Which category of hazards includes bacteria and viruses?

• A. Mechanical
• B. Psycho-social
• C. Etiological
• D. Chemical

Answer: (C)

The correct category of hazards that includes bacteria and viruses is etiological hazards. Etiological hazards refer to biological agents that can cause illness or disease. This category encompasses a variety of infectious agents, including pathogens such as bacteria, viruses, fungi, and parasites.

Understanding this category is essential for HAZMAT training because it helps responders identify and manage potential biological risks, particularly in situations involving spills, exposure to infected materials, or outbreaks of disease. By recognizing etiological hazards, responders are better equipped to implement appropriate safety measures, such as personal protective equipment (PPE), to prevent exposure and limit the spread of infectious agents.

In contrast, the mechanical category pertains to physical hazards associated with machinery and equipment; psycho-social hazards relate to the mental and emotional aspects of a work environment; and chemical hazards are substances that can cause harm through chemical reactions but do not include biological agents like bacteria and viruses.