Category Archives: Microbiological Risk Assessment

USA – Investigation of Adverse Event Reports: French Lentil & Leek Crumbles (June 2022)

FDA

The FDA, along with CDC and state and local partners, is investigating consumer complaints of gastrointestinal illness and abnormal liver function that may be attributable to eating Daily Harvest French Lentil & Leek Crumbles frozen product.

On June 17, 2022, in response to consumer complaints submitted to the company, Daily Harvest voluntarily initiated a recall of their French Lentil & Leek Crumbles. In response to Consumer Adverse Event Reports (CAERS) and Consumer Complaints submitted to the FDA, the FDA has initiated an investigation, including an inspection and sample collection in an effort to determine the cause of illnesses. As of June 28, the FDA has received 133 CAERS reports and Consumer Complaints related to this product.

From April 28 to June 17, 2022, approximately 28,000 units of the recalled product were distributed to consumers in the continental United States through online sales and direct delivery, as well as through retail sales at the Daily Harvest store in Chicago, IL, and a “pop-up” store in Los Angeles, CA. Samples were also provided to a small number of consumers.

Daily Harvest emailed consumers who were shipped the affected product, and other consumers for whom the company had contact information and consumers were issued a credit for the recalled product. Consumers who may still have the recalled product in their freezers should immediately dispose of it.

FDA’s investigation is ongoing, and more information will be provided as it becomes available.

Recommendation
Consumers should not eat, sell, or serve recalled products. Consumers who may still have the recalled product in their freezers should throw it away.

Product was sold through online sales and in two retail locations; the Daily Harvest store in Chicago, IL, and a “pop-up” store in Los Angeles, CA. French Lentil + Leek Crumbles is a frozen product packaged in a 12oz white pouch with the words “Daily Harvest” at the top, a large “CRUMBLES” immediately below the top and the words “French Lentil + Leek” in bold, as shown below. All lot codes of the French Lentil + Leek Crumbles are affected. At this time, no other Daily Harvest products are affected or part of this recall.

If you experience symptoms including yellowing of the skin and eyes (jaundice), dark urine, itching with no rash, gastrointestinal illness, nausea, fatigue, body aches, severe abdominal pain and/or fever after consuming this product, please consult with your healthcare provider. Let your healthcare provider know you have recently consumed the recalled Daily Harvest French Lentil & Leek Crumbles. Healthcare providers should report these illnesses to their health department.

Product Images
Daily Harvest French Lentil and Leek Crumbles
Case Counts
Total Adverse Illness Events: 133 *
Hospitalizations: 42 *
Deaths: 0
Last illness onset: June 21, 2022 *
States with Adverse Illness Events: CA, CO, CT, FL, GA, IL, IA, IN, MA, MD, MI, MO, MT, NH, NJ, NY, NC, OH, OR, PA, RI, TN, TX, VA, WA, WI
Product Distribution: Nationwide
* estimate based on consumer complaint and CAERs reports

Useful Links
Recall Announcement
Who to Contact
Who to Contact
Consumers who have symptoms should contact their health care provider to report their symptoms and receive care.

To report a complaint or adverse event (illness or serious allergic reaction), you can

Call an FDA Consumer Complaint Coordinator if you wish to speak directly to a person about your problem.
Complete an electronic Voluntary MedWatch form online.
Complete a paper Voluntary MedWatch form that can be mailed to FDA.

USA – CDC Investigation Notice: CDC Investigates New Listeria Outbreak

CDC

A CDC Investigation Notice regarding a multistate outbreak of Listeria infections has been posted: Listeria Outbreak | CDC.Listeria Outbreak | CDC

Key points:

  • 23 people infected with the outbreak strain have been reported from 10 states. Nearly all the people live in or traveled to Florida about a month before they got sick, although the significance of this is not yet known.
  • 22 people have been hospitalized and one death has been reported from Illinois.
  • Five people got sick during their pregnancy, and one illness resulted in a fetal loss.
  • A specific food item has not yet been identified as the source of this outbreak.
  • Pregnant people and their newborns, adults aged 65 and older, and people with weakened immune systems are at higher risk for severe Listeria
  • CDC is advising people at high risk who have symptoms of a Listeria infection, especially those who have recently traveled to Florida, to talk to their healthcare provider. Healthcare providers should report listeriosis illnesses to their health department. This information may help investigators solve this outbreak.

