Rapid identification of foodborne bacteria with hyperspectral microscopic imaging and artificial intelligence classification algorithms

• Published in: Food control Vol. 130; p. 108379
• Main Authors: Kang, Rui, Park, Bosoon, Ouyang, Qin, Ren, Ni
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2021
• Subjects: Artificial intelligence classifier; Foodborne pathogen; Hyperspectral microscopy; Rapid classification; Rapid classification; Artificial intelligence classifier; Foodborne pathogen; Hyperspectral microscopy
• ISSN: 0956-7135; 1873-7129
• DOI: 10.1016/j.foodcont.2021.108379

An artificial intelligence (AI) assisted hyperspectral microscopic imaging (HMI) method was successfully developed to differentiate five common foodborne pathogens simultaneously. HMI is extremely powerful for characterizing living cells, with every pixel of the cell region containing abundant spectral information. Three regions of interest (ROIs), including the whole-cell ROI, boundary ROI (outer membrane of cells), and center ROI (inner area of cells) were investigated to assess their classification performance. An artificial recurrent neural network named the long-short term memory (LSTM) network was proposed and optimized to directly process the spectra acquired from different ROIs. Compared to principal component analysis (PCA) based classifiers such as latent discriminant analysis (PCA-LDA, 66.0%), the k-nearest neighbors (PCA-KNN, 74.0%), and the support vector machine (PCA-SVM, 85.0%), our AI-based classifier achieved the highest accuracy of 92.9% for the center ROI dataset. Furthermore, AI-assisted HMI is capable of predicting spectra instantly, making it an efficient tool for foodborne pathogen identification. [Display omitted] •AI assisted HMI method was developed to differentiate common foodborne pathogens.•Different ROIs for spectral extraction were investigated in classification task.•LSTM network can facilitate the classification of different foodborne bacteria.