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Review
. 2021 Oct 11;10(10):2402.
doi: 10.3390/foods10102402.

Overview of Rapid Detection Methods for Salmonella in Foods: Progress and Challenges

Minglu Wang  1 , Yilun Zhang  1 , Fangyuan Tian  1 , Xiaoyu Liu  1 , Shuyuan Du  1 , Guocheng Ren  1
Affiliations
Review

Overview of Rapid Detection Methods for Salmonella in Foods: Progress and Challenges

Minglu Wang et al. Foods. .

Abstract

Salmonella contamination in food production and processing is a serious threat to consumer health. More and more rapid detection methods have been proposed to compensate for the inefficiency of traditional bacterial cultures to suppress the high prevalence of Salmonella more efficiently. The contamination of Salmonella in foods can be identified by recognition elements and screened using rapid detection methods with different measurable signals (optical, electrical, etc.). Therefore, the different signal transduction mechanisms and Salmonella recognition elements are the key of the sensitivity, accuracy and specificity for the rapid detection methods. In this review, the bioreceptors for Salmonella were firstly summarized and described, then the current promising Salmonella rapid detection methods in foodstuffs with different signal transduction were objectively summarized and evaluated. Moreover, the challenges faced by these methods in practical monitoring and the development prospect were also emphasized to shed light on a new perspective for the Salmonella rapid detection methods applications.

Keywords: Salmonella; bioreceptor; food contaminant; rapid detection method; recognition element.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Overview of the bioreceptors and rapid detection methods for Salmonella.
Figure 2
Figure 2
Optical sensing for Salmonella detection. (A) A paper-based colorimetric detection device [62]. (B) Fluorescence immunoassay for Salmonella by the loading and release of quantum dots [64]. (C) Label-based signal detection strategy based on the surface-enhanced Raman spectral scattering [71]. (D) A sensing strategy of targeting lytic Salmonella by the photothermal effect of Au NPs [80].
Figure 3
Figure 3
Schematic diagram of a label-free electrochemical immunosensor for Salmonella detection. (a) label-free laser-induced graphene processing, (b) working electrode, (c) passivation of the working electrode, (d) SEM image showing, (e) antibodies immobilization, (f) Salmonella binding to the electrode [115].
Figure 4
Figure 4
(A) Enhancement of specific and sensitive sensing of Salmonella by the pretreatment of magnetic separation and enrichment [72]. (B) Fluorescence detection strategy based on a smartphone [139].
See this image and copyright information in PMC

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