Priority B (medium hazard) micro-organisms on the Domestic Substances List

Priority B (medium hazard) micro-organism strains on the Domestic Substances List (DSL) were given a medium priority for assessment because while they are not specifically identified as pathogens, the Government of Canada identified evidence in the scientific literature that indicates they may have the potential to cause harm to human health or the environment. More information about the prioritization of micro-organisms on the Domestic Substances List is available. Information on all micro-organism assessments is also available.

• Applying the Significant New Activity provisions
• Summary of Priority B micro-organism strains and publications
• Timelines

Applying the Significant New Activity provisions

Potential uses of concern for strains in Priority B are addressed through the application of the Significant New Activity (SNAc) provisions. View the complete list of Significant New Activity publications under the Canadian Environmental Protection Act, 1999. For guidance on submitting information required as part of a Significant New Activity Notification (SNAN) , please see the new substances: guidelines for organisms.

Summary of Priority B micro-organism strains and publications

Final screening assessments

Species	Strain/accession number	Final screening assessment	Final conclusion on section 64 criteria	SNAc application
Bacillus amyloliquefaciens	13563-0	HTML	Does not meet	Not applicable
Bacillus atrophaeus	18250-7
Bacillus subtilis	ATCC 6051A
Bacillus subtilis	ATCC 55405
Bacillus subtilis subspecies subtilis	ATCC 6051
Bacillus species	16970-5
Bacillus species 2	18118-1
Bacillus species 7	18129-3
Bacillus circulans	ATCC 9500	HTML	Does not meet	Not applicable
Bacillus megaterium	ATCC 14581	HTML	Does not meet	Not applicable
Bacillus thuringiensis	ATCC 13367	HTML	Does not meet	Not applicable
Candida utilis	ATCC 9950	HTML	Does not meet	Not applicable
Chaetomium globosum	ATCC 6205	HTML	Does not meet	Not applicable
Micrococcus luteus	ATCC 4698	HTML	Does not meet	Not applicable
Paenibacillus polymyxa	ATCC 842	HTML	Does not meet	Not applicable
	ATCC 55407
	13540-4
Pseudomonas putida	ATCC 12633	HTML	Does not meet	HTML
	ATCC 31483
	ATCC 31800
	ATCC 700369
Pseudomonas sp.	ATCC 13867	HTML	Does not meet	Not applicable
Saccharomyces cerevisiae	F53	HTML	Does not meet	Not applicable
Trichoderma reesei	ATCC 74252	HTML	Does not meet	HTML

Timelines

Date	Species affected	Activity
August 18, 2021	Trichoderma reesei ATCC 74252	Publication in the Canada Gazette, Part II: Vol. 155, No. 17 of an order amending the DSL to apply the SNAc provisions of CEPA 1999.
May 30, 2018	Pseudomonas putida ATCC 12633, ATCC 31483, ATCC 31800, ATCC 700369	Publication in the Canada Gazette, Part II: Vol. 152, No. 11 of an order amending the DSL to apply the SNAc provisions of CEPA 1999.
March 3, 2018	Bacillus thuringiensis ATCC 13367	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 9.
February 24, 2018	Trichoderma reesei ATCC 74252	Publication in the Canada Gazette, Part I: Vol. 152, No. 8 of a notice of intent to amend the DSL to apply the SNAc provisions of CEPA 1999, and start of 60-day public comment period.
February 24, 2018	Trichoderma reesei ATCC 74252	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 8.
February 24, 2018	Bacillus circulans ATCC 9500	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 8.
February 24, 2018	Bacillus megaterium ATCC 14581	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 8.
February 24, 2018	Chaetomium globosum ATCC 6205	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 8.
February 24, 2018	Micrococcus luteus ATCC 4698	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 152, No. 8.
April 29, 2017	Bacillus thuringiensis ATCC 13367	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 17.
February 4, 2017	Trichoderma reesei ATCC 74252	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 5.
January 21, 2017	Pseudomonas putida ATCC 12633, ATCC 31483, ATCC 31800, ATCC 700369	Publication in the Canada Gazette, Part I: Vol. 151, No. 3 of a notice of intent to amend the DSL to apply the SNAc provisions of CEPA 1999, and start of 60-day public comment period.
January 21, 2017	Saccharomyces cerevisiae F53	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
January 21, 2017	Pseudomonas putida ATCC 12633, ATCC 31483, ATCC 31800, ATCC 700369	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
January 21, 2017	Bacillus circulans ATCC 9500	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
January 21, 2017	Bacillus megaterium ATCC 14581	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
January 21, 2017	Chaetomium globosum ATCC 6205	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
January 21, 2017	Micrococcus luteus ATCC 4698	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 151, No. 3.
May 28, 2016	Candida utilis ATCC 9950	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 150, No. 22.
May 28, 2016	Pseudomonas sp. ATCC 13867	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 150, No. 22.
April 9, 2016	Saccharomyces cerevisiae F53	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 150, No. 15.
March 19, 2016	Pseudomonas putida ATCC 12633, ATCC 31483, ATCC 31800, ATCC 700369	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 150, No. 12.
August 1, 2015	Paenibacillus polymyxa ATCC 842, ATCC 55407, 13540-4	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 149, No. 31.
August 1, 2015	Bacillus amyloliquefaciens 13563-0, Bacillus atrophaeus 18250-7, Bacillus subtilis ATCC 6051A, Bacillus subtilis ATCC 55405, Bacillus subtilis subspecies subtilis ATCC 6051, Bacillus species 16970-5, Bacillus species 2 18118-1, Bacillus species 7 18129-3	Publication of the final screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 149, No. 31. This final screening assessment also applies to some Priority A micro-organisms included in the DSL Bacillus licheniformis/subtilis group.
May 23, 2015	Candida utilis ATCC 9950	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 149, No. 21.
May 23, 2015	Pseudomonas species ATCC 13867	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 149, No. 21.
January 17, 2015	Paenibacillus polymyxa ATCC 842, ATCC 55407, 13540-4	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 149 No. 3.
November 29, 2014	Bacillus amyloliquefaciens 13563-0, Bacillus atrophaeus 18250-7, Bacillus subtilis ATCC 6051A, Bacillus subtilis ATCC 55405, Bacillus subtilis subspecies subtilis ATCC 6051, Bacillus species 16970-5, Bacillus species 2 18118-1, Bacillus species 7 18129-3	Publication and start of 60-day public comment period on the draft screening assessment. The related notice was published in the Canada Gazette, Part I: Vol. 148, No. 48. This draft screening assessment also applies to some Priority A micro-organisms included in the DSL Bacillus licheniformis/subtilis group.