ADC Practice Question — Key IPC Terminology

What distinguishes high-level disinfection from intermediate-level disinfection?

Infection control in the ADC exam tests decision-making around exposure incidents, instrument classification, and decontamination protocols. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.

At Sunshine Dental Clinic, practice manager Priya Kumar is reviewing the infection prevention protocols with new staff member Dr. James Chen. They are discussing the appropriate reprocessing methods for different dental instruments and the limitations of various disinfection processes compared to sterilisation. What distinguishes high-level disinfection from intermediate-level disinfection?

A. High-level disinfection kills all microbial pathogens except large numbers of bacterial endospores, while intermediate-level does not kill bacterial endospores at all
B. High-level disinfection uses only thermal methods while intermediate-level uses chemical methods
C. High-level disinfection takes longer processing time than intermediate-level
D. High-level disinfection requires TGA approval while intermediate-level does not

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Sources cited

Therapeutic Guidelines v4 Odell's 3rd & 4th Ed IADT 2020 Code of Conduct CMS (Evans) Infection Control + more

Show the answer and cited explanation

Correct answer: A

High-level disinfection kills all microbial pathogens except large numbers of bacterial endospores, while intermediate level disinfection kills all microbial pathogens except bacterial endospores (ICG p.57)

Source: ICG Section 11: Disinfection

Remy's study tip — The differentiator is usually the Spaulding classification level or the step order in a protocol.

Exam preparation FAQ

How are Key IPC Terminology questions structured in the ADC written exam?

ADC Key IPC Terminology questions present as clinical vignettes requiring management decisions. The correct answer is always traceable to a guideline source.

Should I memorise guidelines word-for-word for Key IPC Terminology?

Focus on decision points — when the guideline says X vs Y. The exam tests application, not recitation.

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What distinguishes high-level disinfection from intermediate-level disinfection?

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