Category Archives: Uncategorized

Researchers Develop “Rechargeable” Plastic Film to Battle Biofilms

 

Researchers have taken the next step in active packaging by developing a plastic film made with bacteria killing polymers, or numerous molecules all strung together. A method in which researchers have proven to be an effective approach in the fight against biofilms.

Biofilms—a thin, slimy film of bacteria that can stick to a surface—increase bacterial resistance to antimicrobials, as well as to disinfectants, according to the American Society of Microbiology. Biofilms can even function in some respects like a tissue, possessing a primitive circulatory system.

But, by modifying the polymer of plastic films, researchers have established a rechargeable disinfecting material that can be applied to conveyer belts, food-contact surfaces, utensils, as well as other equipment. However, researchers are still in the process of formulating the plastic film.

“Currently, we do not have an active approach to continuously prevent deposition of bacteria during food processing operations,” said Nitin Nitin, a professor and engineer with the departments of Food Science and Technology. “And can only remove these deposits after processing – during a cleaning shift.”

The research team targeted biofilms because they are “the leading cause of cross contamination of food and non-food materials upon contact with contaminated surfaces,” according to the research results published in Applied Environmental Microbiology.

The research team not only succeeded in preventing the formation of biofilms by killing bacteria, but were also able to kill existing biofilms on food production surfaces by applying the plastic film.

Read More.

 

Sources

(2017). Fighting Slime: Researchers Develop Bacteria Killing Plastic Film. Food Safety News.

Retrieved from

http://www.foodsafetynews.com/2017/08/fighting-slime-researchers-develop-bacteria-killing-plastic-film/#.WbAXQfmGPIX

(2017). What is a Polymer? Polymer Science Learning Center.

Retrieved from

http://www.pslc.ws/macrog/kidsmac/basics.htm

Cossu, A., Nitin, N., Si, Y., Sun, G. (2017). Introduction. Applied and Environment Microbiology, 73 (18), 5.

Retrieved from

http://aem.asm.org/content/early/2017/07/24/AEM.00975-17.full.pdf+html?ijkey=6l/CfGFq9ES22&keytype=ref&siteid=asmjournals

Davies, D.G., Rickard, A.H., Sauer, K. (2016). Biofilms and Biocomplexity. American Society for Microbiology.

Retrieved from

https://www.asm.org/index.php/component/content/article/114-unknown/unknown/4441-biofilms-and-biocomplexity?highlight=YToxOntpOjA7czo3OiJiaW9maWxtIjt9

What Does It Mean When Milk is Pasteurized?

Since the 1980s when the milk industry saw a decline in sales, they began campaigning with the slogan “Milk Does a Body Good” before evolving into “Got Milk?” But though the campaign promoted the health benefits, in today’s world consumers have a say in choosing if they want raw milk from a farm.

Raw milk is defined as “milk from cows, goats, sheep, or other animals that have not been pasteurized,” according to The U.S. Centers for Disease Control (CDC).

So, what exactly does pasteurized mean to consumers?

Pasteurization is the process in which milk is heated to a specific temperature for a set period of time in order to kill bacteria and pathogens in the substance. First developed by Louis Pasteur in 1864, pasteurization kills harmful bacteria responsible for such diseases as Listeria, typhoid fever and even tuberculosis.

But though consumers have a firm belief that pasteurized milk is not as wholesome as raw or unpasteurized, researchers show no meaningful difference in the nutritional value between pasteurized and unpasteurized milk.

“Ultimately, the scientific literature showed that the risk of foodborne illness from raw milk is over 100 times greater than the risk of foodborne illness from pasteurized milk,” said Benjamin Davis, a CLF-Lerner Fellow, doctoral candidate and lead author of the Johns Hopkins report. “We believe that from a public health perspective it is a far safer choice to discourage the consumption of raw milk.”

Read More.

 

Sources

(2017). The Dangers of Raw Milk: Unpasteurized Milk Can Pose a Serious Health Risk. U.S. Food and Drug Administration.

Retrieved from

https://www.fda.gov/food/resourcesforyou/consumers/ucm079516.htm

Maberry, T. (2015). FSM Scoop: Raw Milk. Food Safety Magazine.

