Micro-organisms are broadly defined as bacteria, fungi, yeasts, protozoa, algae, viruses, eukaryotic cell culture, and any culture other than a pure culture. As with chemicals, new and existing micro-organisms must undergo a screening assessment under the Canadian Environmental Protection Act, 1999 (CEPA 1999) to determine whether they can cause harm to human health or the environment.
As part of the Chemicals Management Plan, the 68 micro-organism strains on the Domestic Substances List (DSL) will be assessed. The Government of Canada used known hazard characteristics to rank the micro-organism strains into groups that determine their priority for assessment. The criteria used to rank the micro-organism strains are described in the Prioritization of Micro-organism Strains on the Domestic Substances List.
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