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Combination of Bifidobacterium breve and antibiotics against Clostridioides difficile: effect of the time interval of combination on antagonistic activity

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Abstract

Co-administration of probiotics and antibiotics has been used to prevent or treat primary Clostridioides difficile (pCDI), and the closer the interval between the combination, the more effective it is, but the reason behind this is unknown. In this study, the cell-free culture supernatant (CFCS) of Bifidobacterium breve YH68 was used in combination with vancomycin (VAN) and metronidazole (MTR) to treat C. difficile cells. The growth and biofilm production of C. difficile under different co-administration time interval treatments were determined by optical density and crystalline violet staining, respectively. The toxin production of C. difficile was determined by enzyme immunoassay, and the relative expressions of C. difficile virulence genes tcdA and tcdB were determined by real-time qPCR method. Meanwhile, the types and contents of organic acids in YH68-CFCS were investigated by LC-MS/MS. The results showed that YH68-CFCS in combination with VAN or MTR significantly inhibited the growth, biofilm production, and toxin production of C. difficile in the effective time interval range (0–12 h) but did not affect the expression level of C. difficile virulence genes. In addition, the effective antibacterial component of YH68-CFCS is lactic acid (LA).

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The authors confirm that the data supporting the findings of this study are available within the article.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 32200154).

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JPY conceptualized the presented idea, supervised the findings, analyzed the results, and wrote the manuscript. YNL and LTM performed the bioinformatics analysis of the data. JPY and LTM helped in the sampling and sample processing. JPY supervised the project and acquired financial support for the project leading to this publication. All authors read and approved the manuscript.

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Correspondence to Jingpeng Yang or Lingtong Meng.

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Yang, J., Li, Y. & Meng, L. Combination of Bifidobacterium breve and antibiotics against Clostridioides difficile: effect of the time interval of combination on antagonistic activity. Int Microbiol 26, 833–840 (2023). https://doi.org/10.1007/s10123-023-00340-6

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  • DOI: https://doi.org/10.1007/s10123-023-00340-6

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