To establish a procedure for differentiating normal chickens from chickens with septicemia/toxemia (septox) by machine inspection under the Hazard Analysis and Critical Control Point-Based Inspection Models Project, spectral measurements of 300 chicken livers, of which half were normal and half were condemned due to septox conditions, were collected and analyzed. Neural network classification of the spectral data after principal component analysis (PCA) indicated that normal and septox livers were correctly differentiated by spectroscopy at a rate of 96%. Analysis of the data established 100% correlation between the spectroscopic identification and the subset of samples, both normal and septox, that were histopathologically diagnosed. In an attempt to establish the microbiological etiology of the diseased livers, isolates from 30 livers indicated that the poultry carcasses were contaminated mostly with coliforms present in the environment, hindering the isolation of pathogenic microorganisms. Therefore, to establish the cause of diseased livers, a strictly aseptic environment and procedure for sample collection is required.
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