Klebsiella pneumoniae is an adaptable pathogen that forms biofilms on a variety of surfaces. This study's objective was to identify the presence of fimbrial genes (types 1 and 3) in K. pneumoniae strains isolated from various clinical sources based on their antibiotic resistance and ability to form biofilms. According to identification utilizing the vitek 2 technology and confirmation by molecular identification targeting the 16S rRNA gene with a particular primer, forty isolates were identified from clinical specimens. The vitek 2 compact system was utilized to evaluate the antibiotic susceptibility of all the isolates. The findings revealed a range of resistance percentages, including 52.5% for Penicillin, 40.5% for Trimethoprim/Sulfamethoxazole, 34.5% for Cephalosporins, 6.25 % for Fluoroquinolones, and 2.5% for each of Carbapenem, Aminoglycoside, Tetracycline, and Nitrofurantoin. The 96-well microtiter plate technique was utilized to generate biofilms. The results demonstrated that all 40 Klebsiella pneumoniae isolates (100%) produced potent biofilms. In order to identify the genes involved in biofilm formation (fimh & mrkd) and the genes responsible for adhesin in type 1& type 3 fimbriae using traditional PCR method, eleven isolates were chosen for molecular analysis that are powerful biofilm makers and MDR.
