary without deficiency.

Question 3 of 5

All of the following conditions cause fetal bradycardia (heart rate less than 120 beats/minute) except:

Correct Answer: C

Rationale: Local anesthetics don’t typically cause fetal bradycardia; A-D are known causes (ACOG).

Question 4 of 5

The maternal occupational limit of exposure to radiation for the entire 40 weeks of pregnancy is:

Correct Answer: D

Rationale: 500 mrad is the occupational limit for pregnancy, per NRC. A-C are too low, E is excessive.

Question 5 of 5

Most effective long-term therapy in patients with moderate persistent asthma is:

Correct Answer: C

Rationale: Inhaled steroids are the most effective long-term control for moderate persistent asthma, per GINA guidelines, reducing inflammation. A, B, D, E are less optimal alone.

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