Tag Archives: sanitation

Eliminating Listeria: Closing the Gap in Sanitation Programs

By Kevin Lorcheim
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Food production facilities are facing greater scrutiny from both the public and the government to provide safe foods. FSMA is being rolled out now, with new regulations in place for large corporations, and compliance deadlines for small businesses coming up quickly. Coverage of food recalls is growing in the era of social media. Large fines and legal prosecution for food safety issues is becoming more commonplace. Improved detection methods are finding more organisms than ever before. Technologies such as pulsed-field gel electrophoresis (PFGE) can be used to track organisms back to their source. PFGE essentially codes the DNA fingerprint of an organism. Using this technology, bacterial isolates can be recovered and compared between sick people, contaminated food, and the places where food is produced. Using the national laboratory network PulseNet, foodborne illness cases can be tracked back to the production facility or field where the contamination originated. With these newer technologies, it has been shown that some pathogens keep “coming back” to cause new outbreaks. In reality, it’s not that the same strain of microorganism came back, it’s that it was never fully eradicated from the facility in the first place. Advances in environmental monitoring and microbial sampling have brought to light the shortcomings of sanitation methods being used within the food industry. In order to keep up with the advances in environmental monitoring, sanitation programs must also evolve to mitigate the increased liability that FSMA is creating for food manufacturers.

Paul Lorcheim of ClorDiSys Solutions will be speaking on a panel of Listeria Detection & Control during the 2016 Food Safety Consortium, December 8 | LEARN MOREPersistent Bacteria

Bacteria and other microorganisms are able to survive long periods of time and become reintroduced to production facilities in a variety of ways. Sometimes construction or renovation within the facility causes contamination. In 2008, Malt-O-Meal recalled its unsweetened Puffed Rice and Puffed Wheat cereals after finding Salmonella Agona during routine testing of its production plant. Further testing confirmed that the Salmonella Agona found had the same PFGE pattern as an outbreak originating from the same facility 10 years earlier in 1998. This dormant period is one of the longest witnessed within the food industry. The Salmonella was found to be originating from the cement floor, which had been sealed over rather than fully eliminated. This strategy worked well until the contamination was forgotten and a renovation project required drilling into the floor. The construction agitated and released the pathogen back into the production area and eventually contaminated the cereal product. While accidental, the new food safety landscape looks to treat such recurring contaminations with harsher penalties.

One of the most discussed and documented cases of recurring contamination involves ConAgra’s Peter Pan peanut butter brand. In 2006 and 2007, batches of Peter Pan peanut butter produced in Sylvester, GA were contaminated with Salmonella and shipped out and sold to consumers nationwide. The resulting outbreak caused more than 700 reported cases of Salmonellosis with many more going unreported. Microbial sampling determined that the 2006 contamination resulted from the same strain of Salmonella Tennessee that was found in the plant and its finished product in 2004. While possible sources of the contamination were identified in 2004, the corrective actions were not all completed before the 2006–2007 outbreak occurred. Because of the circumstances surrounding the incomplete corrective actions, ConAgra was held liable for the contamination and outbreak. A settlement was reached in 2015, resulting in a guilty plea to charges of “the introduction into interstate commerce of adulterated food” and a $11.2 million penalty. The penalty included an $8 million criminal fine, which was the largest ever paid in a food safety case. While the problems at the Sylvester plant were more than just insufficient contamination control, the inability to fully eliminate Salmonella Tennessee from the facility after the 2004 outbreak directly led to the problems encountered in 2006 and beyond.

Many times, bacteria are able to survive simply because of limitations of the cleaning method utilized by the sanitation program. In order for any sanitation/decontamination method to work, every organism must be contacted by the chemical/agent, for the proper amount of time and at the correct concentration by an agent effective against that organism. Achieving those requirements is difficult for some sanitation methods and impossible for others. Common sanitation methods include steam, isopropyl alcohol, quaternary ammonium compounds, peracetic acids, bleach and ozone, all of which have a limited ability to reach all surfaces within a space, and some are incapable of killing all microorganisms.

Bacteria
Figure 1. Bacteria in a 10-micron wide scratch.

Liquids, fogs and mists all have difficulty achieving an even distribution throughout the area, with surfaces closer or easier to reach (i.e., the top or front of an item), receiving a higher dosage than surfaces further away or in hard-to-reach areas. Such hard-to-reach areas for common sanitation methods include the bottom, back or insides of items and equipment that don’t receive a “direct hit” from the decontaminant. Liquids, fogs and mists land on and stick to surfaces, which makes it harder for them to reach locations outside the line of sight from where they are injected or sprayed. Hard-to-reach areas also include ceilings, the tops of overhead piping lines, HVAC vents, cooling coils and other surfaces that are located at greater heights than the liquids, fogs and mists can reach due to gravitational effects on the heavy liquid and vapor molecules.

