Priority C (lower hazard) micro-organisms on the Domestic Substances List

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-organisms 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

Final screening assessments
Lot	Species	Strain/accession number	Final screening assessment	Final conclusion on section 64 criteria	Public comments on the draft screening assessment	Significant New Activity (SNAc) application
Not applicable	Arthrobacter globiformis	ATCC 8010	HTML	Does not meet	Not applicable	Not applicable
Not applicable	Cellulomonas biazotea	ATCC 486	HTML	Does not meet	Not applicable	Not applicable
Lot 1	Nitrobacter winogradsky	ATCC 25391	HTML	Does not meet	HTML	Not applicable
	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	Not applicable	Not applicable
Lot 2	Nitrosococcus sp.	16971-6	HTML	Does not meet	Not applicable	Not applicable

Timelines
Date	Species affected	Activity
February 24, 2018	Arthrobacter globiformis	Publication of the final screening assessment in the Canada Gazette, Part I: Vol. 152, No. 8.
February 24, 2018	Cellulomonas biazotea	Publication of the final screening assessment in the Canada Gazette, Part I: Vol. 152, No. 8.
February 18, 2017	Arthrobacter globiformis	Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 151, No. 7 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 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.
December 7, 2013	Lot 2	Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 147, No. 49 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.
January 12, 2013	Lot 1	Publication of the draft screening assessment in the Canada Gazette, Part I: Vol. 147, No. 2 and start of 60-day public comment period.