Week 3: Bioterrorism and Disaster Management

Disasters and Classifications

• A natural or man-made event causing destruction or emotional trauma that exceeds local response capacity without community aid.

• Classifications:

  • Natural Disasters: Driven by environmental or earthly processes.

  • Man-Made Disasters: Caused by human actions, technological failures, or hazards.

Key Characteristics of Disasters

• Complex Emergency: Multifaceted crisis involving authority breakdown from conflict.

• Casualty: An individual injured or killed in a disaster.

• Mass Casualty: Involves 100 or more casualties.

• Scope: Geographic or human range of impact.

• Intensity: Overall severity of destruction.

Types of Disaster Hazards

• Natural: Earthquakes, floods, hurricanes, tsunamis, volcanic eruptions.

• Man-Made: Industrial accidents, explosions, transport crashes, oil spills, radiation, war, terrorism, and global warming.

Impacted Populations

• Directly Impacted: Individuals experiencing physical or psychological effects firsthand.

• Displaced Persons: Individuals forced to leave home due to disaster severity.

• Refugees: Individuals fleeing their homeland due to war, persecution, or conflict.

• Indirectly Impacted: Friends, relatives, or associates of direct victims.

Phase 1 of Disaster Management (Prevent/Mitigation)

• Goal: Prevent hazards or diminish prospective impact.

• Actions: Hazard/vulnerability assessments, profiling vulnerable populations, public education, and infrastructure reinforcement.

Phase 2 of Disaster Management (Preparedness)

• Goal: Build operational readiness across national, state, local, professional, and personal levels.

• Actions: Creating emergency response plans, siren protocols, designated evacuation routes, and response drills.

Phase 3 of Disaster Management (Response)

• Goal: Execute immediate actions to save lives and preserve property.

• Actions: Rescue operations, incident stabilization, mass care, and emergency shelter management.

Phase 4 of Disaster Management (Recovery)

• Goal: Restore normal community function and infrastructure.

• Actions: Rebuilding, economic restoration, debris and sanitation management (monitoring disease outbreaks), restoring healthcare services, and managing PTSD via debriefing.

Emergency Preparedness Standards

Personal & Family Preparedness: Family care plans, evacuation meet-up points, and a personal readiness supply kit (3–7 days of essential supplies).

Joint Commission Standards: Requires staff assignment protocols, external agency notification, scene decontamination procedures, evacuation plans, and clinical record preservation.

Disaster Drills and Management: Routine internal and external response plan testing using tabletop exercises or simulations with or without moulage.

Hospital Incident Command System (HICS): Structured organizational model providing clear authority lines and standardized Job Action Sheets.

Emergency Operations Center (EOC): Centralized hub equipped with communications technology to direct disaster operations.

Hospital Disaster Response

Hospital Operational Phases: Command Post Activation, Alert Phase, Response Phase, and Expanded Response Phase.

Capacity Creation via Inpatient Discharge Protocols

• Prioritized bed clearance sequence:

  1. Utilize empty beds first.

  2. Cancel routine admissions and elective procedures.

  3. Discharge non-bedridden observation patients.

  4. Discharge inpatients near clinical discharge.

  5. Discharge stable postpartum mothers and infants after 24 hours.

Disaster Response Agencies

Federal Disaster Response Plan (FRP): Deploys federal assets when disaster severity exceeds local and state capacities.

Primary Organizations

• FEMA: Coordinates federal relief efforts.

• DHS: Directs national security and preparedness.

• American Red Cross (ARC): Non-governmental agency handling shelter and mass care.

• USPHS & CDC: Provide medical personnel, disease containment, and health surveillance.

• OEM & Local Entities: Manage local emergency planning, police, and National Guard response.

Triage Principle

Do the greatest good for the greatest number by prioritizing patients with high survival probabilities under resource scarcity.

Simple Triage and Rapid Treatment (START)

• Time Window: Maximum 30 seconds per patient.

• Assessment (RPM): Respirations, Perfusion, Mental Status.

• Intervention Limits: Assessment only, with strictly two allowed actions: clearing the airway and controlling major external hemorrhage.

• Pediatric Adaptation: JumpSTART model.

