The botanic genera Pistacia are groups around een species of shrubs that belong to the Anacardiaceae family which is believed to have originated in Asian or Mediterranean region. P. len scus is abundant species of the Pistacia genus encountered in the forest region of Ouarsenis mount (Northwest of Algeria), exactly in the na onal park of Thniet El Had in the Wilaya of Tissemsilt in Algeria. In the present study, chemical composi on and an bac- terial ac vi es of essential oil (EO) of P. lentiscus were evaluated. The EO was isolated and analyzed by gas chromatography-mass spectrometry (GC- MS). The minimum inhibitory concentra on (MIC) was determined using 6 strains of Gram-positive and negative bacteria. The antibiogram was made following the gliosis-environment diffusion method and which makes it possible to determinate bacteria’s sensibility to an bio cs. From a exponential culture (18 to 24 hours), a bacterial suspension was prepared and well- homogenized a erwards. The opacity was adjusted equivalent to 0.5 McF (McFarland). Based on the GC-MS analysis, thirty five compounds representing 100 % of the total oil composi on were iden ed. The essen al oils could be explored to test their an microbial activity, especially against some bacteria that cause alimentary intoxications. The results revealed that the essen al oil exhibited strong levels of an bacterial activity against the tested microorganism regarding the MIC values, Salmonella sp was found to be the most sensitive strain (inhibition zone 23cm MIC 1.25%). Based on the findings of the present study, new an bacterial agents could be developed, and the use of P. lentiscus should be promoted in the traditional treatment of ailments.
The botanic genre Pistacia is a group of around fifteen species of shrubs that belong to the Anacardiaceae family native to Asia and the Mediterranean. Pistacia lentiscus is an abundant species of the Pistacia genre encountered in the forest region of the Ouarsenis mountain range (Northwest of Algeria), specifically the national park of Theniet El Had in the Wilaya de Tissemsilt. The species' essential oils could be explored to test their antimicrobial activity, especially against particular bacteria that cause alimentary intoxications. The study was carried out in the Laboratory of Plant Biology at Abdelhamid Ibn Badis University in Mostaganem, Algeria, during 2017. The aim of the current study was to evaluate the anti-bacterial activity of the essential oil of Pistacia lentiscus against pathogen bacteria using the disk diffusion methods. The antibiogram is made following the gliosisenvironment diffusion method, and makes it possible to determine the bacteria's sensibility to antibiotics. From a young culture (18 to 24 hours), a bacterial suspension is prepared and well homogenized afterward. The opacity must be equivalent to 0.5 McF (McFarland), the O.D being between 0.08 and 0.1 read at 625 nm. The results revealed that the essential oil exhibited strong levels of antibacterial activity against the tested microorganism regarding the MIC values. Salmonella had a great sensitivity to the essential oil. The biggest inhibition zones have been obtained for Salmonella sp, Acinetobacter sp, Staphylococcus aureus and Bacillus sp (23, 20, 19 and 19 mm, respectively). So, we considered that those microorganisms were more sensitive to that oil. In the same way, Pseudomonas aeruginosa has been judged to be more sensitive to the oil than prot (16 and 12 mm, respectively). Based on the findings of the present study, novel antibacterial agents could be developed, and it is recommended that the use of Pistacia lentiscus be promoted in traditional treatment.
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