What are the two characteristics of medical waste that are used to determine if the waste material is considered infectious?

• A. Virulence and quantity
• B. Availability of antidotes and immunizations
• C. Growth in cell culture and genomic profile
• D. Animal source and transmissibility

Answer: (A)

The risk that medical waste poses as infectious hinges on whether viable pathogens capable of causing disease are present. The two factors that drive that risk are a pathogen’s virulence—how capable it is of causing illness—and the amount of the organism present, i.e., the infectious dose. If the waste contains a highly virulent agent and enough organisms, the potential to cause infection is high, so it’s classified as infectious and must be handled with proper containment. If the organisms are inactivated or present in very small numbers, the infection risk is much lower, even if a pathogen type is present. Other ideas like antidotes or immunizations, growth in culture, genomic profile, animal origin, or general transmissibility don’t by themselves determine whether waste is infectious.