NATO Triage Categories

• Red (Emergent - Class I): Immediate life-threatening injuries with high survival probability if stabilized (e.g., airway obstruction, severe shock/bleeding).

• Yellow (Urgent - Class II): Major injuries that can safely delay care for 45–60 minutes (e.g., open fractures, abdominal trauma).

• Green (Non-Urgent - Class III): Minor injuries capable of waiting several hours (e.g., sprains, minor lacerations, burns <20% BSA).

• Black (Expectant - Class IV): Deceased or non-salvageable individuals given comfort care only (e.g., severe head trauma with GCS <8, burns >85% BSA).

Triage Tags and Documentation

Color-coded barcoded tags track vitals and property.

Patients meeting Red criteria are tagged immediately before moving to the next individual.

Bioterrorism Threats

Fundamentals: Deliberate use of pathogens or toxins (CBRN/NBC) via inhalation, droplet, ingestion, cutaneous, or blood routes.

Nuclear and Radiological Protection: Sheltering indoors within interior, windowless rooms and sealing doors/vents with plastic sheeting and duct tape upon notification.

Categorization of Biological Agents

• Category A: Highest priority; high mortality and public health impact (Anthrax, Botulism, Plague, Smallpox, Tularemia, Ebola).

• Category B: Second priority; moderate dissemination, high morbidity, low mortality (Ricin, West Nile, Typhus, Cholera).

• Category C: Third priority; emerging pathogens engineered for potential mass dissemination (Hantavirus, Nipah, Rabies, Influenza, TB).

Anthrax (Specific Biological Agents)

(Bacillus anthracis): Spore-forming bacterium.

• Cutaneous: Black necrotic eschar (2–6 days); treated with oral Ciprofloxacin.

• Inhalational: Rapid onset flu-like symptoms progressing to dyspnea and septic shock (100% mortality untreated). Prophylaxis requires oral Ciprofloxacin or Doxycycline plus vaccination.

Other Specific Biological Agents

• Smallpox (Variola Virus): Highly contagious via contact/airborne routes; causes high fever and deep pustular rash; vaccine effective within 3 days of exposure.

• Botulism (Clostridium botulinum): Neurotoxin causing descending muscle paralysis and respiratory failure; treated with antitoxin and mechanical ventilation.

• Ebola Virus: Contact with bodily fluids; causes systemic hemorrhage and hypovolemic shock; managed with strict isolation, PPE, supportive care, and vaccine (2019).

• Plague (Yersinia pestis): Flea/rodent vector; pneumonic (droplet isolation), bubonic (buboes), septicemic (DIC/gangrene); treated with Gentamicin or Fluoroquinolones.

• Tularemia (Francisella tularensis): Zoonotic transmission; causes fever, dry cough, and pneumonia; treated with Streptomycin/Gentamicin (oral Ciprofloxacin/Doxycycline in mass casualties).

Profiles of Toxic Chemical Agents

• Cyanide: Inhibits cellular oxygen use; leaves bitter almond odor; treated with Amyl Nitrite / Sodium Thiosulfate.

• Sarin Gas: Organophosphate nerve agent causing cholinergic crisis within 2 minutes; treated with Atropine and Pralidoxime (2-PAM).

• Vesicants (Mustard Gas/Phosgene Oxime): Garlic odor; causes severe blistering and airway inflammation; treated by disrobing and water decontamination.

• Ricin: Castor bean toxin causing severe GI distress (ingestion) or pulmonary edema (inhalation); treated with supportive care and GI charcoal lavage.

Prevention Levels/Roles for Disasters

• Primary Prevention: Developing disaster plans, conducting threat assessments, public education, and stockpiling medical supplies.

• Secondary Prevention: Performing START triage, providing immediate life-saving care, shelter supervision, and exposure tracking.

• Tertiary Prevention: Long-term rehabilitation, PTSD screening, Critical Incident Stress Debriefing (CISD), and post-disaster protocol reviews.

Legal, Ethical, and Regulatory Considerations

• Jurisdictional Framework: Stafford Act (1988) governs federal disaster assistance; states maintain public health police powers.

• Key Issues: Disease reporting vs. privacy, mandatory quarantine/isolation, compulsory vaccination, emergency cross-state licensing, resource allocation, and Good Samaritan protections.