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Priority C (Lower Hazard) Micro-organisms

Priority C (lower hazard) micro-organism strains on the Domestic Substances List (DSL) were identified for expedited assessment based on their meeting the criteria for lower potential to cause harm to human health or the environment as described in Prioritization of Micro-organism Strains on the Domestic Substances List. Evidence of significant hazard during the screening assessment would result in the micro-organism strain being removed from Priority C and reprioritized for further assessment. To learn more, view the Assessment Approach for Priority C (Lower Hazard) Micro-Organisms on the Domestic Substances List. Information on all Micro-organism assessments is also available.

Summary of Priority C Micro-organism Strains and Publications

Draft Screening Assessments
Species Strain/Accession Number Draft Screening Assessment Proposed conclusion on Section 64 criteria Significant New Activity (SNAc) Application
Arthrobacter globiformis ATCC 8010 HTML Does not meet Not applicable
Cellulomonas biazotea ATCC 486 HTML Does not meet Not applicable
Final Screening Assessments
Lot Species Strain/Accession Number Final Screening Assessment Final conclusion on Section 64 criteria Public Comments on the Draft Screening Assessment
Lot 1 Nitrobacter winogradsky ATCC 25391 HTML Does not meet HTML
Nitrobacter species 18132-6
Nitrobacter species 16969-4
Nitrosomonas europaea ATCC 25978
Nitrosomonas species 16968-3
Nitrosomonas species 18133-7
Rhodopseudomonas palustris ATCC 17001
Rhodospseudomonas species 18136-1
Lot 2 Nitrococcus sp. 16972-7 HTML Does not meet N/A
Nitrosococcus sp. 16971-6
Timelines
Date Species Affected Activity
February 18, 2017 Arthrobacter globiformis Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 151, No.7 - February 18, 2017 and start of 60-day public comment period.
February 18, 2017 Cellulomonas biazotea Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 151, No.7 - February 18, 2017 and start of 60-day public comment period.
February 14, 2015 Lot 2 Publication of the final screening assessment in the Canada Gazette, Part I: Vol. 149, No. 7 - February 14, 2015.
December 7, 2013 Lot 2 Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 147, No.49 - December 7, 2013 and start of 60-day public comment period.
December 7, 2013 Lot 1 Publication of the final screening assessment in the Canada Gazette, Part I: Vol. 147, No. 49 - December 7, 2013.
January 12, 2013 Lot 1 Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 147, No. 2 - January 12, 2013 and start of 60-day public comment period.