Virucidals are disinfectants used to kill which of the following?

• A. Viruses
• B. Tuberculosis
• C. Pseudomonas
• D. Harmful bacteria

Answer: (A)

Virucidal disinfectants are designed to inactivate viruses on surfaces and tools, preventing them from infecting clients or staff. They work by disrupting the virus’s envelope or capsid or its genetic material, so the virus can no longer enter cells or replicate. That’s why this option is the best choice: virucidal products specifically target viruses.

Other terms refer to different organisms or scopes. Tuberculocidal disinfectants kill the bacteria that cause tuberculosis, which is a specific organism and not a virus. Pseudomonas is a type of bacteria, not a virus, so a disinfectant aimed at bacteria wouldn’t be described as virucidal. “Harmful bacteria” is a vague category; many disinfectants are bactericidal, but virucidal denotes activity against viruses, not bacteria.