Symbiosis culture of probiotic Escherichia coli Nissle 1917 and Lactobacillus rhamnosus GG using lactate utilization protein YkgG

Tseng, Yu-Chi; Xue, Chengfeng; Ng, I-Son

doi:10.1016/j.procbio.2023.01.011

Cited by 3 publications

(1 citation statement)

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“…Escherichia coli and Staphylococcus aureus are typical Gram-negative (G − ) and Gram-positive (G + ) pathogens. Most E. coli are symbiotic bacteria, and some can even be used as probiotics, such as E. coli Nissle 1917 (EcN), a unique endotoxin-free, biosafe and non-pathogenic strain that has received widespread attention for its probiotic function and ability to prevent gastrointestinal diseases [ 1 , 2 ]. However, there are also strains that are opportunistic or highly pathogenic to humans when consumed through food (e.g., strains belonging to serotype O157:H7, etc.)…”

Section: Introductionmentioning

confidence: 99%

Synthesizing Carbon Quantum Dots via Hydrothermal Reaction to Produce Efficient Antibacterial and Antibiofilm Nanomaterials

Cui,

Fan,

Liu

et al. 2023

Foods

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This study aimed to synthesize antibacterial carbon quantum dots (SP-CDs) from polyethyleneimine and spermidine via hydrothermal reaction. It was revealed that SP-CDs, with small size (7.18 nm) and high positive charge (+31.15 mV), had good fluorescence properties and lots of amino groups on their surfaces. The inhibition effect of SP-CDs on Staphylococcus aureus was better than that towards Escherichia coli, and the SP-CDs also had an inhibitory effect on multi-drug-resistant E. coli. The mechanism of SP-CDs shows that the SP-CDs were adsorbed on the surface of the negatively charged cell membrane through electrostatic interaction. SP-CDs can cause changes in membrane permeability, resulting in a shift of the cell membrane from order to disorder and the decomposition of chemical components, followed by the leakage of cell contents, resulting in bacterial death. SP-CDs can also significantly inhibit biofilm formation, destroy mature biofilms and reduce the number of living cells. Moreover, SP-CDs had negligible antimicrobial resistance even after 18 generations of treatment. This study proves that SP-CDs effectively inhibit the proliferation of foodborne pathogens, providing new feasibility for the application of carbon-based nanomaterials in the food industry.

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Section: Introductionmentioning

confidence: 99%