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.