Canadian researchers, writing in the journal Angewandte Chemie International Edition, show how their fluorescent test system – DNAzymes – designed to track the DNA trails of pathogens does not require the time consuming steps and specialized equipment typically used in standard microbial tests.
"Current methods of foodborne bacterial detection take time. The five days it takes to detect listeria, for example, can translate into an outbreak that costs lives.
We have developed a universal test that uses less complex procedures but still generates precise and accurate results," said lead researcher, biochemist Yingfu Li.
Bacteria have their own spoor, leaving behind DNA trails of bacterial 'droppings'. So Li explained that, based on this fact, his team developed a testing method that works by tracking these metabolic by-products with molecular beacons that light up when they detect the DNA sequence left behind.
He said the DNAzymes method can be used to set up a simple ‘mix-and-read’ bacterial detection assay.
"More importantly, we have demonstrated that our method has the capability to detect a single live cell,” said the authors, who stressed that the ability to to do so is a hallmark of a method to detect food-borne pathogens.
Furthermore, the Canadian researchers report that although their method was demonstrated using a nonpathogenic strain of E. coli, it can “easily be implemented for pathogenic bacteria and viruses.”
They added that while the demonstrated assay used fluorescence as the reporting mechanism, the same DNAzyme probe could be used for the design of a colorimetric assay using a rolling circle amplification/organic dye strategy.
USDA testing call
There have been notable outbreaks of foodborne illnesses arising out of E.coli contamination of foods such as beef, spinach and dough in the
Last week saw the US Department of Agriculture (USDA) claim that 44 of the most serious food recalls in the US from 2007 to 2009 could have been prevented if the agency had had a ‘test and hold’ procedure in place for meat and poultry products during that period.
In light of this, the department’s Food Safety and Inspection Service, which inspects “billions of pounds of meat, poultry and processed egg products annually” has proposed that companies should hold meat and poultry products until inspectors have received foodborne pathogen test results, in an effort to reduce illness.
The American Meat Institute, which represents most of the meat processing sector in the
(vasep.com.vn) VASEP has officially announced the program for Vietnam Seafood Summit 2026 (VSS 2026), featuring five in-depth sessions covering industry outlooks, trade barriers, buyer demand, the domestic market, and solutions to improve productivity and reduce costs across the seafood value chain.
(vasep.com.vn) Vietnam’s shrimp exports reached US$3.7 billion in the first nine months of 2026, up 11% year on year. Although growth has been supported by China and several markets within the CPTPP, momentum is slowing as exports to the United States and the European Union decline. Tariff pressures, international competition, and raw material challenges are creating significant hurdles for exporters in the final months of the year.
(vasep.com.vn) Markets are changing faster, buyer requirements are becoming more demanding, and trade barriers are growing increasingly complex. In this environment, seafood businesses need more than an understanding of current market conditions. They need a longer-term perspective to answer a critical question: Where will growth opportunities come from in 2027–2029, and what should businesses do now to prepare? This is one of the key reasons why VASEP is organizing Vietnam Seafood Summit 2026.
(vasep.com.vn) In the first eight months of 2026, Vietnam’s pangasius exports to the Middle East reached US$113 million, up 7% year on year from the same period in 2025. Growth has become more pronounced in recent months. In August alone, exports to the region totaled US$20 million, an increase of 24%. This indicates that demand for Vietnamese pangasius in the Middle East is gradually recovering after a slowdown in March, although the pace of recovery varies across markets.
(vasep.com.vn) China’s shrimp imports continued to grow strongly in 2026, while Vietnam’s shrimp exports to the market also recorded notable growth. However, behind these positive figures lie two distinct trends: Chinese consumption is growing more slowly than imports, and lobster accounts for a substantial share of Vietnam’s shrimp exports to China, making its product mix significantly different from those of Ecuador and India. Exporters therefore need to assess each segment carefully to understand the opportunities and risks.
(vasep.com.vn) Changing markets, shifting buyer demand, and increasingly complex trade barriers are raising a key question for Vietnam’s seafood industry: Where will the new growth opportunities lie in 2027–2029?
(seafood.vasep.com.vn) As of the end of August 2026, Vietnam’s tilapia exports to the United States reached $21 million, representing a steep 48% year-over-year decline and accounting for 23% of the country's total tilapia export turnover. Frozen fillets accounted for 78% with the remainder consisting of whole frozen tilapia and frozen cuts.
(seafood.vasep.com.vn) After a volatile first half of the year, Vietnam’s pangasius exports to Brazil registered robust growth in July and August 2026. In August alone, export turnover reached $19 million, surging 73% compared to the same period in 2025. Cumulatively for the first eight months, total export value reached $124 million, reflecting an 8% year-over-year increase.
(seafood.vasep.com.vn) Besides modifying their boats, many fishermen in Dak Lak province are making efforts to venture out to sea to harvest seafood during the rough sea season.
(seafood.vasep.com.vn) At the Responsible Seafood Summit and TCRS Shrimp Summit 2026, organized by the GSA (Global Seafood Alliance) in Bangkok, Thailand, the conversation about the future of the shrimp industry began with one of its most important foundations: seedstock quality.
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