Another common but extreme hard-to-reach area includes any cracks and crevices within a facility. Although crevices are to be avoided within production facilities (and should be repaired if found), it is impossible to guarantee that there are no cracks or crevices within the production area at all. Liquid disinfectants and sterilant methods deal with surface tension, which prevents them from reaching deep into cracks. Vapor, mist and fog particles tend to clump together due to strong hydrogen bonding between molecules, which often leave them too large to fit into crevices. Figure 1 shows bacteria found in a scratch in a stainless steel surface after it had been wiped down with a liquid sterilant. The liquid sterilant was unable to reach into the scratch and kill/remove the bacteria. The bacteria were protected by the crevice created by the scratch, giving them a safe harbor location where they could replicate and potentially exit in the future to contaminate product itself.

Processing machinery
Figure 2. Processing machinery

Processing equipment and machinery in general contain many hard-to-reach areas, which challenge the routine cleaning process. In sanitation, “hard to reach” is synonymous with “hard to clean”. Figure 2 shows  processing equipment from an ice cream manufacturing facility. Processing equipment cannot be manufactured to eliminate all hard-to-clean areas. As such, even with all the sanitary design considerations possible, it is impossible to have equipment that does not contain any hard-to-clean areas. While sanitary design is essential, additional steps must be taken to further reduce the possibility of contamination and the risk that comes along with it. This means that in order to improve one’s contamination control and risk management programs, improvements must also be made to the sanitation program and the methods of cleaning and decontamination used.

Chlorine Dioxide Gas

Food safety attorney Shawn K. Stevens recently wrote that “given the risk created by the FDA’s war on pathogens, food companies should invest in technologies to better control pathogens in the food processing environments.”1 One method that is able to overcome the inherent difficulties of reaching all pathogens within a food processing environment is chlorine dioxide gas (ClO2 gas). ClO2 gas is a proven sterilant capable of eliminating all viruses, bacteria, fungi, and spores. As a true gas, ClO2 gas follows the natural gas laws, which state that it fills the space it is contained within evenly and completely. The chlorine dioxide molecule is smaller than the smallest viruses and bacteria. Combined, this means that ClO2 gas is able to contact all surfaces within a space and penetrate into cracks further than pathogens can, allowing for the complete decontamination of all microorganisms with the space. It also does not leave residues, making it safe for the treatment of food contact surfaces. It has been used to decontaminate a growing number of food facilities for both contamination response and contamination prevention in order to ensure sterility after renovations, equipment installations and routine plant shutdowns.

Conclusion

“If food companies do not take extraordinary measures to identify Lm in their facilities, perform a comprehensive investigation to find the root cause or source, and then destroy and eliminate it completely, the pathogen will likely persist and, over time, intermittently contaminate their finished products,” wrote Stevens.1  Environmental monitoring and sampling programs have been improved in terms of both technology and technique to better achieve the goal of identifying Lm or other pathogens within a food production environment. The FDA will be aggressive in its environmental monitoring and sampling under the food safety guidelines required by FSMA. Food production facilities will be closely monitored and tracked using PulseNet, with contaminated product being traced back to their source. Recurring contamination by a persistent pathogen will be viewed more severely. While there are many reasons that pathogens can persist within a food manufacturing environment, insufficient cleaning and decontamination is the most common. Traditional cleaning methods are incapable of reaching all surfaces and crevices within a space. In order to eliminate the risk of pathogens re-contaminating a facility, the pathogens need to be fully eliminated from their source and harbor locations. ClO2  gas is a method capable of delivering guaranteed elimination of all pathogens to maintain a pathogen-free environment. With the new era of food safety upon us, ensuring a clean food production environment is more important than ever, and ClO2 gas is uniquely situated to help reduce the risk and liability provided by both the government and the public.

In the summer of 2015, multiple ice cream manufacturers were affected by Listeria monocytogenes contamination. Part two of this article will detail one such company that utilized ClO2 gas to eliminate Listeria from its facility.

Reference

  1. Stevens, S.K. (June 3, 2016). “Find Contamination, Reduce Pathogens, and Decrease Criminal Liability”. Retrieved from https://foodsafetytech.com/column/find-contamination-reduce-pathogens-decrease-criminal-liability/
3M Luminometer software

New Technology Rapidly Detects Contamination in Food Processing Facilities

By Food Safety Tech Staff
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3M Luminometer software

Managers in food processing facilities are under more pressure than ever to get their product out the door quickly, but they cannot sacrifice safety. A new technology developed by 3M can help them quickly identify potential contamination in their facility, which can help them determine whether to stop production. The Clean-Trace Hygiene Monitoring and Management System is a handheld luminometer that was developed with the help of food manufacturing professionals in positions from plant floor operators to company executives.

“We involved customers throughout the development and design of the entire system to automate and streamline what is in many cases a tedious, manual process of selecting test points, assigning them daily, conducting tests, documenting results, managing sample plans, and developing quality improvement measures,” said Tom Dewey, 3M Food Safety global marketing manager in a press release.

3M Clean-Trace Hygiene Monitoring and Management System (Photo courtesy of 3M)
3M Clean-Trace Hygiene Monitoring and Management System (Photo courtesy of 3M)

The company made improvements to the device’s industrial design to make it more durable and user friendly. Other features include reengineered optical technology with photomultiplier detectors; upgraded software with a streamlined dashboard; and the capability to transfer data between the luminometer and the software via Wi-Fi and Bluetooth connections.

