A 6-year-old girl presents with multiple honey-crusted lesions scattered over both arms, legs, and trunk for 10 days. Mother reports poor hygiene and the child attends a crowded school. Lesions are non-bullous, painless, and some show early signs of crusting. Temperature is 37.2°C. On examination, there is mild cervical lymphadenopathy but no cellulitis. What is the most appropriate next step in management?

Explanation

## Clinical Assessment **Key Point:** This patient has **non-bullous impetigo** with lesions on multiple body sites. However, the clinical picture — no fever (37.2°C is normal), no cellulitis, only mild cervical lymphadenopathy (reactive, not suppurative), and no systemic toxicity — does not mandate oral antibiotics. Current evidence-based guidelines (AAP, IDSA, British Association of Dermatology) recommend **topical mupirocin 2% as first-line therapy** for non-bullous impetigo regardless of the number of lesions, unless there is systemic involvement or treatment failure. ## Impetigo Management Algorithm ``` Non-bullous impetigo | ├── No systemic signs (no fever, no cellulitis, no toxicity) | → Topical mupirocin 2% TDS × 5–7 days ✔ | ├── Systemic signs / extensive involvement / immunocompromised | → Oral antibiotic (cephalexin or cloxacillin) | └── Hospitalization / IV antibiotics → Only for sepsis, SSSS, or severe cellulitis ``` ## Why Topical Mupirocin Alone is Correct **High-Yield:** The IDSA 2014 guidelines and multiple RCTs (Koning et al., Cochrane 2012) demonstrate: - **Topical mupirocin is equivalent to oral antibiotics** for non-bullous impetigo without systemic signs. - Adding oral antibiotics to topical therapy does not improve cure rates in uncomplicated cases and increases antibiotic resistance risk. - The presence of lesions on multiple body sites alone does NOT constitute an indication for oral antibiotics in the absence of systemic toxicity, cellulitis, or immunocompromise. **Clinical Pearl:** Mild cervical lymphadenopathy is a **reactive finding** commonly seen with impetigo and does NOT indicate systemic infection requiring oral antibiotics. It resolves with successful topical treatment. ## Why Other Options Are Incorrect | Option | Reason Incorrect | |---|---| | **B) Oral cephalexin + topical mupirocin** | Combination not superior to topical alone in uncomplicated non-bullous impetigo; over-treatment | | **C) Oral cloxacillin alone** | Topical therapy preferred; monotherapy without topical mupirocin is suboptimal | | **D) IV antibiotics / hospitalization** | No systemic toxicity, no SSSS, no sepsis — hospitalization not indicated | ## Topical Mupirocin Regimen - **Mupirocin 2% ointment** applied TDS (three times daily) to all lesions - Duration: **5–7 days** - Gently remove crusts with warm water before application to improve penetration - Advise hand hygiene and avoid sharing towels/clothing to prevent school transmission **Reference:** IDSA Clinical Practice Guidelines for Skin and Soft Tissue Infections (Stevens et al., CID 2014); Fitzpatrick's Dermatology, 9th edition.