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Antibacterial activity of Xanthium strumarium leaf extracts against methicillin-resistant Staphylococcus aureus (MRSA) standard (ATTC 25923) and the clinical isolate MRSA (n = 20) mea-sured as diameter of the zone of inhibition (mm). Different letters indi-cate significant differences according to the least significant difference test at P < 0.05. All results are expressed as mean ± standard deviation