Fast Facts about Biofilm

By Maria Fontanazza
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It hides in the crevices. Once it gets onto equipment, it can linger for years. It’s biofilm, a formation of bacteria that adheres to surfaces and can be quite difficult to eradicate. A host of microorganisms, including Listeria and Salmonella, are linked to biofilm contamination. The following are insights gathered from Dominique Blackman, general manager at Realzyme, LLC and Jeff Mitchell, vice president of food safety at Chemstar during Food Safety Tech’s recent Listeria Detection & Control Workshop.

Biofilm Facts

  • Protected by multiple layers of polysaccharides
  • Acts as binding site for antimicrobials as well as a diffusion site, protecting bacteria within
  • Mechanisms of dispersal
    • Active: Releases cells based on environmental changes
    • Passive: Occurs as a result of shear or agitation (i.e., when doing deep cleans or moving equipment)
  • Hot spots
    • Transfer points in facility
    • Product contact points on equipment
    • Drains
    • Seams in walls/floor-wall junctures
    • Door seals
    • Cart wheels
    • Overhead vents and pipes
  • Causes a variety of problems within food manufacturing facilities, including:
    • Product contamination = Economic loss (i.e., as a result of recalls)
    • Reduced product shelf life (i.e., result of recurring contamination)
    • Reduced productivity, especially when equipment isn’t cleaned properly
    • Bacterial resistance to disinfection
    • Surface corrosion (the longer biofilm is in one place, the more time it has to damage equipment)
  • Successful removal requires complete penetration of extracellular polymeric substance without inactivating any sanitizer
Listeria

Listeria Workshop to Tackle Prevention, Detection and Mitigation

By Food Safety Tech Staff
1 Comment
Listeria

More effective environmental monitoring and improved sanitation practices, along with databases such as PulseNet, are helping the industry find Listeria contamination. However, once detected, many processing facilities have difficulty removing the bacteria.

Next month Food Safety Tech is holding a Listeria Detection & Control Workshop to educate food industry professionals about how to integrate prevention and mitigation procedures into existing sanitation, operation and testing programs. The two-day workshop, which takes place May 31 – June 1 in St. Paul, MN, will cover the basics of controlling Listeria, along with the following topics:

  • Detecting and penetrating biofilm
  • How to build an effective environmental testing program
  • Producing reliable testing to detect and control Listeria
  • Sanitation departmental role in prevention, control and mitigation
  • Building a master sanitation schedule
  • Innovative Listeria mitigation programs
  • Gaps in proactive food safety programs
  • Hygienic equipment design

Industry speakers include:

  • John Besser, Ph.D., deputy chief, enteric disease laboratory branch, CDC
  • Gina (Nicholson) Kramer, Savour Food Safety International
  • Dominique Blackman, Realzyme
  • Janet Buffer, The Kroger Company
  • Ken Davenport, Ph.D., 3M Food Safety
  • Bert de Vegt, Micreos Food Safety
  • Joellen Feirtag, Ph.D., University of Minnesota
  • Melinda Hayman, Ph.D., GMA
  • Sanja Illic, Ph.D., Ohio State University
  • Paul Lorcheim, ClorDiSys Solutions
  • Douglas Marshal, Ph.D., Eurofins Scientific
  • Jeff Mitchell, Chemstar
  • Megan Murn, Microbiologics
  • Robin Peterson, Micreos
  • Errol Raghubeer, Ph.D., Avure Technologies

The event takes place at the 3M Innovation Center in St. Paul, Minnesota. Workshop hours are Tuesday, May 31 from 11:00 am–6:00 pm and Wednesday, June 1 from 8:30 am–5:00 pm. For more information, visit the Listeria Detection & Control Workshop event website.

In the Food Lab

New Dynamics in Environmental Testing

By Erin Dreyling, Ph.D
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Recent recalls and outbreaks associated with Listeria coupled with FDA’s finalization of the FSMA preventive controls rule have heightened the industry’s need to focus on environmental testing programs. The need for a preventive control program with higher resolution is especially highlighted by the government’s increasing use of whole genome sequencing data to more rapidly link human illness to food processing establishments. I work with many customers who simply do not recognize all of the factors that influence their ability to detect Listeria in environmental samples. For many, an environmental sample is collected, shipped to a third-party lab, results are received within two to four days, and few questions asked. Most companies have not invested the time and resources needed to truly understand how each component of an environmental sample impacts their ability to detect Listeria. So what factors should be considered to maximize Listeria detection in the plant environment?

Learn innovative ways to mitigate the threat of Listeria at the Listeria Detection & Control Workshop | May 31–June 1, 2016 | St. Paul, MN | LEARN MOREListeria is a True Survivor

Listeria is inherently a hearty organism that can withstand highly adverse conditions in the plant environment. It is able to survive and grow across a wide range of temperatures, including refrigeration, and it is more tolerant to heat than Salmonella and E. coli. Additionally, the organism survives across a wide pH range, including extended periods in highly acidic conditions, and can survive food processing and preservation with up to 25.5% salt. These traits may result in highly injured Listeria being collected in environmental samples, and requires optimization of the sample collection and analysis process in order for detection and culture confirmation to occur.

