Core Nursing Explanation
Key Concept Analysis: This question tests the priority nursing intervention for a child with
Scabies, a highly contagious skin infestation caused by the
Sarcoptes scabiei mite. The core nursing principle here is
Infection Control and Transmission Prevention. While managing symptoms like itching is part of care, the
Key Point! is that scabies spreads through prolonged skin-to-skin contact and can infest entire households. Therefore, the most critical intervention is one that breaks the chain of infection at the community/family level.
Answer Rationale: Option ④ is correct because it directly addresses the root cause of transmission.
Key Point! Successful scabies treatment requires two simultaneous actions: 1) Correct application of the prescribed
Scabicide (e.g., permethrin cream) to kill mites and eggs, and 2) Treating
all asymptomatic household members and close contacts to prevent
Reinfestation. The nurse's role in educating the family ensures this protocol is followed, making it the highest priority intervention to cure the child and protect public health.
Distractor Analysis:
- Option ① (Apply topical antibiotic): Watch out for confusion! Topical antibiotics are used for Secondary bacterial infections (e.g., from scratching) but do not treat the parasitic infestation itself. This addresses a potential complication, not the primary problem.
- Option ② (Administer oral antihistamines): This manages the symptom of pruritus (itching), which is a major concern for patient comfort. However, symptom relief, while important, is secondary to implementing the definitive treatment that stops disease spread.
- Option ③ (Isolate in a private room): Watch out for confusion! Strict isolation is typically reserved for diseases spread via airborne droplets (e.g., tuberculosis, measles). For scabies, Contact Precautions (gloves, gowns for direct contact) are recommended in healthcare settings, but home isolation is impractical and unnecessary if all contacts are treated. This option overstates the isolation need.
Related Concepts: The NCLEX often tests the nurse's ability to prioritize interventions based on
Maslow's Hierarchy of Needs and
Transmission-Based Precautions. Here, preventing harm to others (safety need) takes precedence over comfort. Understanding the life cycle of the scabies mite (burrows, lays eggs) reinforces why treatment must be thorough and include all contacts.
Concept Summary
| Concept | Key Points |
|---|
| Scabies Pathophysiology | Infestation by Sarcoptes scabiei mite. Female mites burrow into the epidermis, lay eggs, causing intense allergic pruritus. Transmission via prolonged skin-to-skin contact. |
| Priority Nursing Intervention | Patient/Family education on correct scabicide use AND treatment of all household/close contacts to prevent reinfestation and community spread. |
| Key Medication | Topical Scabicide (e.g., Permethrin 5% cream). Applied from neck down, left on for 8-14 hours, then washed off. Often requires repeat application in 7 days. |
| Infection Control | Contact Precautions. Use gloves and gown for direct patient contact. Launder bedding and clothing in hot water. |
| Symptom Management | Antihistamines (e.g., diphenhydramine) for itching. Keep nails short to prevent excoriation and secondary infection. |
Side-by-Side Comparison!
| Condition | Primary Pathogen | Mode of Transmission | Key Nursing Priority |
|---|
| Scabies | Sarcoptes scabiei mite | Prolonged skin-to-skin contact, fomites (less common) | Educate on treatment of patient AND all contacts |
| Pediculosis (Lice) | Pediculus humanus capitis (head lice) | Direct head-to-head contact, sharing combs/hats | Educate on proper pediculicide use and nit removal; check household contacts |
| Impetigo | Staphylococcus aureus / Streptococcus pyogenes | Direct contact with lesions or contaminated items | Contact precautions; educate on hygiene and antibiotic use (topical/oral) |
Anatomy, Physiology & Pharmacology Points
- Skin Anatomy: The mite burrows into the Stratum corneum, the outermost layer of the epidermis.
- Immune Response: Intense itching is a Delayed hypersensitivity reaction to mites, eggs, and feces. Itching may persist for weeks after successful treatment due to this immune response.
- Pharmacology: Permethrin is a neurotoxin to insects and mites. It disrupts sodium channel function, leading to paralysis and death of the parasite.
Memory Tips
- Acronym: TREAT ALL - For Scabies, Treat the Rash, Educate on Application, and Treat ALL contacts.
- Think Community: Scabies is a "household disease." If one person has it, assume everyone in close contact is infested or at risk.
- Itch vs. Cure: Remember, antihistamines stop the itch, but only the scabicide kills the cause. The priority is to eliminate the cause.
High-Frequency NCLEX Topics
NCLEX frequently tests on
Transmission-Based Precautions and patient education for communicable conditions. For skin infestations/infections, always consider: 1) Is it contagious? 2) How is it spread? 3) What is the definitive treatment? 4) Who else needs to be treated/informed? Your priority is often the action that stops the chain of infection.
Watch Out for Question Variations!
- Shift from "Priority Intervention" to "Patient Education": "The nurse is preparing discharge instructions for a child with scabies. Which statement by the parent indicates understanding?" (Correct response would be about treating all family members).
- Shift to Medication Administration: "The nurse is teaching a parent to apply permethrin cream. Which instruction is correct?" (Focus on application from neck down, leaving on for 8-14 hours, washing off).
- Shift to Assessment: "A nurse assesses a child with suspected scabies. Which finding should the nurse expect?" (Look for burrows (thin, grayish-white lines) in finger webs, wrists, axillae; intense nocturnal pruritus).