Which statement about disinfection methods is accurate?

Which statement about disinfection methods is accurate?

• A. Disinfection can be achieved with heat above 210F only.
• B. Disinfection can be achieved with chemicals or hot water at 180F.
• C. Disinfection requires UV light only.
• D. Disinfection can be achieved using heat above 200F and without chemicals.

Answer: (D)

Disinfection means lowering the microbial load on surfaces to safe levels, and you can achieve it by different methods: heat, chemicals, or UV light. Using heat alone at temperatures above about 200F can disinfect surfaces without chemicals, given enough exposure time. This makes the statement accurate because it reflects that heat, by itself, can be effective for disinfection without adding chemical agents. The other ideas are limited or incomplete. Some methods rely on chemicals or UV, and sanitizing temperatures around 180F are typically considered sanitization rather than disinfection. Heating above 210F is not the only way to disinfect, and UV is not the sole method.

Disinfection means lowering the microbial load on surfaces to safe levels, and you can achieve it by different methods: heat, chemicals, or UV light. Using heat alone at temperatures above about 200F can disinfect surfaces without chemicals, given enough exposure time. This makes the statement accurate because it reflects that heat, by itself, can be effective for disinfection without adding chemical agents.

The other ideas are limited or incomplete. Some methods rely on chemicals or UV, and sanitizing temperatures around 180F are typically considered sanitization rather than disinfection. Heating above 210F is not the only way to disinfect, and UV is not the sole method.