Bacterial and viral skin infections Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

Learning videos

Flashcards

Expert reviewed

Spaced Repetition

Mobile app

Custom Quizzes

1 of 10

A 34-year-old man presents to the clinic due to a skin lesion. The lesion started as a small vesicle that continues to enlarge. It is not painful or itchy. The patient was stationed in the military in Iraq for the last 5 years and just returned to the United States 6 months ago. Examination of the lesion reveals a black necrotic lesion surrounded by edema as shown in the picture below. Which of the following is most likely responsible for the edema surrounding this skin lesion?

A close up view of an irritated skin lesion on a fleshy area, possibly a limb. The center is a dark, scabbed square with a raw, red border. Skin around it is inflamed.

A close up view of an irritated skin lesion on a fleshy area, possibly a limb. The center is a dark, scabbed square with a raw, red border. Skin around it is inflamed.

^{Source: Wikimedia Commons}

Elimination tool

Choose an option:

An exotoxin produced by the bacteria that acts as a protease

Increased vascular permeability due to inflammatory cytokines released by macrophages

An exotoxin produced by the bacteria that acts like adenylate cyclase

Increased vascular permeability due to inflammatory cytokines released by T-cells

Increased vascular permeability due to the degranulation of mast cells in the local tissue