Evaluation of antilisterial action of cilantro oil on vacuum packed ham.
Cilantro oil is an essential oil preparation extracted from the plant Coriandrum sativium. A series of experiments were conducted to evaluate the ability of cilantro oil to control the growth of Listeria monocytogenes on vacuum-packed ham. The in vitro minimal inhibitory concentration for five strains of L. monocytogenes was found to vary from 0.074% to 0.018% depending on strain. Cilantro oil treatments were then tested on ham disks inoculated with a cocktail of the five L. monocytogenes strains. The treatments studied were 0.1%, 0.5%, and 6% cilantro oil diluted in sterile canola oil or incorporated into a gelatin gel in which lecithin was used to enhance incorporation of the cilantro oil. Gelatin gel treatments were also conducted with 1.4% monolaurin with or without 6% cilantro oil to determine if an interaction between the antimicrobials could increase inhibition of L. monocytogenes. Treated ham was then vacuum-packed and stored at 10 degrees C for up to 4 weeks. The only cilantro oil treatment which inhibited growth of L. monocytogenes on the ham samples was 6% cilantro oil gel. Samples receiving this treatment had populations of L. monocytogenes 1.3 log CFU/ml lower than controls at week 1 of storage, though there was no difference between treatments from week 2 onward. It appears that immobilization of the antimicrobial in a gel enhanced the effect of treatments. Cilantro oil does not appear to be a suitable agent for the control of L. monocytogenes on ham. The possible reasons for reduced effectiveness of cilantro oil against L. monocytogenes on ham are discussed.
Gill
A O
AO
Department of Food Science, University of Manitoba, Winnipeg, Canada.
Delaquis
P
P
Russo
P
P
Holley
R A
RA
D000818:Animals; D015169:Colony Count, Microbial; D028526:Coriandrum; D005519:Food Preservation / Q000379:methods*; D005782:Gels; D005989:Glycerides / Q000494:pharmacology; D007848:Laurates / Q000494:pharmacology; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000254:growth & development; D008461:Meat Products / Q000382:microbiology*; D008826:Microbial Sensitivity Tests; D050178:Monoglycerides; D010938:Plant Oils / Q000494:pharmacology*; D013501:Surface-Active Agents / Q000494:pharmacology; D013552:Swine; D013997:Time Factors; D014618:Vacuum
D005782:Gels; D005989:Glycerides; D007848:Laurates; D050178:Monoglycerides; D010938:Plant Oils; D013501:Surface-Active Agents; C020777:monolaurin