Sanitation Programs May Not Destroy Listeria

Sanitation practices are intended to destroy Listeria in the plant environment, but not all sanitizers will be 100% effective. In some cases, sanitizers may not fully kill Listeria, leaving highly injured Listeria that may require an extended lag phase in order for growth and detection during testing. Sub-lethally injured Listeria remains a food safety concern, as the bacteria maintain the ability to recover and flourish in a nutritive environment. Additionally, Listeria readily forms biofilms in the plant environment, which many traditional sanitizers do not effectively remove. Biofilms in the plant environment may maintain low levels of Listeria that may be challenging to detect without the use of a sensitive detection method.

Sample Collection: Choose the Right Tool for the Job

The neutralizing and nutritive capacity of the collection media used with the collection device can have a significant impact on the ability to resuscitate, detect and culture stressed Listeria. When selecting a collection media, it is important to ensure that the media will effectively neutralize the sanitizers used in the plant environment. For instance, peroxyacetic acid and quaterinary ammonia-based sanitizers will not be neutralized well by commonly used collection media such as Neutralizing Buffer or Letheen Broth. Neutralization of the sanitizer in environmental samples is important in order for resuscitation and growth of any Listeria present within the sample. Additionally, use of a collection media that contains nutrients to begin the resuscitation process for Listeria immediately upon collection is also important for detection and culture confirmation of Listeria in samples. Collection media such as Neutralizing Buffer contains monopatassium phosphate, sodium thiosulfate, and aryl sulfonate complex intended only to neutralize sanitizers. Conversely, D/E Broth and HiCap Broth have components to nourish Listeria and facilitate resuscitation in addition to neutralizing sanitizers.

Enrichment Media Determines Recovery & Growth

Enrichment media plays a major role in the speed of recovery and growth of Listeria in environmental samples. Medias that facilitate faster recovery of injured Listeria allow for shortened lag phases facilitating more rapid growth. Enrichment media that facilitate faster recovery and growth allow Listeria to reach the limit of detection for screening tools more quickly. When paired with a highly sensitive method, enrichment media, which foster greater Listeria growth and recovery, can allow for significant reductions in time to results for screening methods. Additionally, faster recovery and growth of Listeria due to enrichment media can increase the likelihood of culturally confirming Listeria found at low levels pre-enrichment.

Not All Detection Methods are the Same

The ability of a detection method to find Listeria in an environmental sample is impacted by two factors: 1) method sensitivity and 2) method robustness in the presence of sanitizers. The more sensitive a rapid test method, the greater the chance of finding low levels of Listeria in an environmental sample. Low levels of Listeria in environmental samples are likely due to the injured state of Listeria in the plant environment post sanitization. Immuno-based rapid methods have a sensitivity of 105–106, DNA-based methods have a sensitivity of 104–105 and RNA based methods have a sensitivity of 102–103. Using an RNA-based method offers 1 to 2 logs greater sensitivity and greatly increases the chance of finding low-level Listeria.1 This can be particularly true when sampling conditions such as collection media or enrichment media are less than optimal for the neutralization of sanitizers and growth and recovery of Listeria.

Another important factor that influences a test method’s ability to detect Listeria in an environmental sample is the method’s ability to amplify and detect the organism in the presence of sanitizers. Most molecular-based methods do not include a sample clean up step resulting in sanitizer being present during the amplification step. For some methods, sanitizers may inhibit amplification, resulting in indeterminate or false negative results.

Confirmation Requires Optimization of the Sampling Process

The ability to culturally confirm a Listeria sample that screens positive is influenced by the entire environmental sampling process. In order to culture confirm samples with highly injured, low-level Listeria, it is necessary to optimize the sample collection media, enrichment media, and confirmation process to provide the greatest likelihood of culture recovery. If Listeria is not adequately resuscitated and able to achieve sufficient growth, the level of Listeria present in the sample post-enrichment may be below the limit of detection for culture. The likelihood of culture confirmation can be increased by incorporating steps such as a secondary enrichment or concentration via IMS capture. Culture confirmation for samples that screen positive on a rapid method can be especially challenging if a highly sensitive test method is used for screening that may detect Listeria at lower levels than culture. Thus, optimizing the environmental sample program is especially important if confirmation of screening results for highly sensitive methods is desired.

Method Sensitivity and Increased Positivity

Employing a highly sensitive screening tool for environmental samples provides a better lens to view risk within the food safety processing environment. Many companies fear that a more sensitive method will result in significant increases in positivity and cost for increased sanitation. In working with customers who have moved from immune-based methods to a highly sensitivity molecular method, I’ve observed an initial increase in positivity followed by a leveling off of low-level positivity after enhanced interventions are taken in the plant. Companies that proactively seek out and destroy Listeria in their plants are then able to maintain low level rates of positivity with routine cleaning measures, while also maintaining the confidence that they are using the best tool available for Listeria monitoring.

