# During a mass casualty incident involving a suspected bioterrorism attack with anthrax exposure, which action should the nurse prioritize first when triaging patients in the emergency department?

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## 문제

During a mass casualty incident involving a suspected bioterrorism attack with anthrax exposure, which action should the nurse prioritize first when triaging patients in the emergency department?

A nurse is working in the emergency department when multiple patients arrive following a suspected bioterrorism attack involving anthrax exposure at a local government building. The patients are presenting with various symptoms including fever, cough, chest pain, and shortness of breath. The emergency department is implementing mass casualty protocols.

## 보기

1. Establish isolation precautions and decontamination procedures for all potentially exposed patients **✔ 정답**
2. Begin immediate antibiotic prophylaxis for all patients showing respiratory symptoms
3. Perform rapid diagnostic testing to confirm anthrax exposure in symptomatic patients
4. Initiate supportive care measures including oxygen therapy and IV fluid resuscitation

**정답: 1**

## 해설

In a mass casualty event involving suspected anthrax exposure from a bioterrorism attack, the nurse's highest priority is to establish isolation precautions and decontamination procedures. This is a fundamental principle of emergency preparedness and infection control, and is critical to preventing secondary contamination of healthcare workers, other patients, and the healthcare facility itself.

Anthrax is caused by Bacillus anthracis, a spore-forming bacterium that can be used as a biological weapon. In a bioterrorism scenario, anthrax is typically dispersed as an aerosol, causing inhalational anthrax, which is the most lethal form. The spores can survive on clothing, skin, and personal belongings, creating an ongoing contamination risk.

Isolation precautions include standard precautions and contact precautions for cutaneous anthrax, though person-to-person transmission is rare. More importantly, decontamination procedures must be initiated immediately to remove anthrax spores from the patient's skin, clothing, and belongings. This typically involves removing contaminated clothing, thorough washing with soap and water, and proper disposal of contaminated materials.

The decontamination process serves multiple purposes: it reduces the patient's ongoing exposure to spores, prevents contamination of the healthcare environment, protects healthcare workers from exposure, and prevents the patient from carrying spores to other areas of the hospital. Healthcare workers must use appropriate personal protective equipment (PPE), including gowns, gloves, and respiratory protection, when handling potentially contaminated patients.

While antibiotic prophylaxis, diagnostic testing, and supportive care are all important components of anthrax management, they cannot be safely and effectively implemented until proper infection control measures are in place. The CDC recommends post-exposure prophylaxis with antibiotics such as ciprofloxacin or doxycycline for 60 days after immediate decontamination.

This priority reflects the fundamental principle of emergency management that scene safety and infection control must always take precedence over patient care interventions in contamination situations. Failure to establish proper decontamination procedures could result in widespread contamination of the healthcare facility and exposure of numerous healthcare workers and patients.

## 심화 해설

Understanding the Priority: Safety and Containment in Bioterrorism

In a mass casualty incident (MCI) involving a suspected bioterrorism attack with Bacillus anthracis (anthrax), the immediate priority is not individual patient care but rather the protection of the entire facility, staff, and other patients. The principles of disaster medicine require a paradigm shift from conventional standards of care to operations where resources and safety are compromised [3]. The systematic review on triage algorithms for bioterrorism emphasizes that effective management hinges on algorithms that first address scene safety and containment to prevent a secondary incident within the healthcare facility [1].

Why Decontamination and Isolation Come First

Anthrax spores are highly resilient and can be aerosolized, posing a significant cross-contamination risk. If patients exposed to aerosolized spores enter the emergency department without decontamination, they can shed spores from their clothing and skin, turning the hospital into a secondary exposure site. The foundational nursing skill set for man-made disasters, including bioterrorism, prioritizes immediate containment and safety procedures before advanced clinical interventions [4]. Establishing isolation precautions and decontamination procedures creates a physical barrier and removes the offending agent, which is the cornerstone of the "scene safety" component of disaster response [3]. Without this step, initiating antibiotic prophylaxis or supportive care is premature and places healthcare providers at risk, potentially crippling the response capacity.

