Tag Archives: sanitizing

Raj Rajagopal, 3M Food Safety
In the Food Lab

Pathogen Detection Guidance in 2020

By Raj Rajagopal
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Raj Rajagopal, 3M Food Safety

Food production managers have a critical role in ensuring that the products they make are safe and uncontaminated with dangerous pathogens. Health and wellness are in sharp focus for consumers in every aspect of their lives right now, and food safety is no exception. As food safety becomes a continually greater focus for consumers and regulators, the technologies used to monitor for and detect pathogens in a production plant have become more advanced.

It’s no secret that pathogen testing is performed for numerous reasons: To confirm the adequacy of processing control and to ensure foods and beverages have been properly stored or cooked, to name some. Accomplishing these objectives can be very different, and depending on their situations, processors rely on different tools to provide varying degrees of testing simplicity, speed, cost, efficiency and accuracy. It’s common today to leverage multiple pathogen diagnostics, ranging from traditional culture-based methods to molecular technologies.

And unfortunately, pathogen detection is more than just subjecting finished products to examination. It’s become increasingly clear to the industry that the environment in which food is processed can cross-contaminate products, requiring food manufacturers to be ever-vigilant in cleaning, sanitizing, sampling and testing their sites.

For these reasons and others, it’s important to have an understanding and appreciation for the newer tests and techniques used in the fight against deadly pathogens, and where and how they might be fit for purpose throughout the operation. This article sheds light on the key features of one fast-growing DNA-based technology that detects pathogens and explains how culture methods for index and indicator organisms continue to play crucial roles in executing broad-based pathogen management programs.

LAMP’s Emergence in Molecular Pathogen Detection

Molecular pathogen detection has been a staple technology for food producers since the adoption of polymerase chain reaction (PCR) tests decades ago. However, the USDA FSIS revised its Microbiology Laboratory Guidebook, the official guide to the preferred methods the agency uses when testing samples collected from audits and inspections, last year to include new technologies that utilize loop-mediated isothermal amplification (LAMP) methods for Salmonella and Listeria detection.

LAMP methods differ from traditional PCR-based testing methods in four noteworthy ways.

First, LAMP eliminates the need for thermal cycling. Fundamentally, PCR tests require thermocyclers with the ability to alter the temperature of a sample to facilitate the PCR. The thermocyclers used for real-time PCR tests that allow detection in closed tubes can be expensive and include multiple moving parts that require regular maintenance and calibration. For every food, beverage or environmental surface sample tested, PCR systems will undergo multiple cycles of heating up to 95oC to break open DNA strands and cooling down to 60oC to extend the new DNA chain in every cycle. All of these temperature variations generally require more run time and the enzyme, Taq polymerase, used in PCR can be subjected to interferences from other inhibiting substances that are native to a sample and co-extracted with the DNA.

LAMP amplifies DNA isothermally at a steady and stable temperature range—right around 60oC. The Bst polymerase allows continuous amplification and better tolerates the sample matrix inhibitors known to trip up PCR. The detection schemes used for LAMP detection frees LAMP’s instrumentation from the constraints of numerous moving pieces.

Secondly, it doubles the number of DNA primers. Traditional PCR tests recognize two separate regions of the target genetic material. They rely on two primers to anneal to the subject’s separated DNA strands and copy and amplify that target DNA.

By contrast, LAMP technology uses four to six primers, which can recognize six to eight distinct regions from the sample’s DNA. These primers and polymerase used not only cause the DNA strand to displace, they actually loop the end of the strands together before initiating amplification cycling. This unique looped structure both accelerates the reaction and increases test result sensitivity by allowing for an exponential accumulation of target DNA.

Third of all, it removes steps from the workflow. Before any genetic amplification can happen, technicians must enrich their samples to deliberately grow microorganisms to detectable levels. Technicians using PCR tests have to pre-dispense lysis buffers or reagent mixes and take other careful actions to extract and purify their DNA samples.

Commercialized LAMP assay kits, on the other hand, offer more of a ready-to-use approach as they offer ready to use lysis buffer and simplified workflow to prepare DNA samples. By only requiring two transfer steps, it can significantly reduces the risk of false negatives caused by erroneous laboratory preparation.

