Tag Archives: science daily

Research – Antibiotic resistant salad: Resistant Listeria monocytogenes not as widespread as thought

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Antibiotic-resistant strains of the food-poisoning microbe Listeria monocytogenes in unprocessed salad products is not quite as widespread as scientists originally suspected. A new study reveals that strains of the microbe falling into six distinct groups can all be found on such products, but 82 percent of those strains succumb to at least one of sixteen common antibiotics used in veterinary and human listeriosis treatment.

Research – Oat Breakfast Cereals May Contain a Common Mould-Related Toxin

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Oats are often touted for boosting heart health, but scientists warn that the grain and its products might need closer monitoring for potential mold contamination. They report that some oat-based breakfast cereals in the US contain a mold-related toxin called ochratoxin A that’s been linked to kidney cancer in animal studies.

 

Research – Norovirus stomach bug: Scientists Take Step Towards Drug to Treat

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An experimental drug currently being trialled for influenza and Ebola viruses could have a new target: norovirus, often known as the winter vomiting virus. A team of researchers has shown that the drug, favipiravir, is effective at reducing — and in some cases eliminating — norovirus infection in mice

Research – Pathogen Adaptation – Salmonella – Staphylococcus aureus

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Bacteria can evolve rapidly to adapt to environmental change. When the “environment” is the immune response of an infected host, this evolution can turn harmless bacteria into life-threatening pathogens. A study published on December 12 in PLOS Pathogens provides insight into how this happens.

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A protein in Salmonella inactivates mast cells — critical players in the body’s fight against bacteria and other pathogens — rendering them unable to protect against bacterial spread in the body, according to researchers at Duke Medicine and Duke-National University of Singapore (Duke-NUS).

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Scientists have used a new method to map the response of every salmonella gene to conditions in the human body, providing new insight into how the bacteria triggers infection.

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Scientists at the Stanford University School of Medicine have revealed that formerly overlooked sites deep inside the nose may be reservoirs for Staphylococcus aureus, a major bacterial cause of disease.

USA Research – Whole Chickens from Farmers Markets – Higher Pathogen Risk

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Raw, whole chickens purchased from farmers markets throughout Pennsylvania contained significantly higher levels of bacteria that can cause foodborne illness compared to those purchased from grocery stores in the region, according to a small-scale study by researchers in Penn State’s College of Agricultural Sciences

Of 100 whole chickens purchased from farmers markets, 90 percent tested positive for Campylobacter and 28 percent harbored Salmonella.

By comparison, during the same period, 20 percent of raw, whole, organic chickens purchased from grocery stores were found to contain Campylobacter bacteria, and 28 percent tested positive for Salmonella. Just 8 percent of raw, whole, nonorganic, conventionally processed chickens from the grocery stores tested positive for Campylobacter and 52 percent of those contained Salmonella.

Research – Safer Spinach – E.coli O157

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University of Illinois scientists have found a way to boost current  industry capabilities when it comes to reducing the number of E. coli 0157:H7 cells that may live undetected on spinach leaves.

“By  combining continuous ultrasound treatment with chlorine washing, we can  reduce the total number of foodborne pathogenic bacteria by over 99.99  percent,” said Hao Feng, a U of I professor of food science and human  nutrition.

Research – Safer Spinach – E.coli O157

Science Daily

University of Illinois scientists have found a way to boost current  industry capabilities when it comes to reducing the number of E. coli 0157:H7 cells that may live undetected on spinach leaves.

“By  combining continuous ultrasound treatment with chlorine washing, we can  reduce the total number of foodborne pathogenic bacteria by over 99.99  percent,” said Hao Feng, a U of I professor of food science and human  nutrition.

According  to Feng, the USDA is looking for proposed technologies that can achieve  a 4 to 6 log reduction in pathogen cells (a 6 log reduction would  achieve a million-fold reduction in pathogenic bacteria). The food  processing industry can now achieve a 1 log or tenfold reduction. In  comparison, the U of I technique yields a 4 log reduction.

 

Research – Biofilms and Salmonella

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Virginia Tech scientists have provided new evidence that biofilms — bacteria that adhere to surfaces and build protective coatings — are at work in the survival of the human pathogen Salmonella.

Researchers affiliated with the Fralin Life Science Institute discovered that in addition to protecting Salmonella from heat-processing and sanitizers such as bleach, biofilms preserve the bacteria in extremely dry conditions, and again when the bacteria are subjected to normal digestive processes. The study is now online in the International Journal of Food Microbiology and will appear in the April issue.