Analyzing the Other Options in the Context of Disaster Medicine

The remaining options represent critical clinical interventions, but their timing is secondary to safety and containment. The CDC guidelines for anthrax detail comprehensive treatment and post-exposure prophylaxis (PEP) regimens, including antibiotics and antitoxins, which are essential for patient survival [2]. However, these guidelines assume that the patient has been properly received and decontaminated if necessary. Beginning antibiotic prophylaxis (Option 2) or supportive care like oxygen and IV fluids (Option 4) before decontamination can expose staff during close contact and contaminate equipment. Similarly, performing rapid diagnostic testing (Option 3) is a lower priority in the immediate triage phase of an MCI. The systematic review of triage algorithms indicates that during a bioterrorism event, the initial triage is based on clinical presentation and exposure history to sort patients, not on time-consuming confirmatory tests that delay life-saving containment and treatment [1]. The CDC guidelines further note that treatment decisions, especially in a declared mass casualty event, are often empirical and based on clinical suspicion rather than waiting for diagnostic confirmation [2].

Clinical Reasoning and NCLEX-RN Application

This question tests the application of disaster triage principles, specifically the critical distinction between conventional and contingency care. The 2023 Model Core Content of Disaster Medicine explicitly states that a key competency is the ability to modify practices when resources are inadequate, focusing on actions that do the most good for the greatest number [3]. A nurse who immediately begins decontamination and isolation is applying this principle by protecting the healthcare infrastructure. The scoping review on nursing skills in disasters reinforces that for man-made events, skills in safety management, decontamination, and the use of personal protective equipment are paramount and must be executed before direct patient care activities [4]. The nurse's first action is to ensure that the arrival of contaminated patients does not create a secondary disaster within the emergency department.

References (research sources)

- [1]Triage Algorithms for Mass-Casualty Bioterrorism: A Systematic Review.Meta-analysis/systematic reviewZhao F, Zhao C, Bai S, Yao L, Zhang Y. (2023) · DOI: 10.3390/ijerph20065070

- [2]CDC Guidelines for the Prevention and Treatment of Anthrax, 2023.GuidelineBower WA, Yu Y, Person MK, Parker CM, Kennedy JL, Sue D, Hesse EM, Cook R, Bradley J, Bulitta JB, Karchmer AW, Ward RM, Cato SG, Stephens KC, Hendricks KA. (2023) · DOI: 10.15585/mmwr.rr7206a1

- [3]The 2023 Model Core Content of Disaster Medicine.Research articleWexler BJ, Schultz C, Biddinger PD, Ciottone G, Cornelius A, Fuller R, Lefort R, Milsten A, Phillips J, Nemeth I. (2023) · DOI: 10.1017/s1049023x23006556

- [4]Nursing skills required across natural and man-made disasters: A scoping review.Research articleSu Y, Wu XV, Ogawa N, Yuki M, Hu Y, Yang Y. (2022) · DOI: 10.1111/jan.15337

## 임상 시나리오

Anthrax MCI: First StepsPrioritize Containment Over Immediate Treatment
In a suspected bioterrorism attack with aerosolized anthrax, the immediate priority is scene safety and containment to prevent a secondary incident within the hospital.

Initiate isolation precautions and decontamination procedures for all potentially exposed patients before any other clinical intervention. This removes spores from skin and clothing, preventing the ED from becoming a secondary exposure zone.

CautionDo not delay decontamination for diagnostic testing or prophylaxis. Anthrax spores are resilient; acting on clinical suspicion is critical to protect staff, other patients, and the facility.

## 핵심 개념

- **Anthrax (Bacillus anthracis)** — A spore-forming bacterium that can be aerosolized for bioterrorism, causing severe respiratory illness. Spores are highly resilient and pose a significant cross-contamination risk.
- **Mass Casualty Incident (MCI)** — An event where the number and severity of casualties overwhelm available resources, requiring a shift from individual patient care to operations focused on population health and safety.
- **Decontamination** — The physical process of removing or neutralizing hazardous substances from patients, equipment, and the environment to prevent secondary exposure and contamination.
- **Isolation Precautions** — Barrier techniques (e.g., airborne, contact) implemented to prevent the transmission of infectious agents from patients to healthcare workers, other patients, and visitors.
- **Scene Safety** — The foundational disaster response step ensuring the environment is safe for responders and victims, preventing the incident from expanding or creating new hazards.

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