Finally, it simplifies multiple test protocols into one. Food safety lab professionals using PCR technology have historically been required to perform different test protocols for each individual pathogen, whether that be Salmonella, Listeria, E. coli O157:H7 or other. Not surprisingly, this can increase the chances of error. Oftentimes, labs are resource-challenged and pressure-packed environments. Having to keep multiple testing steps straight all of the time has proven to be a recipe for trouble.

LAMP brings the benefit of a single assay protocol for testing all pathogens, enabling technicians to use the same protocol for all pathogen tests. This streamlined workflow involving minimal steps simplifies the process and reduces risk of human-caused error.

Index and Indicator Testing

LAMP technology has streamlined and advanced pathogen detection, but it’s impractical and unfeasible for producers to molecularly test every single product they produce and every nook and cranny in their production environments. Here is where an increasing number of companies are utilizing index and indicator tests as part of more comprehensive pathogen environmental programs. Rather than testing for specific pathogenic organisms, these tools give a microbiological warning sign that conditions may be breeding undesirable food safety or quality outcomes.

Index tests are culture-based tests that detect microorganisms whose presence (or detection above a threshold) suggest an increased risk for the presence of an ecologically similar pathogen. Listeria spp. Is the best-known index organism, as its presence can also mark the presence of deadly pathogen Listeria monocytogenes. However, there is considerable skepticism among many in the research community if there are any organisms outside of Listeria spp. that can be given this classification.

Indicator tests, on the other hand, detect the presence of organisms reflecting the general microbiological condition of a food or the environment. The presence of indicator organisms can not provide any information on the potential presence or absence of a specific pathogen or an assessment of potential public health risk, but their levels above acceptable limits can indicate insufficient cleaning and sanitation or operating conditions.

Should indicator test results exceed the established control limits, facilities are expected to take appropriate corrective action and to document the actions taken and results obtained. Utilizing cost-effective, fast indicator tests as benchmark to catch and identify problem areas can suggest that more precise, molecular methods need to be used to verify that the products are uncontaminated.

Process Matters

As discussed, technology plays a large role in pathogen detection, and advances like LAMP molecular detection methods combined with strategic use of index and indicator tests can provide food producers with powerful tools to safeguard their consumers from foodborne illnesses. However, whether a producer is testing environmental samples, ingredients or finished product, a test is only as useful as the comprehensive pathogen management plan around it.

The entire food industry is striving to meet the highest safety standards and the best course of action is to adopt a solution that combines the best technologies available with best practices in terms of processes as well –from sample collection and preparation to monitoring and detection.

Coronavirus, COVID-19

Worker Safety a Concern as COVID-19 Affects U.S. Meat Plants, Supply Chain Uncertain

By Maria Fontanazza
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Coronavirus, COVID-19

Employees at meat processing plants across the nation aren’t reporting to work as they fear for their health during the coronavirus pandemic. Hundreds of workers have become infected with COVID-19, and several deaths have been reported. There is no official count on the infection rate or how many employees have succumbed to the novel coronavirus, but the information released thus far is alarming. Demands for more protective equipment, along with hazard pay, may not be enough to keep workers safe; concerns over a meat shortage loom.

Tyson Foods

On March 31, Tyson Foods posted on “The Feed Blog” (the company’s blog) that it would be taking additional measures to protect and reward its frontline workers and truckers during the COVID-19 crisis: Protection in the form of “protective facial coverings for production workers who request them” and a reward in the form of a “one-time $500 bonus” to be paid the first week in July “based on their work attendance in accordance with our relaxed COVID-19 attendance policy during the months of April, May and June”.

Last week Tyson Foods issued a news release about the steps it is taking to further handle the COVID-19 problem at U.S. plants: At all facilities, workers are having their temperatures taken (temporal thermometers or infrared temperature scanners, depending on the location) prior to entering the plants; the company has increased deep cleaning and sanitizing, some of which will require the shutdown of at least one day of production. The release also states that Tyson Foods is implementing more social distancing measures, which includes putting up dividers between workstations and increasing space between workers on the plant floor.

The company’s measures come among serious concerns about the presence of outbreaks at various facilities. The New York Times reported about the deaths of three workers at a Tyson poultry plant in Camilla, Georgia, one of whom was allegedly told to return to work even after feeling symptoms of COVID-19. In Columbus Junction, Iowa, a Tyson pork plant closed after more than 24 employees tested positive for COVID-19. And according to the Benton-Franklin (Washington state) health district COVID-19 Case Count page, 30 people linked to the Tyson Fresh Meats plant have been diagnosed with the coronavirus as of April 13.

