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Effect of Broiler Carcass Washing on Fecal Contaminant Imaging

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  033122,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14065) @2003
Authors:   Kurt C. Lawrence, William R. Windham, Douglas P. Smith, Bosoon Park, Peggy Feldner
Keywords:   Hyperspectral, multispectral, imaging, imaging spectrometry, poultry, feces, food safety

The Food Safety and Inspection Service has mandated that there be no fecal contaminants on poultry carcasses when the carcasses enter the chiller tank because of a risk of food pathogens. Since the inception of the hazard analysis, critical control point mandate, the poultry industry has increased the amount of water use per bird to ensure compliance with this mandate. This paper reports on research to develop a method to identify fecal contaminants on poultry carcasses with a hyperspectral imaging system and to evaluate the effectiveness of this system for detecting contaminant residuals and stains on mechanical washed carcasses. The imaging system easily identified fecal contaminants (98%) prior to mechanical washing but also incorrectly identified 196 carcass features that were not contaminants (false positives). However, almost half of the false positives came from only five carcasses. Results confirm the feasibility of using such a system for detecting fecal contaminants. For washed carcasses, the hyperspectral imaging system significantly detected about 45% of the cecal stains (p < 0.0048). The system did not detect stains from duodenum, colon or ingesta contaminants. Contaminant exposure times of two or 12 min. and wash times of 8 or 12 s. did not significantly affect stain detection (p<0.05). Based on the interpretation of the FSIS regulation of fecal contaminants, fecal stains are not considered as contaminants. Therefore, to comply with the FSIS regulation while not adversely affecting the processing plants production, the hyperspectral imaging system should be modified to prevent identification of cecal stains.

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