الملخص

This study includes the isolation and identification of Staphylococcus aureus and Pseudomonas aerubinosa from Otitis Externa patients. Two hundred samples were collected, (191) samples showed a positive bacterial culture, this included (82) spccimwns of Ps.aeruginosa with percentage (41%) and (72) specimens of Staph. Aureus with percentage (63%). After detecting the inhibitory effect of plant extracts and active components on the bacteria under study, the results showed high inhibitory effect of aqueous and ethanolic extracts on Staph . aureus, while querctrin and catechin showed weak effect on Staph. Aureus. Ps. Aeruginosa showed resistance against aqueous, ethanolic and Quercetrin, while it showed weak sensitivity against Catechin. The Minimum Inhibitory Concentration (MIC) of aqueous extract against Staph. Aureus was (0.5) mg|cm3, while (MIC) of Catechin against Ps. AeruGinosa was (2) mg|cm3.