Cargill, Inc.

Last week Cargill closed a meat production facility in Hazleton, PA due to the high concentration of COVID-19 cases in the area. The facility has 900 employees, and it has been reported that some workers were staying home as a result of testing positive for coronavirus or out of concerns for their own safety.

JBS

JBS shut down its plant in Pennsylvania for two weeks; it shuttered its beef plant in Greeley, Colorado after at least 36 employees tested positive for the virus, and at least one death was reported. One representative for union workers stated 50 employees have tested positive and an additional worker has died. JBS issued a statement on Friday that it is offering free COVID-19 tests to all workers at the Greeley beef plant. The company also lists its policy on prioritizing team member health and safety on its website.

Smithfield Foods, Inc.

Smithfield Foods is the world’s largest pork processing company, employing 40,000 people in the United States. The company shut down its plant in Sioux Falls, SD indefinitely after more than 80 workers tested positive for COVID-19 (this particular accounts for 4–5% of pork production domestically and employs an estimated 3700 workers). “The closure of this facility, combined with a growing list of other protein plants that have shuttered across our industry, is pushing our country perilously close to the edge in terms of our meat supply,” said Kenneth M. Sullivan, president and CEO of Smithfield Foods in a news release. “It is impossible to keep our grocery stores stocked if our plants are not running. These facility closures will also have severe, perhaps disastrous, repercussions for many in the supply chain, first and foremost our nation’s livestock farmers.”

Several Smithfield Food workers in poultry plants across Alabama, Georgia and Tennessee have also tested positive for the virus.

“We have a stark choice as a nation: we are either going to produce food or not, even in the face of COVID-19,” said Sullivan.

Angelica Grindle, DEKRA

Four Steps for Utilizing Behavioral Science to Control Exposure to COVID-19

By Angelica Grindle, Ph.D.
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Angelica Grindle, DEKRA

Safety is defined as controlling exposure for self and others. Going into 2020, the food industry battled safety concerns such as slips and falls, knife cuts, soft-tissue injuries, etc. As an “essential industry”, food-related organizations now face a unique challenge in controlling exposure to COVID-19. Not only must they keep their facilities clean and employees safe, they must also ensure they do not create additional exposures for their suppliers or customers.

These challenges increase at a time when employees may be distracted by stress, financial uncertainties, job insecurity, and worry for themselves and their families. Additionally, facilities may be understaffed, employees may be doing tasks they do not normally do, and we have swelling populations working from home.

While there is much we cannot control with COVID-19, there are specific behaviors that will reduce the risk of viral exposure for ourselves, our co-workers, and our communities. Decades of research show the power of behavioral science in increasing the consistency of safe behaviors. The spread of COVID-19 serves as an important reminder of what food-related organizations can gain by incorporating a behavioral component into a comprehensive exposure-reduction process.

Whether you have an existing behavior based safety process or not, follow these four steps.

Step 1: Pinpoint Critical COVID-19 Exposure Reduction Behaviors

It is critical to clearly pinpoint the behaviors you want to see occurring at a high rate. In the food industry, an organization must control exposure both within their facilities as well as during interactions with suppliers and customers. Controlling exposure within facilities will typically include those behaviors recommended by the CDC such as:

  1. Maintain six feet of separation at all times possible.
  2. Avoid touching your eyes, nose and mouth with unwashed hands.
  3. Minimize personal interactions to reduce exposure to transmit or receive pathogens.
  4. Frequent 20-second hand washing with soap and warm water.
  5. Make hand disinfectant available.
  6. Use alternatives to shaking hands.
  7. Frequently clean and disinfect common areas, such as meeting rooms, bathrooms, doorknobs, countertops, railings, and light switches.
  8. Sneeze and/or cough into elbow or use a tissue and immediately discard.
  9. Conduct meetings via conferencing rather than in person.
  10.  If you are sick, stay home.
  11. If exposed to COVID-19, self-quarantine for precaution and protection of others.

Supplier/Customer exposure-reduction behaviors will vary depending upon your specific industry and may include pinpointing the critical behaviors for food preparation, loading dock delivery, customer home delivery, and customer pick up. When creating checklists to meet your unique exposures, be sure the behaviors you pinpoint are:

  • Measurable: The behavior can be counted or quantified.
  • Observable: The behavior can be seen or heard by an observer.
  • Reliable: Two or more people agree that they observed the same thing.
  • Active: If a dead man can do it, it is not behavior.
  • Influenceable: Under the control of the performer.

