Infection Control · single question
A disinfectant's level of efficacy (e.g., intermediate-level/tuberculocidal) is judged by its ability to kill which reference organism?
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Correct answer: A. Mycobacterium tuberculosis
- A. Correct. The ability to kill Mycobacterium tuberculosis defines a tuberculocidal (intermediate-level) disinfectant—M. tuberculosis is relatively resistant and a key benchmark.
- B. S. mutans is an easily killed oral organism, not the benchmark.
- C. Lactobacillus is not the standard resistance benchmark.
- D. E. coli is a common, non-resistant test organism, not the tuberculocidal benchmark.
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