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Potentially Hazardous Biological Agent Study Biosafety Levels (BSL)
BSL-1 - biological agents that pose low risk to personnel and the environment; highly unlikely to cause
disease in healthy laboratory workers, animals or plants
o BSL-1 research projects must be conducted in a BSL-1 or higher laboratory. This MAY be a
middle or high school science lab if it meets ALL of the standards for a BSL-1 lab (see the self-
certification form at http://www.csef.colostate.edu/Guidelines/Guidelines_BSL1.pdf).
o BSL-1 research projects must be reviewed by a Qualified Scientist/Mentor, but can be directly
supervised by a TRAINED Designated Supervisor at a verifiable BSL-1 laboratory.
o Examples of BSL-1 Organisms: Agrobacterium tumefaciens (soil bacteria), Micrococcus luteus,
Neurospora crassa (red bread mold), Bacillus subtilis (normal human gut bacteria).
o Examples of BSL-1 Studies (this is not an exhaustive list):
Studies involving naturally-occurring plant pathogens where they are not cultured or
introduced into the environment.
rDNA technology studies involving BSL-1 organisms and BSL-1 host vector systems (i.e.:
cloning of DNA in E. coli K-12, S. cerevisiae, and B. subtilis host vector systems).
Studies involving commercially available rDNA technology kits using BSL-1 organisms.
Studies of mold growth on food items where the project is NOT terminated at the first sign
of mold.
Studies involving unknown microorganisms collected from the environment as long as
ALL of the following conditions are followed:
Culturing is done in a plastic Petri dish and is SEALED.
The Petri dish remains SEALED throughout the experimentation.
The SEALED Petri dish is disposed of via autoclaving or disinfection by the
Designated Supervisor or Qualified Scientist/Mentor.
Studies involving genome editing with possible biological impact, including alteration of
germline cells.
Studies that insert antibiotic resistant markers for the clonal selection of bioengineered
organisms.
BSL-2 - biological agents that pose moderate risk to personnel and the environment; exposure in a lab
situation would result in limited risk of spreading and it would rarely cause infection that would lead to
serious disease; in the event that infection occurs, treatment and preventive measures are available
o BSL-2 research projects must be conducted in a BSL-2 or higher laboratory. This is usually a
regulated research institution, but a high school science lab MAY QUALIFY if it meets ALL of
the standards for a BSL-2 lab (see the self-certification form at
http://www.csef.colostate.edu/Guidelines/Guidelines_BSL2.pdf).
o BSL-2 research projects must be reviewed and directly supervised by a Qualified Scientist/Mentor
at a verifiable BSL-2 laboratory.
o Examples of BSL-2 Organisms: Mycobacterium (typically found in water and food sources),
Steptococcus pneumoniae (part of the normal upper respiratory tract flora), Salmonella
choleraesuis (typically found in raw food sources such as eggs and meat).
o Examples of BSL-2 Studies (this is not an exhaustive list):
Studies culturing known MRSA, VRE and KPC can only be done at a Regulated Research
Institution and must include written justification for their usage with documented IBC
review and approval.
Studies that select and subculture antibiotic-resistant organisms. Use EXTREME
CAUTION when doing this type of project.
Studies that culture human or animal waste (including sewage sludge).
Studies that insert antibiotic resistant markers for the clonal selection of bioengineered
organisms.