Certified Instrument Specialist (CIS) Practice Exam 2025 – The All-in-One Guide to Achieving Certification Success!

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Which of the following is NOT a characteristic of disinfection?

Destroys nearly all microorganisms

Effective against spores

Disinfection is primarily defined as a process that reduces the number of pathogenic microorganisms to a level that is not harmful to health, though it does not necessarily eliminate all microorganisms entirely. The key aspect to understand is that while disinfection effectively targets a broad spectrum of pathogens, it does not typically guarantee effectiveness against spores, which are resilient forms of certain bacteria.

The correct response highlights that disinfection is not typically effective against spores, as such resistant forms often require more stringent treatment methods like sterilization. On the other hand, the other characteristics of disinfection hold true: it indeed aims to destroy nearly all harmful microorganisms, involves either physical (like heat) or chemical processes (like using disinfectant solutions), and is commonly applied to inanimate surfaces to maintain infection control and hygiene.

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Involves physical or chemical processes

Used on inanimate surfaces

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