Once you have drafted your checklists, ask yourself, “If everyone in my facility did all of these behaviors all the time, would we be certain that we were controlling exposure for each other, our suppliers, and our customers?” If yes, test your checklists for ease of use and clarity.

Step 2: Develop Your Observation Process

To do this, you will want to ask yourself:

  • Who? Who will do observations? Can we leverage observer expertise from an existing process and have them focus on COVID-19 exposure reduction behaviors or should we create a new observer team?
  • Where? Which specific locations, job types, and/or tasks should be monitored?
  • When? When will observers conduct observations?
  • Data: How will you manage the data obtained during the observations so that it can be used to identify obstacles to safe performance? Can the checklist items be entered into an existing database or will we need to create something new?
  • Communication: What information needs to be communicated before we begin our COVID-19 Exposure Reduction process and over time? How will we communicate it?

Step 3: Conduct Your Observations and Provide Feedback

Starting the Observation
Your observers should explain that they are there to help reduce exposure to COVID-19 by providing feedback on performance.

Recording the Observation
Observers should note on the checklist which behaviors are occurring in a safe manner (protected) and which are increasing exposure to COVID-19 (exposed).

Provide Feedback
Feedback is given in the spirit of reducing exposure. It should be given as soon as possible after the observation to reinforce protected behaviors and give the person to opportunity to modify exposed behaviors.

Success Feedback
Success feedback helps reinforce the behaviors you want occurring consistently. Effective success feedback includes:

  • Context: The situation in which the behavior occurred.
  • Action: The specific behaviors observed which reduce exposure to COVID-19.
  • Result: The impact of those behaviors on themselves or others—in this case, reduced COVID-19 exposure for themselves, their families and community.

“I care about your safety and do not want to see you exposed to COVID-19. I saw you use hand sanitizer prior to putting on eye protection. By doing that, you reduced the likelihood of transferring anything that might have been on your hands to your face which keeps you safe from contracting COVID-19.”

Guidance Feedback

Guidance feedback is given for exposed behaviors to transform that behavior into a protected one. Effective guidance feedback includes Context, Action, Result, but also:

  • Alternative Action: The behavior that would have reduced their exposure to COVID-19.
  • Alternative Result: The impact of that alternative behavior, such as reduced COVID-19 exposure for themselves, their families, and community.

“I care about your safety and do not want to see you exposed to COVID-19. I saw that you touched your face while putting on eye protection. By doing that, you increased the likelihood of transferring anything on your hand to your face which increases your risk of exposure to COVID-19. What could you have done to reduce that exposure?”

When giving guidance feedback, it is important to have a meaningful conversation about what prevented them from doing the safe alternative. Note these obstacles on the checklist.

Step 4: Use Your Data to Remove Obstacles to Safe Practices.

Create a COVID-19 exposure reduction team to analyze observation data. This team will identify systemic or organizational obstacles to safe behavior and develop plans to remove those obstacles. This is critical! When an organization knows that many people are doing the same exposed behavior, it is imperative that they not blame the employees but instead analyze what is going on in the organization that may inadvertently be encouraging these at-risk behaviors.

For example, we know handwashing and/or sanitizing is an important COVID-19 exposure reduction behavior. However, if your employees do not have access to sinks or hand sanitizer, it is not possible for them to reduce their exposure.
Similarly, the CDC recommends that people who are sick not come to work. However, if your organization does not have an adequate sick leave policy, people will come to work sick and expose their co-workers, customers and suppliers to their illness.

Your COVID-19 exposure reduction team should develop plans to remove obstacles to safe behavior using the hierarchy of controls.

Conclusion

Consistently executing critical behaviors is key to reducing exposure to COVID-19 as flattening the curve is imperative in the worldwide fight against this pandemic. Regardless of the type of behavior or the outcome that the behavior impacts, Behavior based safety systems work by providing feedback during the observations and then using the information obtained during the feedback conversation to remove obstacles to safe practices.

By using these tips, you can add a proven and powerful tool to your arsenal in the fight against COVID-19 and help keep your employees, their families, and your community safe.

