The researchers behind the work were keen to point out that there is still little evidence to prove that the pathogens present in cannabis samples have directly led to infections in immunocompromised patients.
Reports of severe illnesses and deaths resulting from the use of synthetic cannabinoid products that have been contaminated with brodifacoum, a very long-acting anticoagulant commonly used in rat poison sparked the warning.
This is the first time that some cannabinoids have been identified in certain consumables - particularly products containing glycerin, sugar, and lactose, that can mask the presence of some cannabinoids.
As the cannabis testing sector matures, attention continues to focus on enhancing analytical quality and meeting challenging new regulatory requirements.
Preventive steps and remediative action are required to reduce the prevalence of contamination from microbes, heavy metals and, pesticides.
Pesticide testing is not currently required in Colorado but, scientists at the lab predict that it will in mandated in the coming months.
Analysis of state-wide cannabis testing data leads researchers to call for urgent action focusing on the introduction of standard cannabis testing methods.