| Summary: | Biofilms are the cause of major bacteriological infections in patients. The complex architecture of <i>Escherichia coli</i> (<i>E. coli</i>) biofilm attached to the surface of catheters has been studied and found to depend on the biomaterial’s surface properties. The SEM micrographs and water contact angle analysis have revealed that the nature of the surface affects the growth and extent of <i>E. coli</i> biofilm formation. In vitro studies have revealed that the Gram-negative <i>E. coli</i> adherence to implanted biomaterials takes place in accordance with hydrophobicity, i.e., latex > silicone > polyurethane > stainless steel. Permanent removal of <i>E. coli</i> biofilm requires 50 to 200 times more gentamicin sulfate (G-S) than the minimum inhibitory concentration (MIC) to remove 90% of <i>E. coli</i> biofilm (MBIC<sub>90</sub>). Here, in vitro eradication of biofilm-associated infection on biomaterials has been done by Eudragit RL100 encapsulated gentamicin sulfate (E-G-S) nanoparticle of range 140 nm. It is 10−20 times more effective against <i>E. coli</i> biofilm-associated infections eradication than normal unentrapped G-S. Thus, Eudragit RL100 mediated drug delivery system provides a promising way to reduce the cost of treatment with a higher drug therapeutic index.
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