Abstract

Antibacterial effects of phenolic extracts of three medical plants: Plantago lanceolota(Pl.); Convolvulus arvensis(Ca.) and Euphorbia granulate(Eg.) leaves, in different concentrations (5mg/ml, 10mg/ml and 20mg/ml) were carried out as a part of search for new antibacterial substance against important human pathogens. Antibacterial activities were carried out against four human pathogens, two Gram positive bacteria: Bacillus subtilis; Staphylococcus aureus and two Gram negative bacteria: Pseudomonas aeroginosa; Klebsiella pneumonia. By the standard procedures the zone of inhibition of the extract was compared with different standard antibiotic drugs like: Oxytetracycline, Streptomycin, Gentamycine, chloromphenicol and Ciprofloxacin. Observed results showed that phenolic extracted from three plants in a different concentrations possess effective antibacterial against all tested organisms.

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