# A 6-year-old child is brought to the pediatric clinic with skin lesions on the face. Which assessment finding would be most characteristic of impetigo?

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## 문제

A 6-year-old child is brought to the pediatric clinic with skin lesions on the face. Which assessment finding would be most characteristic of impetigo?

## 보기

1. Honey-crusted lesions around the mouth and nose **✔ 정답**
2. Silvery scales on erythematous plaques
3. Vesicles arranged in a linear pattern
4. Circular patches with central clearing

**정답: 1**

## 해설

Honey-crusted lesions around the mouth and nose are the hallmark sign of impetigo, caused by Staphylococcus aureus or Streptococcus pyogenes. Other options describe different conditions: silvery scales suggest psoriasis, linear vesicles suggest contact dermatitis, and circular patches suggest tinea corporis.

## 심화 해설

Core Clinical Manifestation of Impetigo

The most characteristic assessment finding for impetigo in a 6-year-old child is the presence of honey-crusted lesions. These lesions typically appear around the mouth and nose, which are common sites of initial colonization and trauma. This classic presentation distinguishes it from other pediatric skin conditions.

Pathophysiology and Clinical Rationale

Impetigo is a highly contagious bacterial infection of the superficial epidermis [1]. It is caused by Group A Streptococcus (Strep A) and Staphylococcus aureus, either alone or in combination [1]. The infection begins when bacteria enter through a break in the skin, such as a scratch or insect bite. The initial lesion is a thin-walled vesicle or pustule that ruptures easily. The exudate from this lesion dries to form the pathognomonic thick, adherent, honey-colored crust. The face, specifically the perioral and perinasal areas, is a predilection site because of frequent touching and the presence of nasal carriage of the causative organisms. The disease is acute and self-limited, but recurrence is common in some settings, emphasizing the importance of proper hygiene and treatment to prevent chronicity [1].

Differential Diagnosis of Incorrect Options

Understanding why the other options are incorrect is crucial for NCLEX-RN success. Each describes a key feature of a different dermatological condition.

| Option | Associated Condition | Key Distinguishing Feature |
| --- | --- | --- |
| 2. Silvery scales on erythematous plaques | Psoriasis | A chronic, immune-mediated condition with well-demarcated plaques covered by silvery-white scales, commonly found on extensor surfaces and the scalp, not infectious crusts. |
| 3. Vesicles arranged in a linear pattern | Contact dermatitis (e.g., poison ivy) | An allergic reaction to an external agent. The linear arrangement of vesicles is a hallmark of the skin brushing against the allergenic plant, which is distinct from the scattered, crusted lesions of impetigo. |
| 4. Circular patches with central clearing | Tinea corporis (Ringworm) | A superficial fungal infection presenting as an annular, erythematous patch or plaque with a raised, scaly border and central clearing. It lacks the honey-colored crust of impetigo. |

Implications for Nursing Practice and Public Health

Impetigo is highly contagious and spreads through direct contact with an infected person or contaminated fomites [1, 2]. The burden of disease is significantly higher in settings with overcrowding and poor hygiene, as demonstrated in conflict-affected areas where access to water, sanitation, and hygiene (WaSH) is compromised . For the NCLEX-RN, a nurse must prioritize teaching about infection control: keeping the child's fingernails short to prevent scratching and autoinoculation, using separate towels and linens, and emphasizing meticulous hand hygiene. The child should be excluded from school or daycare until 24 hours after appropriate antibiotic therapy has been initiated. Recognizing that impetigo occurs mainly in early childhood and can become a chronic, recurrent issue in endemic settings guides the nurse to assess the living environment and provide targeted family education on prevention strategies [1].

References (research sources)

- [1]Standardization of Epidemiological Surveillance of Group A Streptococcal Impetigo.Research articleMiller KM, Carapetis JR, Cherian T, Hay R, Marks M, Pickering J, Cannon JW, Lamagni T, Romani L, Moore HC, Van Beneden CA, Barth DD, Bowen AC, Strep A Vaccine Global Consortium (SAVAC) Burden of Disease Working Group . (2022) · DOI: 10.1093/ofid/ofac249

## 임상 시나리오

Impetigo Assessment in ChildrenRecognizing the Classic Presentation
The hallmark of impetigo is the honey-colored, crusted lesion. These form when vesicles or pustules rupture and the exudate dries. The most common locations are the perioral and perinasal areas.

Impetigo is highly contagious and spreads through direct contact. It is most frequently caused by Staphylococcus aureus or Group A Streptococcus. Assess for a history of minor skin trauma like a scratch or insect bite.

CautionDo not confuse with Herpes Simplex Virus which presents with grouped vesicles on an erythematous base, or tinea corporis which features annular plaques with central clearing. Emphasize hand hygiene to prevent spread.

## 핵심 개념

- **Impetigo** — A highly contagious superficial bacterial skin infection, primarily caused by Staphylococcus aureus or Group A Streptococcus, characterized by honey-colored crusts.
- **Honey-crusted lesions** — The classic presentation of non-bullous impetigo, formed when serous exudate from ruptured vesicles or pustules dries into a thick, adherent, golden-yellow crust.
- **Desmoglein-1** — A cadherin protein in the superficial epidermis responsible for cell-to-cell adhesion; targeted by exfoliative toxins produced by S. aureus in impetigo.
- **Non-bullous impetigo** — The most common form of impetigo, presenting with vesicles or pustules that rapidly rupture and form the pathognomonic honey-colored crusts, often on the face.

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