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Growth of Salmonella Enteritidis in the presence of quorum sensing signaling compounds produced by Pseudomonas aeruginosa

  • Weijia He , Huamei Yang , Xiang Wang , Hongmei Li and Qingli Dong EMAIL logo
Published/Copyright: November 19, 2021

Abstract

Quorum sensing (QS) can exist in food-related bacteria and potentially affect bacterial growth through acyl-homoserine lactones (AHLs). To verify the role of QS compounds in the cell-free supernatant, this study examined the effect of supernatant extracted from Pseudomonas aeruginosa culture on the growth kinetics of Salmonella Enteritidis. The results showed that the lag time (λ) of S. Enteritidis was apparently reduced (p < 0.05) under the influence of P. aeruginosa culture supernatant compared with the S. Enteritidis culture supernatant. HPLC-MS/MS test demonstrated that AHLs secreted by P. aeruginosa were mainly C14-HSL with a content of 85.71 μg/mL and a small amount of 3-oxo-C12-HSL. In addition, the commercially synthetic C14-HSL had positive effects on the growth of S. Enteritidis, confirming once again that the growth of S. Enteritidis was affected by AHL metabolized by other bacteria and the complexity of bacterial communication.


Corresponding author: Qingli Dong, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, 516 Jungong Rd., Shanghai 200093, P. R. China, E-mail:

Funding source: Science and Technology Promoting Agriculture Project of Shanghai Municipal Commission of Agriculture and Rural Affairs University of Shanghai for Science and Technology

Award Identifier / Grant number: X2021-02-08-00-12-F00782

Acknowledgements

We are grateful to Dr. Qing Liu (University of Shanghai for Science and Technology, Shanghai, CHN) for kindly providing the Salmonella Enteritidis strain, and to Huamei Yang (Center for Disease Control and Prevention, Taizhou, CHN) for her valuable technical assistance.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This research was supported by Science and Technology Promoting Agriculture Project of Shanghai Municipal Commission of Agriculture and Rural Affairs (Grant No. X2021-02-08-00-12-F00782).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-03-22
Accepted: 2021-11-01
Published Online: 2021-11-19

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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