Qualitative cellulolytic assay of bacterial isolates. Solid agar plates containing a saline minimal medium supplemented with (A) bagasse, (B) harvest trash (HT) and (C) carboxymethyl cellulose (CMC) as sole carbon sources. Bacteria were let to grow for 15 days at 30°C before treatment with Congo red. Halos around bacterial colonies are indicative of cellulose degradation. Bacteria abbreviations: E = Enterococcus casseliflavus strain Kd7 TUC-EEAOC, K = Klebsiella oxytoca strain Kd70 TUC-EEAOC and B = Bacillus pumilus strain Kd109 TUC-EEAOC, S = Stenotrophomonas maltophilia Kd3 TUC-EEAOC, M = Microbacterium hominis KdL49 TUC-EEAOC and Ec = Escherichia coli DH5α as a negative control.