Maria Fontanazza, Food Safety Tech
From the Editor’s Desk

COVID-19 in the Food Industry: So Many Questions

By Maria Fontanazza
1 Comment
Maria Fontanazza, Food Safety Tech

Industries across the global are reeling from the COVID-19 crisis. Although we are clearly not in a state of “business as usual”, the food industry is essential. And as this entire industry must continue to move forward in its duty to provide safe, quality food products, so many questions remain. These questions include: Should I test my employees for fever before allowing them into the manufacturing facility? What do we do if an employee tests positive for COVID-19? How can the company continue safe production? Should we sanitize between shifts on the production line? Should employees on the production floor wear face masks and shields? At what temperature can the virus be killed? The list truly goes on. We saw it ourselves during the first Food Safety Tech webinar last week, “COVID-19 in the Food Industry: Protecting Your Employees and Consumers” (you can register and listen to the recording here). Amidst their incredibly busy schedules, we were lucky to be graced with the presence and expertise of Shawn Stevens (food safety lawyer, Food Industry Counsel, LLC), April Bishop (senior director of food safety, TreeHouse Foods, Inc. and Jennifer McEntire, Ph.D. (vice president of food safety, United Fresh Produce Association) for this virtual event.

From a manufacturing point of view, we learned about the important ways companies can protect their employees—via thorough cleaning of high-touch areas, vigilance with CDC-recommended sanitizers, conducting risk assessments related to social distancing and employees in the production environment—along with the “what if’s” related to employees who test positive for COVID-19. Although FDA has made it clear that there is currently no indication of human transmission of the SARS-CoV-2 virus through food or food packaging, some folks are concerned about this issue as well.

“The U.S. food supply remains safe for both people and animals. There is no evidence of human or animal food or food packaging being associated with transmission of the coronavirus that causes COVID-19,” said Frank Yiannas, FDA deputy commissioner for food policy and response in the agency’s blog last week. “Unlike foodborne gastrointestinal viruses like norovirus and hepatitis A that make people ill through contaminated food, SARS-CoV-2, which causes COVID-19, is a virus that causes respiratory illness. This virus is thought to spread mainly from person to person. Foodborne exposure to this virus is not known to be a route of transmission.”

As the industry continues to adjust to this new and uncertain environment, we at Food Safety Tech are working to keep you in touch with experts who can share best practices and answer your questions. I encourage you to join us on Thursday, April 2 for our second webinar in this series that I referenced earlier, COVID-19 in the Food Industry: Enterprise Risk Management and the Supply Chain. We will be joined by Melanie Neumann, executive vice president & general counsel for Matrix Sciences International, Inc. and Martin Wiedmann, Ph.D., Gellert Family Professor in Food Safety at Cornell University, and the event promises to reveal more important information about how we can work through this crisis together.

We hear it often in our industry: “Food safety is not a competitive advantage.” This phrase has never been more true.

Stay safe, stay well, and thank you for all that you do.

Steven Sklare, Food Safety Academy
Retail Food Safety Forum

Ring, Ring, Ring: COVID-19? Beware Your Filthy Cell Phone

By Steven Sklare
2 Comments
Steven Sklare, Food Safety Academy

During the COVID-19 pandemic, the rest of the world has embraced one of the well-known mantras of the food safety profession: Wash your hands, wash your hands, wash your hands. It is equally urgent that we expand that call to arms (or hands) a bit to include: Sanitize your cell phone, sanitize your cell phone, sanitize your cell phone.

A typical cell phone has approximately 25,000 germs per square inch compared to a toilet seat, which has approximately 1200 germs per square inch, a pet bowl with approximately 2100 germs per square inch, a doorknob with 8600 germs per square inch and a check-out screen with approximately 4500 germs per square inch.

Back in the day, when restaurants were still open for a sit-down, dining room meal, during a visit to an upscale Chicago restaurant I had the need to use the restroom. As I left the restroom, an employee, in kitchen whites, walked into the restroom with his cell phone in his hand. It hit me like a bolt of gastrointestinal pain. Even if the employee properly washed his hands, that cell phone with its 25,000 germs per square (and some new fecal material added for good measure) would soon be back in the kitchen. Today, we can add COVID-19 to the long list of potentially dangerous microbes on that cell phone, if the owner of the phone is COVID-19 positive. We also know that the virus can be transferred through the air if someone is COVID-19 positive or has come in close proximity to the surface of a cell phone. As we know, many kitchens are still operating, if only to provide carryout or delivery service. Even though we are not treating COVID-19 as a foodborne illness, great concern remains regarding the transfer of pathogens to the face of the cell phone user, whether it is the owner of the cell phone or someone else who is using it. Just as there are individuals that are asymptomatic carriers of foodborne illness (i.e., Typhoid Mary), we know that there are COVID-19 positive individuals that are either asymptomatic or presenting as a cold or mild flu. These individuals are still highly contagious and the people that may pick-up the virus from them may have a more severe response to the illness.

