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1
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Antibacterial activity of essential oils of Salvia officinalis growing in Morocco

100%
Lahlou Y., Moujabbir S., Aboukhalaf A., El Amraoui B., Bamhaoud T.
Roczniki Państwowego Zakładu Higieny
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2023
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tom 74
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nr 4
Background. The bacterial infections treatment is complicated by antibiotic resistance. In this fact, the need for new therapeutic approaches to control bacterial infections is crucial. Therefore, discovering new antibiotics from medicinal plants, able to kill drug-resistant bacteria, is essential to saving modern medicine. Objective. This study was to evaluate the in vitro antibacterial activity of Salvia officinalis essential oil (SoEO) growing in Morocco. Material and methods. The essential oil was extracted by hydro distillation, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined by agar dilution method. The essential oil was analyzed by Fourier-transform infrared spectroscopy (FTIR) and fractionated/purified using column chromatography followed by thin-layer chromatography (TLC). Results. The results revealed that SoEO showed higher antimicrobial activity against Enterococcus faecalis and Citrobacter freundii. Fourier-transform infrared spectroscopy (FTIR) analysis, and purification/fractionation of SoEO, indicates that the most polar fraction F6 is the active fraction of SoEO. This finding can be explained by the existence of polar compounds in this fraction including alcohols, and phenols as thymol, eugenol, globulol, and spathulenol. Conclusions. It can be conclude that alcohols and phenols from Salvia officinalis essential oil (SoEO) have promising antibacterial activity. This action can offer a great possibility of the application of SoEO in the treatment of bacterial diseases.
2
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Antibacterial and antifungal activities of Moroccan wild edible plants selected based on ethnobotanical evidence

86%
Aboukhalaf A., Lahlou Y., Kalili A., Moujabbir S., Elbiyad J., El Amraoui B., Belahsen R.
Roczniki Państwowego Zakładu Higieny
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2024
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tom 75
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nr 3
Background. Despite the extensive literature focusing on identifying novel antimicrobials of plant origin, little work has been undertaken to examine the antimicrobial activity of wild edible plants. Objective. The current research aimed to determine the in vitro antimicrobial activity of methanolic extract of some common wild edible plants. Material and Methods. Disc diffusion and broth micro dilution methods were used to evaluate the antimicrobial activity of extracts of Mercurialis annua, Ziziphys lotus, Rubia peregrina, Origanum vulgare, Papaver rhoeas, Foeniculum vulgare, and Dysphania ambrosioides against known human microorganisms’ pathogens. Results. The result indicated that most of the extracts exhibited a range of in vitro growth inhibitory action against all bacterial strains and yeasts tested with inhibition zones ranging from 11 mm to 32 mm, MIC value ranging from 0.048 to 50 mg/ml and MBC and MFC values ranging from 0.048 to 100 mg/ml. Among the seven plant extracts tested, O. vulgare was the most effective showing high antimicrobial activity against all tested microbial strains. All plant extracts exhibited bactericidal activities against all the tested bacteria strains except for those of R. peregrina, P. rhoeas and F. vulgare which showed a bacteriostatic activity against E. coli and Pseudomonas sp. Antifungal activity was shown only by O. vulgare, F. vulgare and D. ambrosioides against both C. albicans and C. neoformans. Conclusion. These findings highlight the potential of wild edible plants to control human pathogenic microbes and demonstrate that these plants could be used as starting points for the development of novel antimicrobial compounds.
3
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Nutritional composition and bioactive compounds in a local grape variety Vitis Vinifera L. cultivated in Morocco

72%
Kalili A., El Ouafi R., Aboukhalaf A., Naciri K., Tbatou M., Moujabbir S., Belahyan A., Belahsen R.
Roczniki Państwowego Zakładu Higieny
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2023
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tom 74
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nr 1
Background. The vine is considered one of the most important and popular fruits in the world thanks to its high nutritional value and high fiber content. Objective. This study aim was to evaluate the nutritional composition in a local variety ‘Doukkali’ grape (Vitis vinifera L.) in the perspective of their suitability for pharmaceutical and agri-food use. Material and methods. The proximate composition and minerals were determined using AOAC methods, the total sugar by HPLC method. The total phenolic compounds using the Folin-Ciocalteu reagent, the total flavonoids using aluminum chloride colorimetric method and tannins by the method of vanillin. Results. The analysis of the raisin of this variety revealed a high carbohydrate content of 61% with high levels of glucose (31.6%), fructose (30.4%), dietary fiber (13.92%) and minerals including potassium (445.50 mg/100 g DM), calcium (193.26 mg/100 g DM), sulfur (171.63 mg/100 g DM), sodium (137.50 mg/100 g DM), phosphorus (99.79 mg/100 g DM), magnesium (54.74 mg/100 g DM) and iron (2.39mg/ g DM). Analysis of bioactive compounds showed significant content of polyphenols varying from 43 to 309.1 mg GAE/g DM, flavonoids from 1.0 to 23.8 mg CEQ/g DM and tannins from 2.5 to 50.45 mg TAE/g DM. Conclusions. The study shows that the local variety of Doukkali grape has an important nutritional potential that can contribute to the nutritional needs and the fight against malnutrition as well as to the dietary diversity of the local population.
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