ANTI-BACTERIAL ACTIVITY OF ESSENTIAL OIL OF THE FLOWERING TOPS OF Rosmarinus officinalis L., FROM TÉBESSA (ALGERIA)

Abstract

ABSTRACT. The objective assigned to the present study is the evaluation of the antibacterial activity of essential oil of the flowering tops of Rosmarinus officinalis L., from Tébessa (Algeria). The antibacterial activity of the essential oil is carried out by the diffusion method on agar medium vis-à-vis eighteen bacterial strains, chosen according to the traditional use of this species in Algeria: Escherichia coli (ATCC22), Escherichia coli (BLSE), Escherichia coli (ciproR), Escherichia coli (mcr1),  Klebsiella pneumoniae (C+), Klebsiella pneumoniae (C-),  Salmonella sp, Enterobacter cloacae (FOSR1), Bacillus cereus, Pseudomonas aeruginosa (ATCC53), Pseudomonas aeruginosa (VIM21), Acinetobacter (OXA23), Acinetobacter (NDM1), Staphylococcus aureus (13), Staphylococcus aureus (23), Staphylococcus aureus (23), Enterococcus faecalis (ATCC12), Sphingomonas sp. Staphylococcus aureus (23) was the most sensitive species followed by Pseudomonas aeruginosa (ATCC53) and Acinetobacter (NDM1). Significant sensitivity was observed for the Escherichia coli (BLSE), Salmonella sp and Sphingomonas sp. However, Bacillus cereus was the most resistant to the essential oil tested.