期刊
ANALYTICA CHIMICA ACTA
卷 1248, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.aca.2023.340885
关键词
Salmonella; Hi1A; splintR ligase; PCR; CRISPR; Cas12a
This article introduces a new method for detecting viable Salmonella bacteria, which can accurately identify microbial cells and detect multiple serotypes of Salmonella.
Several viable Salmonella bacteria are capable of causing severe human diseases and huge economic losses. In this regard, viable Salmonella bacteria detection techniques that can identify small numbers of microbial cells are highly valuable. Here, we present a detection method (referred to as SPC) based on the amplification of tertiary signals using splintR ligase ligation, PCR amplification and CRISPR/Cas12a cleavage. The detection limit of the SPC assay was 6 copies (HiIA RNA) and 10 CFU (cell). Based on Intracellular HiMA RNA detection, this assay can be used to distinguish between viable and dead Salmonella. In addition, it is able to detect multiple serotypes of Salmonella and has been successfully used to detect Salmonella in milk or isolated from farms. Overall, this assay is a promising test for viable pathogens detection and biosafety control.
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