Intermediate level disinfectant – Microbiology MCQ

Which of the following is an intermediate level disinfectant?
A. Glutaraldehyde
B. Quaternary ammonium compound
C. Hydrogen peroxide
D. Iodophors

Correct answer : D. Iodophors

  • Intermediate level disinfectants are chemicals which can kill microbial pathogens including mycobacteria and non enveloped virus, but not the spores.
  • Examples include alcohol, phenolic compounds and iodophors.
  • Glutaraldehyde and hydrogen peroxide are high level disinfectants.
  • Quaternary ammonium compounds are low level disinfectants.

Ref: Ananthanarayan and Paniker’s Textbook of Microbiology, 9th edition, p37.

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