J Clin Biomed Res, 2025 Volume 7(4): 1-8 Research Article Biochemical and Molecular Characterization of Biofilm Producing Escherichia Coli Isolated from Environmental Specimens within Ekpoma and its Environs Inyang, N.J 1 *, Emolade M.O 2 , Isibor, J.O 3 , Iyevhobu, K.O 1 , Orogu, J.O 2 , Okparaku, S.O 1 , Mike, O.I 4 , Obohwemu K.O 5 , Dongyeru E. 6 Open Access Received: June 20, 2025; Accepted: June 24, 2025; Published: July 03, 2025 Keywords: Biochemical, Molecular, Biofilm, Escherichia Coli, Environment Introduction Although practically all bacteria, if not all of them, have the capacity to create biofilms, it is debatable whether they would do so readily in an unfavourable environment. Biofilms are common in nature [1]. Gram-positive bacteria like Bacillus species, Listeria monocytogenes, and Staphylococcus species, as well as lactic acid bacteria like Lactobacillus plantarum and Lactococcus lactis, are among the many types of bacteria that can produce biofilms. Some are Gram-negative bacteria, such as Pseudomonas aeruginosa and E. coli [2]. At least three processes contribute to the creation of biofilms: recruiting cells from the bulk fluid, multiplying attached cells, and redistributing surface- attached yet motile cells. The species involved, the substrate, and the surrounding circumstances all influence these processes [1]. Numerous biological elements and hydrodynamic characteristics affect how a biofilm matures and develops a complex architecture. Cell-cell communication among the biofilm bacteria and potential bacterial cooperation or competition are examples of biological variables [3]. In order to thrive in a harsh environment, biofilms provide a protected development mode. Cells in various areas of a biofilm display distinct patterns of gene expression, and the structures that make up biofilms have specific channels that allow nutrients to flow. It is evident that when microorganisms transition from planktonic (free-swimming) creatures to cells that belong to a complex, surface-attached community, they go Journal of Clinical & Biomedical Research ISSN: 2635 - 2826 1 Department of Medical Microbiology, Faculty of Medical Laboratory Sciences, Ambrose Alli University, Ekpoma, Edo State, Nigeria. 2 Department of Microbiology, Faculty of Science, Southern Delta University, Ozoro. Delta State, Nigeria. 3 Department of Medical Microbiology, School of Basic Clinical Sciences, College of Health Science, Igbinedion University, Okada, Edo State, Nigeria. 4 Department of Microbiology, Auchi Polytechnic, Auchi, Edo State, Nigeria. 5 Faculty of Health, Wellbeing and Social Care, Oxford Brookes University, GBS Partnership, Birmingham, United Kingdom; and PENKUP Research Institute, Birmingham, United Kingdom. 6 Northwest Community Laboratories (NWCL), United States of America. *Corresponding author: Inyang NJ, Department of Medical Microbiology, Faculty of Medical Laboratory Sciences, Ambrose Alli University, Ekpoma, Edo State, Nigeria. ABSTRACT A community of bacteria that are permanently adhered to a surface and covered with extracellular polymeric substances (EPS) and have heightened resistance to host cellular and chemical reactions is referred to as a biofilm in microbiology. One or consortium of microorganisms affixed to various surfaces make up biofilms. is study analyzed the biochemical and molecular characterization of biofilm producing Escherichia coli isolated from environmental specimens within Ekpoma and its environs to separate the ambient E. coli specimens, identify the biofilm-forming capacity or capacities, and show the antibiotic resistance and biofilm-forming genes. In ambient samples, Escherichia coli was recovered with a prevalence of 112. Biofilm generation was demonstrated using two techniques: the microtitre plate method and the Congo red agar (CRA) method. is resulted in a 90% re-producibility. ere were a lot of weak formers (41.1%) among the environmental isolates (20.5%). e results of the statistical analysis indicated that there was no significant difference between the two approaches, with the p-value being 0.167369 and p≥0.05. Prior to biofilm formation, antibiotic resistance was modest (65.2%), but it increased aſter biofilm formation. Plasmid-encoded fimbriae H (fim h) and aggregation genes [(agg)3IV] for biofilm formation for strong, moderate, and weak formers alone from both isolate sources were constituted by molecular characterization test. Multidrug resistance of routinely used antibiotics in their typical routine dosages was made possible by the inclusion of plasmids for biofilm development. e existence of antibiotic resistance genes for aminoglycosides and quinolones served as additional evidence of this. ese can be investigated further with the goal of preventing the formation of biofilm by infection-associated cells. Acrydine orange (AO) dye at a concentration of 75 ul/g was used to evaluate biofilm-forming isolates for plasmid curing. e findings revealed a decrease in antibiotic resistance from 87.5% to 6.3% and biofilm development from roughly 90% to 9.9%. Plasmid-mediated antibiotic resistance is a major public health concern and a serious threat to chemotherapy and medicine worldwide.