Related Experiment Video
Updated: Jan 25, 2026

17:16
Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
Published on: June 3, 2018
14.1K
DNA-Based Rapid Methods for the Detection of Foodborne Pathogens
1Department of Microbiology, Iowa State University, Ames, Iowa 50011.
Journal of Food Protection
|May 5, 2019
Summary
Rapid DNA detection methods are crucial for identifying foodborne pathogens like Salmonella and E. coli due to rising illness reports. This review covers new technologies and hybridization assays for food microbiology applications.
Area of Science:
- Food microbiology
- Molecular diagnostics
- Food safety
Background:
- Increasing incidence of foodborne illnesses necessitates advanced detection techniques.
- Current methods for identifying foodborne microorganisms require improvement in speed, sensitivity, and reliability.
- DNA-based detection offers a promising avenue for accurate microbial identification.
Purpose of the Study:
- To review recent technological advancements in DNA-based detection methods for foodborne microorganisms.
- To provide an overview of hybridization assays relevant to food microbiology.
- To highlight applications for common foodborne pathogens.
Main Methods:
- Literature review of recent technologies in DNA detection.
- Focus on hybridization assays for food microbiology.
- Emphasis on specific foodborne pathogens: Salmonella spp., Shigella spp., Listeria spp., Escherichia coli, and Yersinia enterocolitica.
Main Results:
- Emerging DNA detection technologies offer enhanced sensitivity and speed.
- Hybridization assays show significant potential for rapid and reliable pathogen identification.
- The review consolidates information on methods applicable to key foodborne bacteria.
Conclusions:
- Advancements in DNA detection technologies are vital for combating foodborne illnesses.
- Hybridization assays represent a key area of development for food safety.
- Effective detection of common foodborne pathogens is achievable with modern molecular methods.
Related Concept Videos
DNA Base Pairing
33.1K
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
33.1K
DNA Base Pairing
32.1K
32.1K
Base-pairing and DNA Repair
90.9K
90.9K
Effects of EDTA on End-Point Detection Methods
634
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
634
From DNA to Protein
22.3K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
22.3K
Precipitation Titration: Endpoint Detection Methods
5.9K
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
In the Volhard method, a standard excess of AgNO3 is first added to the...
5.9K

