Effect of chitosan on spoilage bacteria, Escherichia coli and Listeria monocytogenes in cured chicken meat.
The effects of essential oil (EO) of oregano and chitosan on the microbial quality and growth inhibition of Listeria monocytogenes and Escherichia coli O157:H7 in the Iranian traditional ready-to-barbecue chicken was evaluated. Thus, three groups of samples were prepared. One of them was considered to evaluate for aerobic plate count (APC), lactic acid bacteria (LAB), psychrophilic and enterobacteriacae counts and the other two groups were inoculated with E. coli O157:H7 and L. monocytogenes 4b to investigate the effect of oregano EO and chitosan on pathogenic bacteria. All groups were stored at 3, 8 and 20°C. Oregano showed antibacterial effects against APC, LAB, psychrophilics, enterobacteriacae and E. coli O157:H7, whereas, such an effect was not observed against L. monocytogenes. Chitosan individually did not show an inhibitory effect on the spoilage-inducing bacteria and E. coli, but was effective against L. monocytogenes. Using chitosan and oregano EO in combination can reduce the number of spoilage and safety indicators and also the two food-borne pathogens in ready-to-barbecue chicken meat.
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz 71441-69155, Iran. Electronic address: shekar@shirazu.ac.ir.
Seyed Shahram
SS
Shekarforoush
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz 71441-69155, Iran.
Sara
S
Basiri
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz 71441-69155, Iran.
Hadi
H
Ebrahimnejad
Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz 71441-69155, Iran.
Saeid
S
Hosseinzadeh
D000818:Animals; D000900:Anti-Bacterial Agents; D048271:Chitosan / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects*; D005516:Food Microbiology; D005519:Food Preservation; D006801:Humans; D008089:Listeria monocytogenes / Q000187:drug effects*; D008460:Meat / Q000382:microbiology*; D050296:Microbial Viability / Q000187:drug effects
D000900:Anti-Bacterial Agents; D048271:Chitosan
Chicken meat; Chitosan; E. coli O157:H7; Listeria monocytogenes; Oregano