About Listeria:

  • Listeria can cause severe illness (known as invasive listeriosis) when the bacteria spread beyond the gut to other parts of the body.
  • Pregnant people typically experience only fever, fatigue, and muscle aches. However, Listeria infection during pregnancy can lead to miscarriage, stillbirth, premature delivery, or life-threatening infection of the newborn.
  • People who are not pregnant may experience headache, stiff neck, confusion, loss of balance, and convulsions, in addition to fever and muscle aches.
  • Symptoms of severe illness usually start within two weeks after eating food contaminated with Listeria but may start as early as the same day or as late as 70 days after.

If you have questions about cases in a particular state, please call that state’s health department.

Thank you,

CDC News Media Branch
404-639-3286
media@cdc.gov

Spain – Seven face charges in deadly Listeria outbreak in Spain

Food Safety News

Seven people are set to stand trial as part of Spain’s largest ever Listeria outbreak, which occurred in 2019.

A judge in a court in Seville this week decided to continue proceedings against seven defendants for offences including alleged crimes against public health and injury to a fetus resulting in abortion. At the conclusion of an investigation into the outbreak, Pilar Ordóñez also considered that Seville Council could be held civilly liable, this means it would have to pay compensation if convicted.

The outbreak from “La Mecha” brand chilled roasted pork produced by Magrudis affected almost 250 people. During the health alert between mid-August and mid-October 2019, four people died and there were six abortions.

Those investigated are José Antonio Marín Ponce, administrator of Magrudis; his wife, Encarnación Rodríguez Jiménez, responsible for production and the company’s self-control system; their children Sandro José and Mario Marín Rodríguez as well as a local veterinary inspector and two other people. Action against another four people has been stopped.

Research – Effect of Biltong Dried Beef Processing on the Reduction of Listeria monocytogenes, E. coli O157:H7, and Staphylococcus aureus, and the Contribution of the Major Marinade Components

MDPI

Biltong is a dry beef product that is manufactured without a heat lethality step, raising concerns of whether effective microbial pathogen reduction can occur during biltong processing. Raw beef inoculated with 4-strain cocktails of either E. coli O157:H7, Listeria monocytogenes, or Staphylococcus aureus, and processed with a standard biltong process, were shown to incur a >5-log reduction in 6–8 days after marination by vacuum-tumbling for 30 min in vinegar, salt, spices (coriander, pepper) when dried at 23.9 °C (75 °F) at 55% relative humidity (RH). Pathogenic challenge strains were acid-adapted in media containing 1% glucose to ensure that the process was sufficiently robust to inhibit acid tolerant strains. Internal water activity (Aw) reached < 0.85 at 5-log reduction levels, ensuring that conditions were lower than that which would support bacterial growth, or toxin production by S. aureus should it be internalized during vacuum tumbling. This was further confirmed by ELISA testing for staphylococcal enterotoxins A and B (SEA, SEB) after marination and again after 10 days of drying whereby levels were lower than initial post-marination levels. Comparison of log reduction curves obtained for E. coli O157:H7, L. monocytogenesS. aureus, and Salmonella (prior study) showed that microbial reduction was not significantly different (p < 0.05) demonstrating that even without a heat lethality step, the biltong process we examined produces a safe beef product according to USDA-FSIS guidelines.

