What is the spectrum of activity?

What is the spectrum of activity?

• A. Temperature range at which a product has been tested
• B. The range of time a product should be on a surface to work effectively
• C. Specific organisms against which the product was tested
• D. Ultraviolet light range the product needs in which to be effective

Answer: (C)

Spectrum of activity is about which microorganisms the antimicrobial product is proven to affect. It describes the specific organisms—bacteria, fungi, viruses, or spores—against which the product has demonstrated effectiveness in testing. That’s why the best description is “specific organisms against which the product was tested.” It isn’t about the temperature range tested, how long the product must stay on a surface, or the UV light range required—that information relates to conditions of use or physical factors, not the range of organisms the product can act upon.

Spectrum of activity is about which microorganisms the antimicrobial product is proven to affect. It describes the specific organisms—bacteria, fungi, viruses, or spores—against which the product has demonstrated effectiveness in testing. That’s why the best description is “specific organisms against which the product was tested.” It isn’t about the temperature range tested, how long the product must stay on a surface, or the UV light range required—that information relates to conditions of use or physical factors, not the range of organisms the product can act upon.