Retrieved from

http://www.foodsafetymagazine.com/enewsletter/fsm-scoop-raw-milk/

Pearsall, M.J. (2014). Is Raw Milk Increasing Risk in Our Food Supply? Food Safety Magazine.

Retrieved from

http://www.foodsafetymagazine.com/enewsletter/is-raw-milk-increasing-risk-in-our-food-supply/

Can Proper Handwashing Protect Children at Petting Zoos?

 

In the last decade or so, petting zoos have been a major source for disease-causing bacteria including E. coli. However, the spread of the disease could be prevented if proper handwashing was practiced.

In 2004, a 13-year-old girl named Katie Maness was taken to a State Fair in Raleigh, North Carolina. Katie and her parents stopped by numerous exhibits to pet cows, pigs and goats. However, one of the goats managed to knock Katie to her hands and knees on the muddy ground. Four days later, Katie started experiencing symptoms of bloody diarrhea and was rushed to the hospital where her family learned she had been infected with E. coli.

So, how does the infection spread?

Perfectly healthy animals can be harboring diseases that can make adults and children sick. And though the pathogens don’t always make the animals sick, they do end up in the animals’ feces, which is where the fecal-to-oral route begins.

Children are more susceptible to infection due to their growing immune systems. Not to mention their unsanitary behavior. What can happen is that feces can get on the animal’s fur, bedding, fence railing, and even in the dust in the air. And after coming into contact with the contaminated area, children often bite their nails or suck on their thumbs, which can spread the infection to their mouths.

“Although animal exhibits at fairs are substantially safe, they’re not risk free,” said South Dakota state veterinarian Russ Daly. “Adequate hand washing and common sense safety measures will help ensure a safer experience for everyone involved.”

Read More.

 

Sources

(2017). Stay Healthy at Animal Exhibits. Centers for Disease Control and Prevention.

Retrieved from

https://www.cdc.gov/features/animalexhibits/index.html

Andrews, J. (2012). The Petting Zoo Problem. Food Safety News.

Retrieved from

http://www.foodsafetynews.com/2012/11/the-petting-zoo-problem/#.WZRRLTOGPIV

Beecher, C. (2017). Steer Clear of Fair Foibles – Pun Intended; Pigs Problematic, Too. Food Safety News.

Retrieved from

http://www.foodsafetynews.com/2017/07/steer-clear-of-fair-foibles-pun-intended-pigs-problematic-too/#.WZRROjOGPIW

Modern Food Trends: Innovative or a Safety Concern?

 

As the popularity of modern food trends continue to grow, so does the many food safety concerns associated with them; forcing food safety specialists to stay on their toes in the likelihood of an outbreak. Some of the most talked about food trends today involve some very controversial methods that have caused consumers to fall ill or even die.

Several restaurants have flocked to the idea of keeping a hydroponic wall garden—a method of growing vegetation with either sand or gravel—inside the restaurant. Restaurants do this as way to show their consumers exactly where their herbs and leafy greens are being grown (Nicholson-Kramer, 2017).  Some restaurants have even gone as far as to grow their gardens on rooftops or in flower beds.

But despite how innovative, and downright creative the food trends appear to be, the real question is: is it safe to grow produce where consumers dine? 

Ultimately, no.

The reason being is that some restaurants have yet to consider the possibility of a non-consumer contaminating the vegetation, as well as run the risk of Listeria, and other foodborne disease-causing bacteria, developing when growers lack a good food safety protocol (Nicholson-Kramer, 2017).

Though the thought of locally grown, locally produced products seem like a sensible route to go down. Yet, what most consumers don’t know is that foodservice companies must carry out supplier-approval programs for local growers and producers (Nicholson-Kramer, 2017). In short, they’re required to apply food safety practices at every step of the growing, harvesting, processing and distributing process. Thus, traceability is more vital now than it ever was.

For instance, in 2011, Jensen Farms in Colorado experienced a Listeria outbreak which resulted in 33 people dying from contaminated cantaloupe (Neuman, 2011). One would think locally grown producers would take extra precautions. However, investigators tracked the melons back to a truck that traveled through a cattle lot and possibly brought Listeria back to the packing area.