Research – Use of Whole Genome Sequencing by the Federal Interagency Collaboration for Genomics for Food and Feed Safety in the United States

Journal of Food Protection

This multiagency report developed by the Interagency Collaboration for Genomics for Food and Feed Safety provides an overview of the use of and transition to whole genome sequencing (WGS) technology for detection and characterization of pathogens transmitted commonly by food and for identification of their sources. We describe foodborne pathogen analysis, investigation, and harmonization efforts among the following federal agencies: National Institutes of Health; Department of Health and Human Services, Centers for Disease Control and Prevention (CDC) and U.S. Food and Drug Administration (FDA); and the U.S. Department of Agriculture, Food Safety and Inspection Service, Agricultural Research Service, and Animal and Plant Health Inspection Service. We describe single nucleotide polymorphism, core-genome, and whole genome multilocus sequence typing data analysis methods as used in the PulseNet (CDC) and GenomeTrakr (FDA) networks, underscoring the complementary nature of the results for linking genetically related foodborne pathogens during outbreak investigations while allowing flexibility to meet the specific needs of Interagency Collaboration partners. We highlight how we apply WGS to pathogen characterization (virulence and antimicrobial resistance profiles) and source attribution efforts and increase transparency by making the sequences and other data publicly available through the National Center for Biotechnology Information. We also highlight the impact of current trends in the use of culture-independent diagnostic tests for human diagnostic testing on analytical approaches related to food safety and what is next for the use of WGS in the area of food safety.

Research – Quantitative Risk Assessment of Vibrio parahaemolyticus in Shellfish from Retail to Consumption in Coastal City of East China 

Journal of Food Protection

Food Illness

Vibrio parahaemolyticus is the main foodborne pathogen of acute gastroenteritis in the world. A quantitative microbiological risk assessment (QMRA) was conducted to evaluate the health risk caused by V. parahaemolyticus in shellfish in the costal cities of east China. The QMRA framework was established from shellfish at retail through cooking at home to consumption. The prevalence and concentration of V. parahaemolyticus in shellfish, cooking methods, storage temperature and time after purchase, shellfish consumption frequency and consumption amount were analyzed in the exposure assessment. The results of the exposure assessment were introduced into the Beta-Poisson dose response model, and Monte Carlo analysis was used to calculate the risk of gastroenteritis caused by shellfish consumption. The results showed that the probability of illness caused by V. parahaemolyticus due to shellfish consumption per person per year (Pill,yr) was 3.49E-05. There were seasonal differences in the Pill/meal, the maximum Pill/meal was 4.81E-06 in summer, and the minimum Pill/meal was 2.27E-07 in winter. The sensitivity analysis showed that the concentration of V. parahaemolyticus in shellfish and the consumption per meal were main factors contributing to the illness. This QMRA provided valuable information such as the probability of illness associated with the consumption of shellfish and it also provided references for prevention strategies and control standards of V. parahaemolyticus in shellfish.

Research – Biofilm Formation of Listeria monocytogenes and Pseudomonas aeruginosa in a Simulated Chicken Processing Environment

MDPI

This study aims to investigate the mono- and dual-species biofilm formation of Listeria monocytogenes and Pseudomonas aeruginosa incubated in different culture mediums, inoculum ratios, and incubation time. The planktonic cell population and motility were examined to understand the correlation with biofilm formation. The results showed that chicken juice significantly inhibited the biofilm formation of L. monocytogenes (p < 0.05). Pseudomonas aeruginosa was the dominant bacteria in the dual-species biofilm formation in the trypticase soy broth medium. The dynamic changes in biofilm formation were not consistent with the different culture conditions. The growth of planktonic L. monocytogenes and P. aeruginosa in the suspension was inconsistent with their growth in the biofilms. There was no significant correlation between motility and biofilm formation of L. monocytogenes and P. aeruginosa. Moreover, scanning electron microscopy (SEM) results revealed that the biofilm structure of L. monocytogenes was loose. At the same time, P. aeruginosa formed a relatively dense network in mono-species biofilms in an initial adhesion stage (24 h). SEM results also showed that P. aeruginosa was dominant in the dual-species biofilms. Overall, these results could provide a theoretical reference for preventing and controlling the biofilm formation of L. monocytogenes and P. aeruginosa in the food processing environment in the future. View Full-Text

