Blood-borne pathogens are?

• A. Bacteria found in soil
• B. Airborne viruses
• C. Water microorganisms
• D. Microorganisms present in human blood and can cause diseases

Answer: (D)

Blood-borne pathogens are microorganisms present in human blood that can cause disease. This includes viruses such as HIV, hepatitis B, and hepatitis C, which can be transmitted through contact with infected blood or certain body fluids. The important point is that these agents reside in human blood and pose a risk of illness if exposure occurs, typically through sharps injuries, contaminated surfaces, or open wounds. This is distinct from organisms found in soil, in the air, or in water, which are not classified as blood-borne pathogens. Understanding this helps emphasize the need for proper handling of blood and body fluids, use of protective equipment, and safe needle practices to prevent occupational exposure.