Evidently, the farm did not follow the FDA guidelines for cooling melons. The guidelines specify that melon supplies are to be cooled by forced-air cooling or by the use of a chilled water drench, which can vary from 13 to 18 degrees Celsius (Melon Commodity Specific Guidance, 2005). And, if done correctly with water, may reduce microbial loads that contaminate the outside surface of melons.  In this case, the melons were packed warm in boxes that were then refrigerated. This method has the potential to produce condensation that promotes Listeria growth. But Listeria isn’t the only outbreak concern as consuming raw cookie dough has developed into a common food trend.

In 2016, 38 people became infected with E. coli in 20 states from the raw flour produced at a General Mills facility in Missouri (Gold Medal, Gold Medal Wondra, and Signature Kitchens Flour Recalled Due to Possible E. coli 0121 Contamination, 2016). The consumers had reported using the flour in the week before they ate the homemade batter.

So, how does flour, a low-water-activity food, become a hazardous ingredient? Wheat and other grains that are grown for flour production are not treated to kill bacteria that might come from animals, especially birds and rodents, which can defecate on the grain before it is milled into flour (Nicholson-Kramer, 2017). The expectation has always been that the flour used to make food will be cooked before consumption in order to kill foodborne pathogens that may remain in the product. But though consumers may neglect to read the food safety guidelines, it is, however, still the manufacturers’ responsibility to label any packaging appropriately.

For instance, manufacturers of gluten-free (GF) products are also accountable for the strict requirements of defining what GF means on packaging in order to gain GF certification (Nicholson-Kramer, 2017).

So, what does it mean to be GF?

Having a GF diet means avoiding certain grains, such as wheat, barley, rye, or hybrids of these grains since they all contain a protein called gluten (Thompson, 2008). 

Since 2013, the FDA has issued a final rule which defines GF for food labeling in order to help consumers and those with celiac disease (a disease that causes an immune reaction after eating the protein gluten) (Gluten and Food labeling, 2016). So, items labeled as GF must meet the defined standard. The FDA also recognizes that those with celiac disease are interested in seeing GF labels in restaurants and other retail establishments. Thus, the FDA has stated that GF claims in restaurants’ and other establishments’ should be consistent with the FDA’s definition (Gluten and Food labeling, 2016).

Regardless of how creative and futuristic these modern food trends seem to be, the consumers’ safety should always come first. And in order for these food trends to continue, food safety specialists must be ready to respond to the many safety challenges that they bring.

 

Sources

1. (2005, November 7). Melon Commodity Specific Guidance. Commodity Specific Food Safety Guidelines for the Melon Supply Chain 1st Edition, 13.

Retrieved from

https://www.fda.gov/downloads/Food/GuidanceRegulation/UCM168625.pdf

2. (2016). Gluten and Food labeling. U.S. Food and Drug Administration.

Retrieved from

https://www.fda.gov/Food/GuidanceRegulation/GuidanceDocumentsRegulatoryInformation/Allergens/ucm367654.htm

3. (2016). Gold Medal, Gold Medal Wondra, and Signature Kitchens Flour Recalled Due to Possible E. coli 0121 Contamination. U.S. Food and Drug Administration.

Retrieved from

https://www.fda.gov/Safety/Recalls/ucm513288.htm

4. Neuman, W. (2011). Listeria Outbreak Traced Back to Colorado Cantaloupe Packing Shed.  The New York Times Company.

Retrieved from

http://www.nytimes.com/2011/10/20/business/listeria-outbreak-traced-to-colorado-cantaloupe-packing-shed.html

5. Nicholson-Kramer, G. R., R.S./REHS, Fasone, V., R.S./REHS. (2017, June/July). Consumer Food Trends Create Food Safety Challenges for the Foodservice Industry.  Food Safety Magazine, Vol. 23, No.3, 39-40, 42-45.

6. Thompson, T., MS, RD. (2008). So, What Exactly Is a Gluten-Free Diet?.  Gluten-Free Dietitian.

Retrieved from

http://www.glutenfreedietitian.com/dietcom-blog-so-what-exactly-is-a-gluten-free-diet/

Chocolate Milk Making a Comeback?

