Viability Detection of Foodborne Bacterial Pathogens in Food Environment by PMA-qPCR and by Microscopic Observation

Abstract : Foodborne pathogens are responsible of foodborne diseases and food poisoning and thus pose a great threat to food safety. These microorganisms can adhere to surface and form a biofilm composed of an extracellular matrix. This extracellular matrix protects bacterial cells from industrial environmental stress factors such as cleaning and disinfection operations. Moreover, during these environmental stresses, many bacterial species can enter a viable but nonculturable (VBNC) state. VBNC cells are characterized by a loss of cultivability on conventional bacteriological agar. This leads to an underestimation of total viable cells in environmental samples, and thus poses a risk for public health. In this chapter, we present a method to detect viable population of foodborne pathogens in industrial environmental samples using a molecular method with a combination of propidium monoazide (PMA) and quantitative PCR (qPCR) and a fluorescence microscopic method associated with the LIVE/DEAD BacLight™ viability stain.
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https://hal-anses.archives-ouvertes.fr/anses-02158087
Contributor : Emmanuelle Chiffoleau <>
Submitted on : Monday, June 17, 2019 - 5:16:17 PM
Last modification on : Monday, June 17, 2019 - 5:16:19 PM

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  • HAL Id : anses-02158087, version 1
  • PUBMED : 30580403

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Thomas Brauge, Graziella Midelet-Bourdin, Christophe Soumet. Viability Detection of Foodborne Bacterial Pathogens in Food Environment by PMA-qPCR and by Microscopic Observation. Foodborne Bacterial Pathogens: Methods and Protocols, Springer, pp.117-128, 2019, 978-1-4939-9000-9. ⟨https://link.springer.com/protocol/10.1007%2F978-1-4939-9000-9_9⟩. ⟨anses-02158087⟩

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