A recent study from the UK found that 92% of mobile phones had bacterial contamination and one in six had fecal matter. This study was conducted, of course, before the current COVID-19 pandemic. However, consider that the primary form of transfer of the COVID-19 pathogen is from sneezing or coughing. This makes the placement of the virus on the cell phone easier to accomplish than the fecal-oral route because even if the individual recently washed their hands, if they sneeze or cough on their phone, their clean hands are irrelevant.

I also know there is no widely established protocol, for the foodservice industry, food manufacturing industry, sanitizing/cleaning industry, housekeeping, etc., for cleaning and sanitizing a cell phone while on the job. For example, if you examine a dozen foodservice industry standard lists of “when you should wash your hands” you will always see included in the list, “after using the phone”. However, that is usually referring to a wall mounted or desktop land line phone. What about the mobile phone that goes into the food handler’s pocket, loaded with potentially disease-causing germs? I have certainly witnessed a food handler set a cell phone down on a counter, then carefully wash his/her hands at a hand sink, dry their hands and then pick-up their filthy cell phone and either put it in their pocket, make a call or send a text message. What applies to the “food handler” also applies to those individuals on the job cleaning and sanitizing food contact surfaces, and other surfaces that many people will come in direct contact with such as handrails, doorknobs sink handles, and so on.

How can the pathogen count for a cell phone be so high compared to other items you would assume would be loaded with germs? The high number cited for a cell phone is accumulative. How often do you clean your cell phone (or for that matter your keyboard or touch screen)? I’ll bet not very often, if ever. In addition, a frequently used cell phone remains warm and with just a small amount of food debris (even if not visible to the naked eye) creates an ideal breeding environment for bacteria. Unlike bacteria, we know that viruses do not reproduce outside of a cell. The cell phone still presents an excellent staging area for the COVID-19 virus while it waits to be transferred to someone’s face or nose.

While there have been some studies conducted on mobile phone contamination and the food industry, most of the statistics we have come from studies conducted in the healthcare industry involving healthcare workers. If anything, we would hope the hygiene practices in the healthcare environment to be better (or at least as good) as the foodservice industry. It is not a pretty picture. In reviewing various studies, I consistently saw results of the following: 100% contamination of mobile phone surfaces; 94.5% of phones demonstrated evidence of bacterial contamination with different types of bacteria; 82% and so on.

Let’s state the obvious: A mobile phone, contaminated with 1000’s of potentially disease causing germs, acts as a reservoir of pathogens available to be transferred from the surface of the phone to a food contact surface or directly to food and must be considered a viable source of foodborne illness. As we stated earlier, we are not treating COVID-19 as a foodborne illness, but we cannot ignore the role that a cell phone could play in transferring and keeping in play this dangerous pathogen.

What do we do about it? Fortunately we can look to the healthcare industry for some guidance and adapt to the foodservice industry, some of the recommendations that have come from healthcare industry studies.

Some steps would include the following:

  1. Education and training to increase awareness about the potential risks associated with mobile phones contaminated with pathogens.
  2. Establish clear protocols that specifically apply to the use of and presence of mobile phones in the foodservice operation.
  3. Establish that items, inclusive of mobile phones, that cannot be properly cleaned and sanitized should not be used or present where the contamination of food can occur or …
  4. If an item, inclusive of a mobile phone, cannot be properly cleaned and sanitized, it must be encased in a “cover” that can be cleaned and sanitized.
  5. The “user” of the mobile phone must be held accountable for the proper cleaning and sanitizing of the device (or its acceptable cover).

It’s safe to assume the mobile phone is not going to go away. We must make sure that it remains a tool to help us better manage our lives and communication, and does not become a vehicle for the transfer of foodborne illness causing pathogens or COVID-19.

