Impetigo
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Impetigo
Skin and subcutaneous tissue
Congenital disorders
Infectious, immunologic, and inflammatory disorders
Integumentary disorders
Oral disease
Traumatic and mechanical disorders
Skin and subcutaneous tissue pathology review
Pigmentation skin disorders: Pathology review
Bacterial and viral skin infections: Pathology review
Papulosquamous and inflammatory skin disorders: Pathology review
Vesiculobullous and desquamating skin disorders: Pathology review
Viral exanthems of childhood: Pathology review
Acneiform skin disorders: Pathology review
Skin cancer: Pathology review
Assessments
Flashcards
0 / 9 complete
USMLE® Step 1 questions
0 / 1 complete
High Yield Notes
16 pages
Flashcards
Impetigo
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Questions
USMLE® Step 1 style questions USMLE
0 of 1 complete
A 17-year-old young man presents to his primary care physician for evaluation of lesions on the abdomen. The lesions were fluid-filled sacs that eventually burst, leaving behind yellow, crusted areas of inflammation. The patient is otherwise healthy and does not take any medications. Temperature is 37.7°C (99.9°F), blood pressure is 112/73 mmHg, and pulse is 68/min. Physical examination is notable for the following finding:
Image reproduced from Wikimedia Commons
Which of the following pathogenic factors is most likely responsible for this patient’s clinical presentation?
Image reproduced from Wikimedia Commons
Which of the following pathogenic factors is most likely responsible for this patient’s clinical presentation?
External References
First Aid
2024
2023
2022
2021
Bullae p. 483
impetigo p. 487
Bullous impetigo p. 487
Crust (skin) p. 483
impetigo p. 487
Impetigo p. 483
crusts with p. 487
Streptococcus pyogenes p. , 134
sunburn and p. 492
Summary
Impetigo is a highly contagious skin infection that is most commonly caused by Group A streptococcus and Staphylococcus aureus bacteria. These bacteria often inhabit the skin and mucous membranes without causing any problems, but under certain conditions they can cause impetigo.
The hallmark sign of impetigo is the presence of honey-colored crusts on the skin. The lesions may be small or large, and may occur anywhere on the body. Impetigo may be accompanied by systemic symptoms such as fever, malaise, and swollen lymph nodes.