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Assay of chitinolytic activity on plates with SM agar medium supplemented with colloidal chitin (0.2% [wt/vol]). Clearing zones of colloidal chitin formed around the colonies of C. violaceum strains CVWT (1) and CV017 (2). Strains E. agglomerans IC1270 (3) and 40b (4) were seeded on the plate as positive and negative controls, respectively. The plate was incubated at 28°C for 4 days.