Research – Impact of Industrial Practices on the Microbial and Quality Attributes of Fresh Vacuum-Packed Lamb Joints

MDPI

The impact of different industrial practices at lamb export abattoirs in Ireland on the microbial and quality attributes of fresh vacuum-packed (VP) lamb leg joints, including Clean Livestock Policy (CLP), fleece clipping, carcass chilling times and vacuum pack storage, at typical chill and retail display temperatures was investigated. Five separate slaughter batches of lamb (ranging in size from 38 to 60 lambs) were followed at two lamb export plants over a two-year period, accounting for seasonal variation. In general, fleece clipping resulted in significantly lower microbial contamination on the fleece than the use of CLP alone. Lamb from carcasses chilled for 24 h had significantly lower psychrophilic total viable counts and Brochothrix thermosphacta and pseudomonad counts than carcasses chilled for 72 h. Following vacuum-packed (VP) storage of meat from these carcasses at 1.7 ± 1.6 °C for 23 days in the meat plant followed by retail display at 3.9 ± 1.7 °C (up to day 50), the dominant microorganisms were lactic acid bacteria, Br. thermosphacta, Enterobacteriaceae and pseudomonads, and all had reached maximum population density by storage day 34. Aligned with this, after day 34, the quality of the raw meat samples also continued to deteriorate, with off-odours and colour changes developing. While the mean values for cooked meat eating quality attributes did not change significantly over the VP storage period, high variability in many attributes, including off-flavours and off-odours, were noted for lamb meat from all storage times, highlighting inconsistences in lamb quality within and between slaughter batches. View Full-Text

Research – Listeria monocytogenes in Irrigation Water: An Assessment of Outbreaks, Sources, Prevalence, and Persistence

MDPI

As more fresh fruits and vegetables are needed to meet the demands of a growing population, growers may need to start depending on more varied sources of water, including environmental, recycled, and reclaimed waters. Some of these sources might be susceptible to contamination with microbial pathogens, such as Listeria monocytogenes. Surveys have found this pathogen in water, soil, vegetation, and farm animal faeces around the world. The frequency at which this pathogen is present in water sources is dependent on multiple factors, including the season, surrounding land use, presence of animals, and physicochemical water parameters. Understanding the survival duration of L. monocytogenes in specific water sources is important, but studies are limited concerning this environment and the impact of these highly variable factors. Understanding the pathogen’s ability to remain infectious is key to understanding how L. monocytogenes impacts produce outbreaks and, ultimately, consumers’ health. View Full-Text

Research – Growth inhibition of Listeria monocytogenes in fresh white cheese by mustard oil microemulsion

Journal of Food Protection

Although essential oils (EOs) exhibit antimicrobial properties, its application is limited owing to their strong volatility and poor water solubility. Emulsification is a valid strategy for improving chemical stability. In this study, we prepared a mustard essential oil (MO) emulsion with egg yolk lecithin and evaluated its antimicrobial activity against Listeria monocytogenes in vitro and in cheese curd. The particle size of the MO emulsion was approximately 0.19 µmand remained stable for 30 days of storage. The MO emulsion showed strong antimicrobial activity against L. monocytogenes in vitro. Moreover, 40 ppm of MO was sufficient to inhibit the growth of L. monocytogenes in culture, and the addition of 160 ppm MO decreased the population of L. monocytogenes. Meanwhile, when 50 ppm of emulsified MO was added to milk during cheese curd production and it was stored at 10°C for 10 days, the growth of L. monocytogenes was suppressed. When the cheese curd with MO emulsion was stored at 4 °C, the bacterial count was significantly decreased (p<0.05), and no bacterial growth was observed after 14 days of storage. Furthermore, the sensory characteristics of cheese curd with the MO emulsion were acceptable. These results indicate that MO emulsions may be a possible way of controlling the growth of L. monocytogenes in fresh cheese.