Understand Your Risk & Establish a Culture of Food Safety

It is important for food safety professionals to fully consider the hidden risks that may exist in their plant environment due to the environmental sample process masking the true presence of Listeria. Each component of the environmental monitoring process, sanitizer, collection media, enrichment media, detection method and culture process plays an important role in a company’s ability to be able to detect and culture confirm Listeria in the plant environment. Optimizing each step within the environmental sample process allows a company to be proactive instead of reactive. This approach creates a company culture of food safety that can seek out, detect and destroy Listeria in the plant environment, can significantly mitigate risk. The good news is that by incorporating the right food safety culture and making data-driven choices, today’s manufacturer can achieve both short-term dividends of risk reduction as well as a long-term elevation of control of its process.

Reference

  1. Culture Shift: The New Dynamics of Listeria Environmental Control and Testing. Roka Bioscience, Webinar.

Safe Food: A Product of a Clean Environment

By Gina R. Nicholson-Kramer
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Most recently we have seen an increase in foodborne illness outbreaks from Listeria to Salmonella to Norovirus to E.coli, many of which are a result of post-lethal contamination of processed foods. This is often a direct result of a gap in the sanitation programs that were in place at the processing facilities. Every facility should conduct a sanitation gap analysis on an annual basis. In order to receive unbiased feedback, this activity is best performed by a third party that is not a chemical provider.

Join Gina Kramer at the Listeria Detection & Control Workshop, May 31–June 1 in St. Paul, MN | LEARN MOREDeveloping and implementing a sound environmental hygiene program at a food processing facility is essential to its success in producing safe food for consumer consumption. There are fundamental basics of sanitation that every plant must follow in developing a strong program. The fundamental basics include: Developing sanitation standard operating procedures (SSOPs) for; Floors and drains, walls, ceilings, equipment and utensils, and employees. SSOPs must also contain perimeter control, foot traffic control into food preparation areas, zoning, and environmental sampling procedures.

Jeff Mitchell, Gina Kramer, Listeria
VIDEO: Jeff Mitchell and Gina Kramer discuss the increase in Listeria recalls. | WATCH NOW

When developing SSOPs, using the proper risk reduction formula will lead to sanitation success. To determine the best risk reduction formula, I sought the advice of sanitation expert, Jeff Mitchell, vice president of food safety at Chemstar. Before working for Chemstar, Mitchell was the Command Food Safety Officer for the United States Department of Defense (DOD). Serving more than 20 years for the DOD has given him the opportunity to visit thousands of processing facilities all over the world, seeing the best and the worst, and assisting in finding the root cause of contamination issues and negative environmental sampling results. In this article, I share Mitchell’s risk reduction formula for sanitation success and how to use the formula to build a solid and successful sanitation program.

Foundational Science

“An understanding of the difference between transient and persistent (or resident) pathogens is a key part in the foundational science of sanitation solutions,” explained Mitchell as we discussed the details of the risk reduction formula. Transient pathogens are those that are introduced to the processing facility from the external environment. Entrance occurs from deliveries on transportation vehicles and pallets, food, and non-food products and its packaging, employees and visitors, pests and rodents, along with leaks in the roof or improper cleaning of drains, which are known reservoirs.

Kramer_FoundationalScience“Persistent pathogens are those pathogens that establish residency within the processing facility. Most bacteria will aggregate within a biofilm, allowing them to live in communities. A biofilm is a survival mode for the bacteria; it protects it from sanitizer penetration. The biofilm layers actually masks it from sampling detection. You could swab a surface or an area and not get a positive pathogen test result, because the biofilm is masking it,” Mitchell stated. He continued to explain that most contamination risks are likely from established populations. Four things need to exist for resident populations to form: Pathogen introduction, water, trace organics and niche area for attachment and growth. Food processing facilities should be most concerned about these populations, as they’re being traced to many recent outbreaks and recalls.

In his experience, Mitchell shared that sanitation efforts should focus on areas within the processing facility where moisture and nutrients are collected; both are needed for biofilm formation. Disruption of these niche areas containing biofilm can result in direct (food contact) and indirect (non-food contact) contamination if the biofilm is not completely penetrated or removed. This can occur through active and passive dispersal of pathogens. Active dispersal refers to mechanisms that are initiated by the bacteria themselves where they naturally eject from the biofilm and land on other surfaces. Passive dispersal refers to biofilm cell detachment that is mediated by external forces that shear the biofilm, causing it to move and further spread. This can be caused through fluid shear, abrasion and/or vibration due to power washing, equipment vibration, or deep cleaning/scrubbing that does not penetrate and remove all the aggregate layers of biofilm. In other words, the biofilm and pathogens are just smeared around the facility like cleaning a mirror with a greasy wiping cloth.

Chemistry and Application

Kramer_CleaningMatrixThe cleaning matrix must be considered to properly remove soils that house both transient and persistent pathogens. This is done by combining proper cleaning and sanitizing agent concentration (PPM), adequate exposure time, proper temperature and mechanical action (agitation) or good old elbow grease. If there is a decrease in one area of the matrix, then an increase in the other areas needs to be made as an accommodation to the cleaning process. My years working in industry have taught me that the most expensive quadrant of the cleaning matrix is agitation, because it requires manual labor. Reduction of labor is one of the first ways companies build in efficiencies to increase profit margins. That means a solution must be built that focuses on temperature, concentration and proper contact time to produce the sanitation results necessary to prevent persistent pathogens from establishing residency within processing facilities.

