Foods (Nov 2023)

Chemical Composition and Antimicrobial Activity against the <i>Listeria monocytogenes</i> of Essential Oils from Seven <i>Salvia</i> Species

  • Maria Francesca Bozzini,
  • Ylenia Pieracci,
  • Roberta Ascrizzi,
  • Basma Najar,
  • Marco D’Antraccoli,
  • Luca Ciampi,
  • Lorenzo Peruzzi,
  • Barbara Turchi,
  • Francesca Pedonese,
  • Alice Alleva,
  • Guido Flamini,
  • Filippo Fratini

DOI
https://doi.org/10.3390/foods12234235
Journal volume & issue
Vol. 12, no. 23
p. 4235

Abstract

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In recent years, essential oils (EOs) have received interest due to their antibacterial properties. Accordingly, the present study aimed to investigate the effectiveness of the EOs obtained from seven species of Salvia on three strains of Listeria monocytogenes (two serotyped wild strains and one ATCC strain), a bacterium able to contaminate food products and cause foodborne disease in humans. The Salvia species analysed in the present study were cultivated at the Botanic Garden and Museum of the University of Pisa, and their air-dried aerial parts were subjected to hydrodistillation using a Clevenger apparatus. The obtained EOs were analysed via gas chromatography coupled with mass spectrometry for the evaluation of their chemical composition, and they were tested for their inhibitory and bactericidal activities by means of MIC and MBC. The tested Eos showed promising results, and the best outcomes were reached by S. chamaedryoides EO, showing an MIC of 1:256 and an MBC of 1:64. The predominant compounds of this EO were the sesquiterpenes caryophyllene oxide and β-caryophyllene, together with the monoterpenes bornyl acetate and borneol. These results suggest that these EOs may possibly be used in the food industry as preservatives of natural origins.

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