Bacterial Infections USMLE Step 1 Practice Question
A 36 year old woman presents with several weeks of jaw pain and a slowly enlarging firm neck mass that began after a dental procedure. She also has a history of prolonged intrauterine device use. Examination reveals multiple draining sinus tracts with yellow granules in the exudate. Which of the following organisms is the most likely cause of this infection?
Answer choices
- AStaphylococcus aureus
- BActinomyces israeliiCorrect answer
- CAspergillus fumigatus
- DNocardia asteroides
- EFrancisella tularensis
- FStreptomyces somaliensis
See the full explanation
Get the correct-answer rationale, why each distractor is wrong, the underlying mechanism, and high-yield associations — plus adaptive practice that targets your weak areas — with a free MedBoardPRO account.