Temperature should be regulated by the type of soils that need to be removed. High fat soils need a higher temperature of about 140⁰ F. However, when removing high protein soils, the temperature needs to be reduced so that the protein is not baked onto the surface. Baked proteins that are not removed become nutrients for bacteria to aggregate and reside. High temperature is does not work in every food processing plant, Jeff explained.

Proper balance of detergent and sanitizer is necessary to remove and destroy both transient and persistent pathogens. The detergent needs to be the right formulation and contact time to break down soils and biofilms with application of the right concentration and contact time of sanitizer to kill the exposed pathogens. Without the right balance in place it can create the perfect storm for spread and contamination within the processing facility.

Validation

Do your homework. Research is the most valuable tool when validating the effectiveness of a cleaning process. Private research is good but not the only form of validation on which to base a business decision. I have found that peer reviewed published research is best to use in validating all quadrants of the cleaning matrix. Academic research based on sound science that has practical application results is worth the investment to make sound business decisions.

Many products have been developed to penetrate and destroy the biofilm layers that bacteria aggregate. Again, do your homework. Choose a product that also provides a pathogen kill once the biofilm has been penetrated. I cannot stress enough to make sure that the SSOPs follow the manufacturer’s validated processes and the sanitation team follows the SSOPs’ directions.

Solution

Applying the desired solution requires dividing the processing facility into zones to designate specific sanitation requirements. This will assist in the development of specific SSOPs that apply the right solution in the right zone throughout the site.

Kramer_ZoneMitchell also gave great advice about cleaning tools and cleaning chemical basics. He explained that a facility should color code the cleaning tools according to zone and only use them in the designated zone area. This prevents cross contamination from occurring, because cleaning tools can be vehicles of contamination transfer. Utilize foam detergents and foam sanitizers as they are more forgiving and increase contact time, and sanitation crew can see where they have applied the chemicals. Use the Ross-Miles foam test for stability: Foam should last more than three minutes before breaking and turning into a liquid solution that runs down the drain, costing a site money and opening up the potential for introducing pathogens into production rooms.

Mitchell advised the development of sanitation procedures that focus on daily thorough cleaning of everything from the knees down in Zones 1-3. “You want to knock everything down and keep it down. The objective is to keep bacterial creep from occurring,” he said. “Creep is where bacteria are moved by processes like water spray, splash and aerosolization, causing the bacteria to move from one area (it usually develops on the floor) to then move up walls and the legs of equipment, etc.— eventually causing contamination of food during food production and packaging.” Obviously, all food contact surfaces in Zone 1 need to have specialized SSOPs according to the equipment, food processing shifts per day, and type of foods that are being processed.

Mitchell stressed that perimeter and foot traffic control entry programs should incorporate a good foam sanitizer that stands up to the Ross-Miles test with optimal duration of five minutes. The distribution of the foam should cover a large enough area that the employees’ foot path and equipment must travel through the foam to achieve contact to control transient pathogen entrance into Zones 1–3. Concentration levels of these areas should be at least double what the food contact area strength is for effectiveness of log kill needed for control.

Environmental monitoring procedures should follow the zoning process set up for sanitation. “Swabbing for Adenosine Triphosphate (ATP) and/or Aerobic plate count (APC) are tools that can be used to help identify biofilm locations. One thing to note is that the bacteria located under the biofilm are in a modified dormant state requiring less energy and making less ATP available for detection.  With that said, ATP and APC swabbing are still both viable tools to use in sanitation verification,” said Mitchell. If you only test for general risk pathogens in your facility you may receive false negatives due to biofilm masking the pathogen from showing up as a positive in environmental testing. Utilizing both general pathogen, ATP and APC in concert, is the best combination in a facility’s environmental monitoring program. The goal is to seek and find then destroy and verify.

I recently discovered a great biofilm visual detection test from Realzyme that is wonderful to use to verify whether the sanitation system in place is working. It can also differentiate between protein build-up and biofilm formation. In my professional opinion, this visual detection test is essential to incorporate in a robust environmental testing system.

Safe Food: The End Product

Our responsibility as food safety/quality professionals is to provide the safest, most delicious food for our customers to enjoy. To ensure safe food in our end product, we need to develop a robust sanitation and environmental testing program that follows the risk reduction formula (Foundational Science + Chemistry & Application + Validation = Solution) and conduct an annual sanitation gap analysis by a third-party expert for continuous improvements.

Apply these steps to protect your food, protect your brand and protect your customers so that they Savor Safe Food in every bite!

Scotch, ice cubes

Scotch On the Rocks, but without E. Coli, Please

By Food Safety Tech Staff
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Scotch, ice cubes

This article was part of our April Fool’s edition. 49% of poll participants thought this story was fake. Alas, it’s true! Better luck next time.

If you plan on visiting Switzerland any time soon, take your beverages without ice. Why? A recent study has found that more than 25% of ice cubes used in bars and restaurants in Switzerland contain bacteria, including E. coli, pseudomonas and enterococci. According to SonntagsBlick, the publication that released the information, the bacteria is an indication of unsanitary ice cube production, namely due to the machines being kept in basements and cellars and not being properly cleaned or maintained.