The low-fat 1% chocolate milk including the low-fat flavored milks are making a comeback in schools and are now being reintroduced through the National School Lunch program, School Breakfast program and Smart Snacks. Due in part to educators who have come to the idea that the health benefits of low-fat 1% chocolate milk, and the vitamins and minerals associated with it, outweigh the drawbacks from some extra sugar.

“Dozens of U.S. public schools have banned chocolate milk only to reconsider after milk consumption dropped among students,” Said Rachel Johnson, a University of Vermont nutritionist who toured Canada in support of the country’s dairy industry last year to discuss the benefits of chocolate milk.

However, some educators disagree and have booted the choice of chocolate milk from the cafeteria’s menu, such as the district officials in San Francisco who decided it was a no go. Officials tested the idea in five schools over the past school year and found that in two of them, there was no decrease in the number of milk cartons kids put on their trays, and there was only a slight dip in the other three.

Ultimately, the new rules allow for students to have more flexibility and help schools address the nutrition, taste and health needs of the students they served, linking the chocolaty beverage to improved bone health, especially in children and adolescents.

Read More.

 

Sources

Corbin L., (2017). Chocolate Milk back on LAUSD Menus Despite Some Parental Concerns. KABC-TV.

Retrieved from

http://abc7.com/food/chocolate-milk-back-on-lausd-menus-despite-concerns/2004098/

 

Johnson R.K., Frary C., Wang M.Q. The nutritional consequences of flavored milk consumption by school-aged children and adolescents in the United States. J Am Diet Assoc. 2002; 102: 853-856.

 

Kline A., (2017). School Meal Flexibilities for School Year 2017-2018. USDA FNS Memo Code SP 32-2017.

Retrieved from

https://www.fns.usda.gov/school-meals/school-meal-flexibilities-sy-2017-18.

 

McMahon, T. (2012). Sweet Redemption: Chocolate Milk Making a Comeback in Schools. National Post, a division of Postmedia Network Inc.

Retrieved from

http://nationalpost.com/news/canada/sweet-redemtion-chocolate-milk-making-a-comeback-in-schools/wcm/4f27d202-94db-41b6-94f2-9ed6e04a97a0

 

National Dairy Council and School Nutrition Association. The School Milk Pilot Test. Beverage Marketing Corporation for National Dairy Council and School Nutrition Association. 2002.

 

Tucker, J. (2017). Chocolate Milk Booted Off the Menu at SF School Cafeterias. San Francisco Chronicle.

Retrieved from

http://www.sfchronicle.com/education/article/SF-schools-no-longer-sweet-on-chocolate-milk-in-11276367.php

Is Our Go-To Mac and Cheese Snack Unusually Toxic?

From organic based to the blue box brand, mac and cheese is the go-to snack for most American consumers. But though America’s favorite processed cheese food is what every family serves, the food also serves up a hefty amount of phthalates. Phthalates are a class of chemicals that are considered to interfere with the body’s hormones, and are possibly dangerous to pregnant women and children.  Which, yikes—sounds bad.

However, scientists haven’t been able to weigh in on the study methods, designs, conclusions, or dosage for that matter. So, there is no accepted threshold for how many phthalates you need to consume before they harm you.

“There’s really no dose that we know that will lead to significant health effects,” said Sheela Sathyanarayana, an associate professor of pediatrics at the University of Washington in Seattle and Seattle Children’s Hospital.

Sathyanarayana noted that she had not run the numbers herself yet, but commented that one would probably need to eat multiple boxes a day to start seeing clear negative health effects.

Read more.

 

Sources

Matthews, S. (2017). Please Don’t Panic Over the Chemicals in Your Mac and Cheese. The Slate Group.

Retrieved from

http://www.slate.com/articles/health_and_science/medical_examiner/2017/07/don_t_panic_over_the_chemicals_in_your_mac_and_cheese.html

 

Pierre-Louis, K. (2017). Mac-N-Cheese Probably Isn’t More Toxic Than Other Foods. Popular Science.

Retrieved from

http://www.popsci.com/mac-n-cheese-toxic

 

Singal, J. (2017). You (Probably) Don’t Need to Worry About the Chemical in Your Macaroni and Cheese. New York Media LLC.

