Pseudomonas aeruginosa is considered as the epitome of an opportunistic pathogens of hospitalized patients. A total of 159 clinical specimens were recovered and molecular identified by PCR assay. The number of isolates which identified as P. aeruginosa was 101 clinical isolates. Considering the effect of 14 natural products/extracts on some virulence factors of MDR isolates, sub inhibitory concentration (½ MIC) of Syzygium aromaticum (clove) buds extract inhibit the activity of alkaline protease enzyme on skimmed milk agar. | Anti-virulence activity of selected natural products against Pseudomonas aeruginosa