The result of a process by which pathogens are intentionally propagated is known as what?

• A. Exempt specimen
• B. Patient specimens
• C. Cultures
• D. Category B Substance

Answer: (C)

Propagating pathogens in a controlled setting is called culturing. The product that comes from this process is a culture—the growth of microorganisms on a nutrient medium. This term specifically refers to the material obtained after successful propagation. Other terms don’t describe the grown material: an exempt specimen is a regulatory category for certain samples, patient specimens are the original samples taken from patients, and a Category B Substance is a shipping/regulatory classification, not the grown material.