Retrieved from

http://nymag.com/scienceofus/2017/07/chemicals-macaroni-and-cheese.html

Explore Travel Health with the CDC Yellow Book

CDC Health Information for International Travel (commonly called the Yellow Book) is published every two years as a reference for health professionals providing care to international travelers and is a useful resource for anyone interested in staying healthy abroad. The fully revised and updated CDC Yellow Book 2018 codifies the U.S. government’s most current travel health guidelines, including pre-travel vaccine recommendations, destination-specific health advice, and easy-to-reference maps, tables, and charts.

The CDC’s 2018 edition of it’sHealth Information for International Travel” guide is now available and accessible for free online.  CDC Yellow Book – table of contents

The 2018 Yellow Book includes important travel medicine updates:

  • The latest information about emerging infectious disease threats such as Zika, Ebola, and MERS
  • New cholera vaccine recommendations
  • Updated guidance on the use of antibiotics in the treatment of travelers’ diarrhea
  • Special considerations for unique types of travel, such as wilderness expeditions, work-related travel, and study abroad
  • Destination-specific recommendations for popular itineraries, including new sections for travelers to Cuba and Burma

The revised edition contains sections for “Self Treatable Conditions”, Pre and Post Travel Evaluations, Transportation Issues, Traveling with Children, and Traveling with Special Needs.

The latest hard cover edition is currently available for sale from Oxford University Press and is available on Amazon and Barnes & Noble.

The CDC’s 2018 edition of it’sHealth Information for International Travel” guide is now available and accessible for free online here. 

CDC fowl warning: Hundreds sickened by backyard flocks

More than a third of the 372 people infected with Salmonella from backyard flocks so far this year are children younger than 5 years old, with the Centers for Disease Control and Prevention reporting eight separate outbreaks across 47 states. ….

From Jan. 4 through May 25, the CDC had confirmation of 372 people with Salmonella infections linked to contact with live poultry in backyard settings. Of those, 71 had symptoms so severe they required hospitalization. Thirty-six percent of the infected people are children younger than 5 years old.

Public health officials interviewed 228 of the sick people and 190, or 83 percent, reported contact with live poultry in the week before they became ill……

While contracting Salmonella, E. coli, Campylobacter and other bacteria from live poultry is relatively easy, the preventive measures recommended by public health officials are also easy, but must be practiced diligently. Tips include:

  • Wash hands after handling live poultry.
  • Do not allow live chickens, ducks, and geese in the house, especially the kitchen.
  • Do not allow children younger than 5 years to handle or touch live poultry and eggs without supervision.
  • Do not snuggle or kiss the birds, touch your mouth, or eat or drink around live poultry.

Read more. Food Safety News June 2, 2017

Study: Effective Handwashing Does Not Require Hot Water

Handwashing is a hot topic in the world of food safety. Lack of proper handwashing procedures in food service and other sectors can lead to the spread of foodborne illness. Are current handwashing rules in need of updating? A new study suggests it may be time.

According to research released by Rutgers University, cool water is apparently just as effective as hot water in terms of washing away harmful bacteria. For the study, 21 volunteers had their hands covered with a harmless bacteria multiple times over a 6 month period. Each time, the volunteers were instructed to wash their hands at varying water temperatures—60 °, 79 ° or 100 °. They were also asked to use 0.5 ml, 1 ml or 2 ml volumes of soap.

Read more.

How safe are those home-delivery meal kits?

Research shows food safety gaps in home-delivery meal kits

Failure of cold-chain results in ready-to-cook meal kits with ‘microbial loads off the charts’

CHICAGO — A Rutgers University professor Thursday poured some cold water on those trendy ready-to-cook dinner packages being delivered to homes across America, especially those with meat included.

Speaking on the final day of  the 2017 Food Safety Summit in a session on “Home Delivery,” the professor of human ecology presented results of a Rutgers-Tennessee State University study that looked into the integrity of home-delivered dinners. Professor Bill Hallman said researchers placed orders for delivery of 169 meal kits, including entrees of 271 meat items, 235 seafood items, 133 game items, and 39 poultry items. What the researchers  found raised concerns about pathogens, packaging, labeling and cold-chain integrity.

The study also involved 1,002 interviews with consumers, and review of 427 domestic food delivery vendor websites.

Read more

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