In the news

The FDA announced that Mecox Bay Dairy, LLC, recalled Mecox Sunrise washed-rind Tomme style cheese because it has the potential to be contaminated with Listeria monocytogenes. The cheese was distributed and sold at seven retail locations and one restaurant on Eastern Long Island, NY, and served at one restaurant in Chicago, IL. The product comes in a clear plastic package marked with “Mecox Sunrise” cheese label. As of the date of this release, all affected Mecox Sunrise has been removed from all stores and restaurants. No illnesses have been reported to date in connection with this product. The potential for contamination was noted after routine testing by New York State Agriculture and Markets Division of Milk Control revealed the presence of Listeria monocytogenes in a sample of Mecox Sunrise cheese. @ https://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/mecox-bay-dairy-llc-recalls-mecox-sunrise-cheese-because-possible-health-risk?utm_campaign=Mecox%20Bay%20Dairy%2C%20LLC%20Recalls%20%E2%80%9CMecox%20Sunrise%E2%80%9D%20Cheese%20Because%20of%20Possible%20Health%20Risk&utm_medium=email&utm_source=Eloqua

Hou et al. from China Agricultural University published in Food Control (A microfluidic signal-off biosensor for rapid and sensitive detection of Salmonella using magnetic separation and enzymatic catalysis @ https://www.sciencedirect.com/science/article/pii/S0956713519301550?dgcid=rss_sd_all Food Control 2019, 103: 186-193.) about a rapid and sensitive method for the detection of Salmonella typhimurium using a microfluidic biosensor containing magnetic nanoparticles (MNPs) with catalases. Catalases, are common enzymes found in all living organisms and were used in the biosensor to amplify the biological signal greatly. The MNPs was modified with anti-Salmonella monoclonal antibodies and used to separate and enrich Salmonella from sample background flora. The Salmonella was further reacted with polystyrene microspheres (PSs) modified with anti-Salmonella polyclonal antibodies and catalases. Then, the conjugated bacteria were injected into the capillary in a microfluidic chip and captured by high gradient magnetic field. After washing to remove unbound PSs, hydrogen peroxide was finally injected and catalyzed by the catalases on enzymatic bacteria to produce oxygen gaps in the capillary, leading to an electrical signal. A linear relationship was found between the change of electrical voltage and the concentration of target bacteria from 3.7 × 101 to 3.7 × 106 CFU/mL. The biosensor was able to detect Salmonella as low as 33 CFU/mL within 2 h, and could be further combined with microfluidic to develop a lab-on-a-chip system. In testing using salmonella-spiked milk, the mean recovery was 104.7%.

On April 15, 2019, Jensen Tuna voluntarily recalled frozen ground tuna. The recalled tuna was individually packaged in one-pound bags and sold in 20-pound boxes under lot numbers z266, z271, and z272. Jensen Tuna distributed product to Connecticut, Iowa, Illinois, Minnesota, New York, North Dakota, and Washington, but product could have been redistributed further, reaching additional states. The recall came after 13 people infected with the outbreak strain of Salmonella Newport have been reported from 7 states. In epidemiologic interviews, the CDC said 9 (75%) of 12 people reported eating sushi from a restaurant or grocery store in the days prior to illness. On May 9, 2019, JK Fish from Vietnam was added to Import Alert for fish, allowing the FDA to detain its products without any additional physical sampling or analysis. @ https://www.fda.gov/food/outbreaks-foodborne-illness/outbreak-investigation-salmonella-newport-linked-frozen-ground-tuna?utm_campaign=Outbreak%20Tuna%205_9_2019%20Email&utm_medium=email&utm_source=Eloqua

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