Study the resistance of bacterial and fungal isolates which identified previously towards different antibiotics that have been recommended for treating those patients. It was found that higher percentage of resistance to penicillin, gentamycin, tetracyclin, chlormphenicol, and trimethoprim- sulfmethazxol then moderate resistance to ampcillin, nalidixic acid, cephotaxime, streptomycin, cephalexin, rifampicin and less resistance to ciprofloxacin that represent the most effective antibiotic against uropathogenic bacteria. Ketazole antibiotic was used against yeasts, which the minimum inhibitory concentration of ketazole against 83% of Candida. albicans isolates was 128 μg/ml, the rest of the isolates was 64 μg/ml. Isolation of bacterial and yeasts DNA (chromosome + plasmids), results of DNA isolation showed that bacterial isolates (E.coli (RS1), proteus. mirabilis (RS2), klebsiella. pneumonia (RS3) and Pseudomonas. aeruginosa (RS4) have chromosome and plasmids vary in numbers and size according to isolate. While yeast (C13) isolate have only chromosome without plasmid.A result of curring shows that:-Resistance to ampicillin, tetracycline, gentamycin, pencillin for all bacterial isolates carried on plasmid.- Resistance to cephalexin by RS1 isolate, resistance to cephotaxim by RS3 isolate and resistance to chlormphnicol by RS4 isolate carried on plasmid, while resistance to other antibiotics were carried on chromosome.

This study includes isolation and identification of different uropathogenes (bacteria- yeasts) collected from catheterized patients suffering from complicated urinary tract infections. Three hundred and fifty urine samples obtained by swabs from catheterized patients were identified for the presence of uropathogenes (bacteria and yeast). 221(63.13%) samples were obtained from females and 118 (33.71%) samples from male, 339(96.85%) sample were identified by culturing as a positive result, while 11(3.14%) sample were negative result. The 339 positive isolates include 303 (89.38%) bacterial isolates and 36 (10.61%) yeast isolates. Results of biochemical tests and Api 20 system for bacterial and yeast isolates reveals E.coli, Proteus spp, Klebseilla spp, Pseudomonas spp and Candida spp represented the main causative uropathogen infect urinary system and causing a complicated type of infection. The determination of bacterial and yeasts ability to form biofilm was carried out using test tube method , 306 isolates which represented (90.26%) were capable to form biofilm with differ in the thickness of formed layer. Pseudomonas spp formed the thicker biofilm followed by E.coli, Candida spp, Proteus spp, and Klebseilla spp.