Which statement best describes the relationship between infectious waste and isolation waste?

• A. Infectious waste includes any waste contaminated with infectious material; isolation waste comes from isolation rooms and may be heavily contaminated.
• B. Infectious waste is only liquids; isolation waste only solids.
• C. Infectious waste and isolation waste are the same; all infectious waste comes from isolation rooms.
• D. Isolation waste is not regulated.

Answer: (A)

Infectious waste is defined by contamination with infectious material, no matter where it came from. Isolation waste, on the other hand, specifically comes from isolation rooms or the care of patients in isolation. Because patients in isolation are seen as potentially infectious, the waste from those settings is often heavily contaminated. The important relationship is that isolation waste can be infectious, but infectious waste can originate from many other places beyond isolation rooms, and not every piece of isolation waste is guaranteed to be infectious. This makes the statement describing both the broad definition of infectious waste and the source-based nature of isolation waste the most accurate.