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  Indian J Med Microbiol
 

Figure 1: (a) Biofilm formation by the tested isolates using tube method. A: Positive formation, B: Negative biofilm formation. (b) Production of biofilm by the tested isolates cultured on congo red agar. A: moderate biofilm producer (MP, brown colonies), B: Nonproducer (NP, pink colonies). (c) Screening of biofilm producers by tissue culture plate method: high, moderate, weak, and nonproducers differentiated with crystal violet staining in 96-well tissue culture plate

Figure 1: (a) Biofilm formation by the tested isolates using tube method. A: Positive formation, B: Negative biofilm formation. (b) Production of biofilm by the tested isolates cultured on congo red agar. A: moderate biofilm producer (MP, brown colonies), B: Nonproducer (NP, pink colonies). (c) Screening of biofilm producers by tissue culture plate method: high, moderate, weak, and nonproducers differentiated with crystal violet staining in 96-well tissue culture plate