Antimicrobial activity of individual and mixed fractions of dill, cilantro, coriander and eucalyptus essential oils.
Essential oils from dill (Anethum graveolens L.), coriander (seeds of Coriandrum sativum L.), cilantro (leaves of immature C. sativum L.) and eucalyptus (Eucalyptus dives) were separated into heterogeneous mixtures of components by fractional distillation and were analyzed by gas chromatography-mass spectroscopy. Minimum inhibitory concentrations against gram-positive bacteria, gram-negative bacteria and Saccharomyces cerevisiae were determined for the crude oils and their fractions. Essential oil of cilantro was particularly effective against Listeria monocytogenes, likely due to the presence of long chain (C6-C10) alcohols and aldehydes. The strength and spectrum of inhibition for the fractions often exceeded those determined in the crude oils. Mixing of fractions resulted in additive, synergistic or antagonistic effects against individual test microorganisms.
Delaquis
Pascal J
PJ
Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Summerland, British Columbia. delaquisp@em.agr.ca
Stanich
Kareen
K
Girard
Benoit
B
Mazza
G
G
D028524:Anethum graveolens; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000494:pharmacology; D028526:Coriandrum; D005052:Eucalyptus; D005516:Food Microbiology; D005524:Food Technology; D008401:Gas Chromatography-Mass Spectrometry; D006090:Gram-Negative Bacteria / Q000187:drug effects* / Q000254:growth & development; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000254:growth & development; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000032:analysis / Q000494:pharmacology*; D012441:Saccharomyces cerevisiae / Q000187:drug effects* / Q000254:growth & development
D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D009822:Oils, Volatile