Gina Kramer
Food Safety Think Tank

Technology Enables More Effective Handwashing

By Gina R. Nicholson-Kramer
2 Comments
Gina Kramer

At the 2016 Food Safety Consortium, Gina Kramer will be moderating the Listeria Detection & Control Workshop | December 7–8 | Schaumburg, IL | LEARN MOREOn October 15, Global Handwashing Day was observed by millions of people in more than 100 countries. The point of the day is to heighten awareness around the importance of handwashing, which is a critical part of preventing sickness and spreading germs.

sanitimer
The SaniTimer

As food safety professionals, proper handwashing is a critical part of prevention as well.  Ensuring that employees understand and execute on the practice is essential to preventing product contamination and protecting consumers.

I would like to introduce you to a new handwashing tool for the food industry, the SaniTimer. A chef who is passionate about food safety performance by food employees developed this innovation. I love this new product and its practical application to food safety and public health in assisting in proper food employee behavior.

I encourage you to watch the video, and please share your thoughts about the technology.

Sponges, environmental sampling

Mitigate the Risk: Importance of Environmental Sampling in an Environmental Monitoring Program

By Gabriela Martinez, Ph.D.
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Sponges, environmental sampling

There are several ways in which pathogens can enter a food processing facility. Once inside, pathogens are either temporary visitors that are removed using cleaning and disinfection methods, or they can persist in sites such the floor or drains and require a more intense remediation process. As food processors take on the responsibility to prevent product adulteration in facilities, setting up and maintaining an environmental monitoring program (EMP) is critical.  An effective EMP helps a company manage and potentially reduce operational, regulatory and branding reputation risks.

Establishing an EMP begins with identifying and documenting potential pathogen sources in all physical areas (including raw materials, storage and shipping areas) and cross-contamination vectors (employees, equipment, pests, etc.). These areas and vectors should be surveyed, controlled and when possible, eliminated. Implementing effective controls, including microbiological sampling of high-risk areas, should be part of the program. Sampling for pathogens or indicator microorganisms  in food contact areas during production is also important. Additionally, the EMP elevates the awareness of what is happening in the plant environment and helps companies measure the efficiency of their pathogen-prevention program—for example, it is not only critical to test for pathogens, but also for the overall effectiveness of cleaning and sanitizing procedures. Both procedures are necessary and must be properly executed to reduce microorganisms to safe levels. The goal of a cleaning process is to remove completely food and other types of soil from a surface. Since soils vary widely in composition, no single detergent is capable of removing all types. In general, acid cleaners dissolve alkaline soils (minerals) and alkaline cleaners dissolve acid soils and food wastes. It is for this reason that the employees involved must understand the nature of the soil to be removed before selecting a detergent or a cleaning regime. The cleaner must also match with the water properties and be compatible (i.e., not corrosive) with the surface characteristics on which it will be applied. However, not only the correct choice of agent is necessary for an optimal result; it should be coupled with a mechanical action, an appropriated contact time and correct operating temperature. As the combination of these parameters is characteristic to each process, it becomes essential to verify effectiveness through sampling. Finally, cleaning is closely related to sanitation, because it can’t be sanitized what hasn’t been previously cleaned.

“Not Your Grandfather’s Environmental Monitoring Program Anymore”: Learn more about this important topic at the 2016 Food Safety Consortium | EVENT WEBSITE

The Association of Official Analytical Chemists defines sanitizing for food product contact surfaces as a process that reduces the contamination level by 99.999% (5 logs). Sanitation may be achieved using either heat (thermal treatment) or chemicals. Hot water sanitizing is commonly used where immersing the contact surfaces is practical (e.g., small parts, utensils). Hot water sanitizing is effective only when appropriate temperatures can be maintained for the appropriate period of time. For example, depending on the application, sanitation may be achieved by immersing parts or utensils in water at 770 C to 850 C for 45 seconds to five minutes. The advantages of this method include easy application, availability, effective for a broad range of microorganisms, non-corrosive, and it penetrates cracks and crevices. However, the process is relatively slow, can contribute to high energy costs, may contribute to the formation of biofilms and may shorten the life of certain equipment parts (e.g., seals and gaskets). Furthermore, fungal spores can survive this treatment.

