Microbial Screening

Microbial screening refers to laboratory testing protocols that identify and quantify microorganisms (bacteria, fungi, molds) present in cannabis plant material or final products. These assessments measure contamination levels against regulatory thresholds, commonly including tests for pathogens like E. coli, Salmonella, and total aerobic microbial count. Microbial screening is a post-harvest quality control practice rather than a genetic trait, but breeding programs increasingly incorporate disease resistance traits to reduce pathogenic load in living plants. Understanding microbial risk informs both cultivation hygiene standards and seed-selection strategies for disease-resistant cultivars.

Breeders working toward disease-resistant genetics select parent plants demonstrating natural resistance to common fungal and bacterial infections, which can reduce microbial contamination risk before harvest. Lineage records from breeding programs often note resistance to powdery mildew, botrytis, and root-rot pathogens as complementary traits to lower overall microbial burden in finished materia