“Abroad you are always careful with ice,” Sara Stalder, director of a consumer protection group told SonntagsBlick. “But in Switzerland one would never expect one in four ice cubes to exceed legal limits.” Despite the fact that the ice cubes surpassed legal limits in terms of the presence of bacteria, the amount of bacteria isn’t enough to be dangerous to humans.

You can be the judge of that.

Sanitation in Retail

Out with the Old: From Dirty Rags to Cleaner, Safer Technology in Retail

By Maria Fontanazza
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Sanitation in Retail

Across the board, increased employee awareness and training has become a big issue in food safety. The foodborne illness outbreaks that hit Chipotle Mexican Grill has put retail and restaurant establishments on high alert, yet this is just another example of the reactive culture in which we operate, according to Matt Schiering, vice president and general manager at Sani Professional.

Matt Schiering, Sani Professional
“Think about your own restaurant experiences. Guests don’t want to see or be confronted with a greyish brown rag [that is used to] wipe a table, then wipe a seat, then wipe an adjacent table. It just screams unclean,” says Matt Schiering of Sani Professional.
Food Safety Tech recently hit the road with Schiering and John Caton, regional sales manager at Sani Professional, to experience first hand how one company is communicating its message to customers. Breaking with tradition has been an important part of promoting cleaner technology: The use of the rag and bucket as a means to clean both the front of the house (tables, chairs, counters, etc.) as well as the back of restaurants and retail establishments, while still fairly common, has outlived its effectiveness, and frankly, says Schiering, “screams unclean”. Caton and Schiering continued the conversation with their customers about how using disposable wipes for cleaning, sanitizing and disinfection helps prevent the spread of contamination, along with the cost savings associated with using such products. The company takes a multi-prong approach to promoting awareness among its current and potential clients, from deploying a sales force that directly interacts with quality assurance and food safety professionals in establishments to offering how advances in sustainable technology can help them stay ahead of the curve to driving consumer advocacy.

Food Safety Tech: How is Sani Professional raising the level awareness of the disadvantages of the traditional cleaning method (the rag and bucket method) in the retail environment?

Matt Schiering: There are a few ways to raise the level of awareness. The first and foremost is “feet on the street”. We’ve deliberately moved toward a direct-to-customer sales force, which gives us the opportunity to interface directly with QA, food safety and operations to show them a simpler, more efficient, more effective, and guest appealing way versus the traditional rag and bucket. The first win is one for the user (the employees of a given establishment), because associates have shown us time and time again that they do not like the mixing and measuring, and the errors that are often associated with that process. They don’t like the dirty rag itself—having to fish it out of the bowl and then present it or be seen with it in the front of the establishment. It’s a win for the operator (the manager), because with our system, there’s no longer any heightened heart rate when the health inspector shows up. One of the most common violations is the water in the buckets being out of spec or the rags themselves not being inside the bucket per regulation. And perhaps most importantly, it’s a win for the guest. Think about your own restaurant experiences. Guests don’t want to see or be confronted with a greyish brown rag [that is used to] wipe a table, then wipe a seat, then wipe an adjacent table. It just screams unclean.

As we talk about the evolution in perception, away from traditional methods, we believe that speaking directly to the consumer has to play a role. There has to be a degree of consumer-driven advocacy for a better way. – Matt Schiering

FST: Regarding employee training, how should retailers be more proactive in ensuring their employees are engaging in proper food safety practices and aren’t spreading foodborne illnesses?

Schiering: It varies by chain. Unfortunately, we live in a reactive culture—and that goes well beyond the restaurant industry.

Oftentimes a problem precedes a protocol or other means of addressing said problem. Chipotle is one example: They’ve taken an exhaustive look at restructuring their food safety protocols as a result of a myriad of foodborne illness-related issues that they suffered in the preceding months. The [retailers] who are doing it best are the ones who build it into their establishment in the first place where it’s not predicated by some sort of problem. That involves training materials, in-service lessons, and online training (i.e., ServSafe certifications). Waffle House, for example, has Waffle House University where food safety is a key component to that system.

We envision ourselves as part of that process. We take a microcosm—the notion of proper food handling, prevention of cross contamination related foodborne illness—and provide an innovative and easy-to-use solution, and all the training and collateral materials associated with the solution that explain the proper use. We also provide test kits so that if the health inspector wants an in-the-moment proof that our product is doing what the label says it does, [the retailer] can provide that at a moments notice. It becomes more of a service proposition than simply a product-driven solution.

Sanitation in Retail
Using disposable wipes for cleaning, sanitizing and disinfection can help prevent the spread of cross contamination and foodborne illness.

FST: Where do you see sustainable products fitting into the space?

Schiering: This also boils down to education, because the perception of disposables is that they’re wasteful, when in fact they needn’t be any more costly than existing solutions.

If you’re using a linen service, there’s a cost associated with renting towels, but there’s a higher cost associated with wasting towels. So if a towel ends up in a gym bag or in the trash because of overuse and/or abuse, there’s a significant upcharge for not returning that towel to the rental agency. That’s what we call the hidden cost or the dirty little secret of rag and bucket sanitizing. When you factor that in, and everyone [retailers] experiences that type of loss, and you look at the fact that sanitizing wipes kill pathogens trapped in the wipe as well as whatever it is coming into contact with at the surface, thereby enabling it to be used on multiple surfaces without causing cross contamination—the cost aligns very closely. And of course it’s a more value-added guest experience than a dirty rag being used from table to table, which is not preventing cross contamination.

