HYBRID EVENT: You can participate in person at Valencia, Spain or Virtually from your home or work.
Hybrid Event
September 18-20, 2023 | Valencia, Spain
ICTM 2019

Lorenzi Vannina

Lorenzi Vannina, Speaker at Global Event on Ethnomedicine
University of Corsica, France
Title : Antibacterial action of Corsican honeys on nosocomial and foodborne pathogens


The antibacterial activity of eleven protected designation of origin (PDO) “Miel de Corse – Mele di Corsica” commercial corsican honeys was investigated. First, they were classified according to the PDO recommendation using melissopalynological analysis leading to 2 “Spring”, 3 “Chestnut grove”, 1 “Summer maquis”, 2 “Honeydew maquis” and 1 “Autumn maquis” and 2 samples classified as “generic” corsican honeys. Then, they have been tested on seven foodborne and nosocomial bacterial strains by Minimum Inhibitory Concentration (MIC90). 29 of the 77 MIC90 values determined were under 10%. Pseudomonas aeruginosa and Staphylococcus aureus seem to be the most sensitive strains especially in presence of “Honeydew maquis”, “generic” corsican honeys and 2 “Chestnut grove” honeys (MIC90 values ranging from under 5 to 9%). However, Enterococcus faecalis appears resistant to the action of the honey (MIC90 values systematically above 10%). Statistical analysis was used to help correlate the antibacterial action and the palynological composition of the different honeys. The samples were classified into two groups: “Autumn maquis”, “Summer maquis” and “Spring” can be considerate as globally not or only moderately active whereas “Chestnut grove”, “Honeydew maquis” and “generic” corsican honeys are biologically active. Our results demonstrate (suggest) that Castanea sativa pollen is responsible for the activity of corsican honeys. However, synergistic or antagonist effects between Castanea sativa pollen and other nectariferous or polliniferous taxa seem to be involved in the intensity of the response observed.


Dr. Lorenzi studied Analytical Chemistry at the University of Corsica (France) and graduated as MS in 2001. Then, she joined the research group of prof. Berti at the UMR-CNRS 6134 of the University of Corsica (France). She received her PhD degree in 2005 at the same institution. After one year postdoctoral fellowship supervised by Dr. Bolla at the Membrane and Therapeutic Targets Laboratory of the Aix-Marseille University (France), she obtained the position of an Associate Professor at the University of Corsica (France). She has published a dozen of research articles in SCI(E) journals.