A novel, integrated, real‐time electrochemical loop‐mediated isothermal amplification (LAMP) device for pathogen detection in food was developed. The electrochemical LAMP device for detection of the vt gene in E. coli O157 : H7 and invA gene in Salmonella enterica was implemented with DNA intercalating probes‐methylene blue. To improve assay efficiency, the optimal concentration of MB was determined to be 30 μM. The real‐time electrochemical LAMP results of gene serial dilutions were compared to the fluorescence‐based detection method. For E. coli O157 and Salmonella, the assay detection limits were 10 DNA copies and 1 DNA copy, respectively, in a reaction time of less than 30 min. The electrochemical and optical LAMP method analyses were realized with 10 % milk to simulate the turbid environment of real food samples. In real‐time LAMP of Salmonella in a turbid environment, the detection limit of 10 copies without pretreatment was possible using the electrochemical method only. Our electrochemical device was used for bacterial detection in 150 turbid food samples, including juice, milk, and soy milk. This electrochemical device has many advantages, including size, portability, high specificity, and high sensitivity, while also being a user‐friendly device that provides stable signals. Thus, to the best of our knowledge, this new electrochemical device demonstrates the best performance for bacterial detection in the rapid contaminated food detection category.

The overuse of antibiotics has resulted in the emergence of antibiotic resistance, not only in bacteria but also in fungi. Streptomyces are known to produce numerous secondary metabolites including clinically useful antibiotics. In this study, we screened for antibiotic-producing actinobacteria from soils in Taipei and discovered a Streptomyces strain SC26 that displayed antimicrobial activities against Gram-positive bacteria and fungi, but the compounds are heat-labile. Upon UV mutagenesis, a late-sporulation mutant SC263 was isolated with the same antibiotic spectrum but increased in thermostability. The nature of the antibiotic is not clear, but its activity was resistant to proteolytic, nucleolytic and pancreatic digestions, and was retained by the 100 kDa membrane during filtration. To gather more information on SC263, the genome was sequenced, which produced three contigs with a total of 8.2 Mb and was assigned to the species of Streptomyces spororaveus based on the average nucleotide identity to the reference species S. spororaveus NBRC 15456.