Speaking to the environmental piece: At the moment, we’re actually fairly well ahead of the industry. It varies chain to chain—some chains are doing a better job than others, because it’s part of their corporate culture. But by providing solutions that are leveraging either recyclable substrates or compostable substrates, we provide greater opportunity to reduce the environmental impact often associated with disposable products. If a retailer is working with a waste management partner that can handle industrial compostable products or non-solid state recyclables, we have solutions that are appropriate for those operations, so that we’re not just adding to landfills but rather essentially recycling and/or regenerating the products that are being used, and at no greater cost.

Most retailers haven’t gotten there yet. It speaks directly to corporate culture and corporate mission of the end user. We deliberately target customers who are a little bit ahead of the curve when it comes to “green technology or “green behavior”. And so when the rest of the industry catches up, we’re more than ready to serve them with products that meet those needs.

FST: Where do consumers fit into the picture, especially has industry moves away from traditional methods in food safety?

Schiering: About a decade ago, consumers started demanding that retailers like Walmart, Target, and local grocers provide a means of sanitizing shopping carts when they walk into their local retail establishments. There were myriad news reports about the germs and potential for contamination and illness arising from the often used and rarely cleaned implements—these vehicles for placing your groceries. We answered the call a decade ago, and at one time it was a significant piece of our business.  It continues to be a marketplace we serve, albeit a much commoditized one. But the rise in that solution would not have taken place if not for consumers advocating for a better way.

We’re starting to create a presence on Facebook and other social media outlets to remind consumers that it’s up to them in many cases to ask for, if not demand a more effective, more pleasing way of ensuring their safety in dining establishments. Unfortunately, incidents like what we saw at the large Mexican food service retailer do ultimately play a part in that consumer advocacy, albeit a negative one, because we are a reactive society. But by presenting a positive message and sharing alternatives in the absence of citing examples or shaming retailers through the problem, we believe that will be one of the keys to changing perceptions at the retail level.

Mike Hardegree, Proton Towels

Advancing Technology in Disinfection and Sanitation

By Food Safety Tech Staff
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Mike Hardegree, Proton Towels

“There is a lot of new technology that has taken place in sanitizers, [and] in practices, procedures and protocols to reduce the risk of foodborne illness,” said Mike Hardegree of Tietex International, Ltd at the Food Safety Consortium. “The cotton towel and the disinfecting and cleaning towels most often used are the same ones that have been used for many, many years.”

In the following video, Hardegree and Margaret Hearon, market development manager at Teitex share how the single-use towel technology is reducing the risk of cross contamination.

 

Gina Kramer
Food Safety Think Tank

Listeria, the Pesky Bug is Everywhere!

By Gina R. Nicholson-Kramer
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Gina Kramer

“When a flower doesn’t bloom you fix the environment in which it grows, not the flower.”  A quote, by Alexander Den Heijer, trainer, speaker, purposologist, that rings true in food safety. When there is a contamination issue in food processing, one must fix the environment in which food is being processed. Safe food is a product of a clean environment.

We have better environmental sampling programs in our food manufacturing plants and processing facilities, and we have sanitation standard operating procedures, so why are we seeing a prevalence of Listeria, and in rising numbers?  I recently sat down with Jeff Mitchell, vice president of food safety at Chemstar, about the recent increase in Listeria outbreaks and how you can rid your facility of the dangerous pathogen.

We’re seeing Listeria—in product recalls and outbreaks—over the last couple of years, and in multiple numbers. Why do you think this is happening?

Jeff Mitchell, Gina Kramer, Listeria
My interview with Jeff Mitchell about the increase in Listeria recalls.  Watch the video

Jeff Mitchell: The distribution of Listeria in the environment has not changed, and the processes that we use for processing food really haven’t changed. What’s changed is the way that we collect data. We have PulseNet now, which gathers information. If someone goes to a medical treatment facility with a foodborne illness, they’re going to investigate that and they’re going to get the whole genome sequencing on the pathogen.

There’s a difference between understanding what transient Listeria is and resident Listeria. I think there are a lot of sanitation efforts being put forth to eliminate the resident populations—those are the populations we’re most concerned about, and they’re the ones that are being related back to a lot of these recalls.

If I have resident Listeria in my facility, why can’t I find it?

Food Safety Tech is organizing a Listeria Detection & Control Workshop, May 31 – June 1, 2016 in St. Paul, MN. LEARN MOREMitchell: Resident populations of Listeria are found in a biofilm—most bacteria aggregate within a biofilm. A biofilm is a survival mode for the bacteria; it protects it from sanitizer penetration. That layer actually masks it from sampling. You could swab a surface or an area and not pick it up, because the biofilm is masking it.

Jeff goes on to discuss the type of sanitation program that companies should have in place to get rid of resident Listeria. You can learn about the steps you need to take in my video interview.