Phenotypic and genotypic characterization of linezolid resistance and the effect of antibiotic combinations on methicillin-resistant Staphylococcus aureus clinical isolates

Table 3 Biofilm formation quantification of LR-MRSA isolates by crystal violet staining microtiter plate method, Mean optical density (OD) ± standard error of mean (SEM), in correlation with their linezolid MIC values

Isolate Code	Mean optical density (OD) ± SEM	Categorization	Linezolid MICs (mg/L)
9A	7.69 ± 0.108	Strong biofilm producer	128
57A	4.95 ± 0.024	Strong biofilm producer	32
90A	6.98 ± 0.093	Strong biofilm producer	128
95A	3.8 ± 0.074	Strong biofilm producer	8
112A	6.94 ± 0.312	Strong biofilm producer	64
117A	7.32 ± 0.421	Strong biofilm producer	128
126A	2.5 ± 0.073	Moderate biofilm producer	8
137A	2.81 ± 0.053	Moderate biofilm producer	16

ISSN: 1476-0711