Figure 2: Plasmid DNA profiling, of different bacterial strains, isolated from water and fish of Lake Manzala. M) λ DNA digested with Hind III, 1) Pseudomonas sp., 2) Pasturella sp;, 3) Erwinia sp.; 4) Citrobacter freundi, 5) Sphomonas paucimobilis; 6) Stentrophomonas maltophilia; 7) Stentrophomonas maltophilia; 8) Proteus mirabilis; 9) Eschericia coli; 10) Aeromonas hydrophila; 11) Aeromonas sobria