Regarding chemicals, there is no perfect chemical sanitizer. Performance depends on sanitizer concentration (too low or too high is ineffective), contact exposure time, temperature of the sanitizing solution (generally, 210 C to 380 C is considered optimal), pH of the water solution (each sanitizer has an optimal pH), water hardness, and surface cleanliness. Some chemical sanitizers, such as chlorine, react with food and soil, becoming less effective on surfaces that have not been properly cleaned.

The effectiveness of a plant’s sanitation practices must be verified to ensure that the production equipment and environment are sanitary. Operators employ several methods of verification, including physical and visual inspection, as part of ongoing environmental hygiene monitoring programs. Portable ATP bioluminescence systems are widely used to obtain immediate results about the sanitary or unsanitary condition of food plant surfaces. ATP results should be followed up with more in-depth confirmation testing, such as indirect indicator tests and pathogen-specific tests. Indirect indicator tests are based on non-pathogenic microorganisms (i.e., coliform, fecal coliforms or total counts) that may be naturally present in food or in the same environment as a pathogen. These indicator organisms are used to assess the overall sanitation or environmental condition that may indicate the presence of pathogens. The principal advantages of using indicator organisms in an EMP include:

  • Detection techniques are less expensive compared to those used for pathogens
  • Indicator microorganisms are present in high numbers and a baseline can be easily established
  • Indicator microorganisms are a valid representative of pathogens of concern since they survive under similar physical, chemical and nutrient conditions as the pathogen

However, indicator organisms are not a substitute for pathogen testing. A positive result indicates possible contamination and a risk of foodborne disease. It is recommended that samples be taken immediately before production starts, just after cleaning and sanitation have been completed when information regarding cleaning and sanitation are required. However, when sampling is conducted on surfaces previously exposed to chemical germicide treatment, appropriate neutralizers must be incorporated into the medium to preserve viability of the microbial cells.

Neutralizers recommended for food plant monitoring include Dey-Engley neutralizing broth (DE), neutralizing buffer (NE), Buffered peptone water (BPW) and Letheen broth (LT) (see Table I). Most of these are incorporated into a support such as a sponge, swab or chiffon to neutralize the residues of cleaning agents and sanitizers that may be picked up during swabbing. The product should be selected based on the surface, the type of cleaning agents and the type of testing (qualitative or quantitative).

Neutralizing agents, Environmental sampling
Table I. Neutralizing agents

It is critical to verify that the chosen neutralizer has an efficient action against the used sanitizers. Table I show the most effective equivalence among the cleaning agents and the most common neutralizers.

For instance, if a quantitative method is to be used, it is very important to consider a neutralizing agent, such as the neutralizing buffer, that doesn’t support the bacterial growth.

Finally the sponge is a very popular choice due to its versatility. Sponges are used for sampling equipment surfaces, floors, walls, work benches and even carcasses. They enable the sampling of large surfaces and the detection of lower levels of contamination at a lower cost of operation.

Sani sponge
The versatility of sponges make them a popular choice for environmental sampling. Image courtesy of Labplas.

To summarize, environmental sampling is an important tool to verify sources of contamination and adequacy of sanitation process, helping to refine the frequency and intensity of cleaning and sanitation, identify hot spots, validate food safety programs, and provide an early warning of issues that may require corrective action. Over all, it provides the assurance that products being manufactured are made under sanitary conditions.

Eva Almenar, MSU

Packaging Technique Could Help Produce Last Longer

By Food Safety Tech Staff
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Eva Almenar, MSU
Eva Almenar, MSU
Eva Almenar and a team of researchers at Michigan State University may have found a way to make packaged produce last longer. (Image courtesy of University of Michigan)

Michigan State University (MSU) may have come up with a way to make packaged vegetables last much longer. After conducting an extensive evaluation of current techniques, researchers at MSU found that combining a package’s atmosphere of elevated carbon dioxide and reduced oxygen with a sanitizing treatment of sodium hydrochlorite could help ready-to-use onions last two weeks in a package (meaning that they were acceptable for purchase at this point). The results of the research, which was partially funded by USDA, were featured in an issue of the International Journal of Food Microbiology.

“We focused on ready-to-use onions, which have grown to become one of the five most commonly sold vegetables in the last decade,” said Eva Almenar, MSU AgBioResearch scientist in a news release. “Of all the variations that we tested, this one reduced microbial growth, respiration and discoloration, and preserved the desired aroma.”

The packaging technique could have potential use with other vegetables as well. Almenar is also investigating gas composition packaging and containers made from renewable sources.