Biochemical and Molecular Characterization of Biofilm Producing Escherichia Coli Isolated from Environmental Specimens within Ekpoma and its Environs
Author(s):
Inyang, N.J1*, Emolade M.O2, Isibor, J.O3, Iyevhobu, K.O1, Orogu, J.O2, Okparaku, S.O1, Mike, O.I4, Obohwemu K.O5, Dongyeru E.6,
Anozie, A.J2
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. This 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. This resulted in a 90% re-producibility. There were a lot of weak formers
(41.1%) among the environmental isolates (20.5%). The 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 after 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. The existence of antibiotic resistance genes for aminoglycosides and quinolones
served as additional evidence of this. These 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. The 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.
