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) Vietnam’s tuna exports reached USD 81 million in April 2026, down 6% compared to the same period in 2025. In the first four months of the year, export turnover totaled USD 289 million, down 4.8%. Although the overall export picture has yet to brighten significantly, market trends are becoming increasingly diversified rather than moving in a single direction.
(seafood.vasep.com.vn) Vietnam’s pangasius industry is undergoing strong restructuring starting from the broodstock and fingerling segment in order to improve productivity, quality, and export competitiveness. This is considered a critical foundation for the sustainable development of the industry amid rising production costs and increasingly stringent market requirements.
(seafood.vasep.com.vn) According to Vietnam Customs data, pangasius exports in April 2026 reached USD 206 million, up 18% compared to the same period in 2025 — marking another consecutive month of double-digit growth since the beginning of the year. Cumulative pangasius export turnover in the first four months of 2026 reached USD 720 million, up 17% year-on-year, reflecting the positive growth momentum of this key export product.
(seafood.vasep.com.vn) Vietnam’s shrimp exports in the first four months of 2026 maintained positive growth momentum, reaching approximately USD 1.5 billion, up 15% compared to the same period last year. However, behind this result lies diverging trends across markets, as the global shrimp industry continues to face pressure from inflation, high inventories, price competition, and increasing trade risks.
(seafood.vasep.com.vn) In Vinh Tuy commune (Kien Giang Province), many shrimp farmers are adopting bottom aeration systems and reporting clear economic benefits, helping increase income and reduce production risks.
(vasep.com.vn) In the first three months of 2026, Vietnam’s exports of crabs and other crustaceans reached more than USD 93 million, up 23% compared to the same period last year. The result shows that the sector is experiencing a fairly positive recovery, especially in its two key product groups: crabs and swimming crabs. However, behind the growth figures are several concerns: export markets remain highly concentrated, raw material supply is unstable, and trade barriers from the US and EU are becoming increasingly stringent.
(seafood.vasep.com.vn) In Ca Mau province, many farmers are transitioning from traditional methods to high-tech shrimp farming, adopting recirculating systems with minimal water exchange to improve efficiency and reduce risks. In Hung My commune alone, there are about 260 super-intensive shrimp farming households covering more than 265 hectares, playing a key role in local economic development.
(seafood.vasep.com.vn) In the first three months of 2026, Vietnam’s exports of fish cake and surimi reached USD 63 million, down 5% compared to the same period last year. Although total export value declined slightly due to decreases in some key markets, many other destinations continued to post strong growth, opening up room for this convenience-oriented processed segment in the coming quarters.
(seafood.vasep.com.vn) Favorable weather conditions in the early months of 2026 have brought encouraging signs for fisheries activities in Quang Tri. Output has grown steadily, contributing to improved livelihoods for local residents.
Entering 2026, Vietnam’s seafood industry is facing a period of both high expectations and mounting pressures. Following the positive recovery in 2025, production and export activities in Q1/2026 demonstrated the strong adaptability of Vietnam’s seafood business community amid continued global trade volatility, intensifying international competition, and increasingly stringent compliance requirements in import markets.
VASEP - HIỆP HỘI CHẾ BIẾN VÀ XUẤT KHẨU THỦY SẢN VIỆT NAM
Chịu trách nhiệm: Ông Nguyễn Hoài Nam - Phó Tổng thư ký Hiệp hội
Đơn vị vận hành trang tin điện tử: Trung tâm VASEP.PRO
Trưởng Ban Biên tập: Bà Phùng Thị Kim Thu
Giấy phép hoạt động Trang thông tin điện tử tổng hợp số 138/GP-TTĐT, ngày 01/10/2013 của Bộ Thông tin và Truyền thông
Tel: (+84 24) 3.7715055 – (ext.203); email: kimthu@vasep.com.vn
Trụ sở: Số 7 đường Nguyễn Quý Cảnh, Phường An Phú, Quận 2, Tp.Hồ Chí Minh
Tel: (+84) 28.628.10430 - Fax: (+84) 28.628.10437 - Email: vasephcm@vasep.com.vn
VPĐD: số 10, Nguyễn Công Hoan, Ngọc Khánh, Ba Đình, Hà Nội
Tel: (+84 24) 3.7715055 - Fax: (+84 24) 37715084 - Email: vasephn@vasep.com.vn