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Research Project: Improving the Quality of Animal Hides, Reducing Environmental Impacts of Hide Production, and Developing Value-Added Products from Wool

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Title: Cinnamayldehyde/lactic acid spray wash treatment for meat safety and byproduct quality assurance

Author
item LONG III, WILBERT - Orise Fellow
item Sarker, Majher
item Liu, Cheng Kung

Submitted to: Journal of Food Science and Technology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/7/2018
Publication Date: 12/29/2018
Citation: Long III, W., Sarker, M.I., Liu, C. 2018. Cinnamayldehyde/lactic acid spray wash treatment for meat safety and byproduct quality assurance. Journal of Food Science and Technology. 6(6):280-289.

Interpretive Summary: Bacteria contamination on the haired surface of cattle serves as a major issue for meat industry. Cattles are constantly exposed to manure, soil and other environmental factors which may harbour harmful bacteria. These microorganisms can be transferred from the outer surface of a cattle to the undlying meat during meat processing operation in slaughter house either through equipments or workers. Therefore, carcass decontamination prior removal of cattle hide/skin is important to avoid crosscontamination of raw meat ensuring public safety. In addition there are limited studies that have examined methods of ensuring meat safety by decontamination of carcass while concurrently investigating the impact of decontamination formulation on cattle hides, a value added commidity of the meat industry. This study investigated the effects of two naturally derived antimicrobials (cinnamaldehyde and latic acids) on the ability to reduce pathogens (harmful microorganisms) of cattle hides and subsequently investigated their effects on the quality of the leather which is produced from the treated hides.

Technical Abstract: This study evaluated the effectiveness of spray washing with aqueous based solution of cinnamaldehyde (CA) and CA plus lactic acid (LA) in reducing aerobic bacteria, Enterobacteriaceae, E.coli and Salmonella from the grain surface of bovine hide so that the developed solutions can potentially be used to decontaminate the cattle carcasses to ensure meat safety. This study also examined the application impacts of the developed formulations on leather produced from the treated hides recognizing the value of cattle byproducts. Two concentrations (0.5% and 0.75%) of CA and LA were used to develop the formulations for 2 to 5 minutes treatment. Research data revealed the fresh cattle hides washed with water alone (control) resulted in recovery of aerobic bacteria of 7.39 and 9.30; Enterobacteriaceae of 5.43 and 5.42; E.coli of 4.88 and 5.50 and Salmonella of 3.81 and 4.65 log CFU per leather panel at 2 and 5 minutes of treatment respectively. Comparing to control, hides treated with CA solution alone resulted in the highest reduction of aerobic bacteria, Enterobacteriaceae, E.coli and Salmonella up to 2.22, 0.420, 0.723 and 1.61 log CFU respectively for 2 to 5 minutes treatment. The treatment with the formulations of CA plus LA resulted in the highest reduction of aerobic bacteria, Enterobacteriaceae, E.coli and Salmonella up to 2.12, 3.12, 2.33 and 2.28 log CFU respectively for 2-5 minutes of treatments. From microscopic analysis, mechanical and subjective examinations, it was revealed that the leather produced from the formulation treated hides were comparable to the control in terms of structural integrity.