Difficulty: Medium
Average Score: 64%
Simulated
The occupational health nurse assesses a health care worker's purified protein derivative (PPD) test and measures 11 mm of induration. The nurse should interpret this finding as
Correct answer
D
Rationale
An 11 mm induration in a healthcare worker indicates a positive PPD test, suggesting TB exposure, but further testing (e.g., chest X-ray, sputum analysis) is needed to confirm active TB. It is not confirmatory for pulmonary TB, not false-negative, and isolation is premature.