This study collected wound swab samples from 50 diabetic patients, especially in Wagner’s grade 2 (28) and grade 3 (22) foot ulcers. The samples were processed and subjected to bacterial isolation and characterization. The obtained diabetic foot ulcer (DFU) bacterial isolates were also subjected to antibiotic susceptibility assay. All the collected samples were culture positive and produced a total of 85 isolates. Monomicrobial and polymicrobial infections were observed from the collected grade 2 and 3 samples, respectively. Gram’s staining and morphological analyses of the obtained bacterial colony demonstrated the presence of both Gram-positive and Gram-negative bacilli, Gram-positive cocci, and Gram-negative cocco-bacilli in the wounds of diabetic patients. The bacterial profiling of 85 isolates revealed the presence of Gram-negative bacteria such as Pseudomonas aeruginosa, Escherichia coli, Proteus spp, Acinetobacter spp, Enterobacter spp, Klebsiella pneumoniae, Citrobacter spp, K oxytoca, and Stenotrophomonas spp Gram-positive bacteria such as Staphylococcus aureus, Bacillus subtilis, Enterococcus faecalis, Corynebacterium spp, and Streptococcus dysgalactiae were also identified. The predominant microbial flora found in the collected samples were Staphylococcus aureus (38%) and P aeruginosa (23.2%), followed by B subtilis (21%) and Escherichia coli (18%) and other bacteria. Furthermore, the obtained antibiotic susceptibility assay data of DFU isolates have also confirmed the distribution of multiantibiotic-resistant bacteria in the wound site of diabetic patients. The findings of the present study suggest that there is a need for the discovery of novel drug(s) to alleviate antibiotic-resistant bacterial infections in DFU patients.
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