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Difficulty: Very hardStandard and Transmission-Based Precautions

Review the clinical profiles of the following five clients. Evaluate the infectious agent, phase of illness, and presenting symptoms to select the most appropriate transmission-based precaution category for each client.

  • A young adult with bacterial meningitis (Neisseria meningitidis) who has received targeted intravenous ceftriaxone therapy for 36 hours.Standard Precautions only
  • An adolescent with a paroxysmal cough and post-tussive emesis, suspected of having Bordetella pertussis.Standard and Droplet Precautions
  • An older adult with a widespread vesicular rash crossing multiple dermatomes, diagnosed with disseminated herpes zoster.Standard, Contact, and Airborne Precautions
  • An adult newly admitted with frequent, severe watery diarrhea following prolonged broad-spectrum antibiotic use, awaiting stool assay results.Standard and Contact Precautions
  • A pediatric client admitted with severe viral pneumonia and bilateral conjunctivitis, with laboratory-confirmed adenovirus.Standard, Contact, and Droplet Precautions

Answer

Correct matches: Meningitis at 36 hours requires Standard Precautions only. Suspected Pertussis requires Standard and Droplet Precautions. Disseminated Herpes Zoster requires Standard, Contact, and Airborne Precautions. Suspected C. difficile requires Standard and Contact Precautions. Adenovirus requires Standard, Contact, and Droplet Precautions.
Each correct pairing reflects advanced application of CDC isolation guidelines. It tests the ability to move beyond simple pathogen memorization by factoring in the phase of treatment (e.g., discontinuation after 24 hours of antibiotics for meningococcal disease), the extent of the disease (disseminated versus localized zoster), the critical necessity of empiric isolation (suspected C. diff), and pathogens requiring multiple simultaneous transmission-based precautions (adenovirus).

Step-by-Step Solution

1
Analyze the duration of therapy for the client with Neisseria meningitidis.
Determine that 36 hours exceeds the 24-hour requirement for droplet precautions.
Droplet precautions can be safely discontinued after 24 hours of effective antimicrobial therapy, reverting to standard precautions.
2
Evaluate the isolation requirements for suspected Bordetella pertussis.
Select standard and droplet precautions.
Pertussis is highly contagious and transmitted via large respiratory droplets during coughing fits.
3
Assess the presentation of herpes zoster (shingles) in the older adult.
Identify the infection as disseminated (crossing multiple dermatomes) and select airborne and contact precautions.
While localized zoster in an immunocompetent adult may only require standard precautions if lesions are covered, disseminated zoster requires strict airborne and contact isolation.
4
Determine the priority intervention for the client with acute, severe diarrhea and a history of antibiotic use.
Initiate empiric standard and contact precautions immediately.
Infection control protocols dictate that contact precautions for suspected C. difficile must be implemented prior to laboratory confirmation to prevent widespread unit outbreaks.
5
Identify the specific transmission routes for adenovirus respiratory infections.
Select a combination of standard, contact, and droplet precautions.
Adenovirus is highly resilient on environmental surfaces and spreads via both respiratory droplets and direct or indirect contact with fomites.

Key Concept

Advanced Application of Transmission-Based Precautions: Duration, Empiric Isolation, and Combined Routes
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Topics

Standard and Transmission-Based Precautions

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