Don’t care, use a thermometer: Burger secret sweeping America

Common belief has been, according to Tristan Lutze, a Sydney-based food writer, that a good burger patty should be fat, juicy and pink inside. To cook it perfectly, you need a nicely oiled grill and a careful hand, taking care to never press on the burger and squeeze out those delicious juices.

ultrasmash.burgerColor is a lousy indicator and a tip-sensitive digital thermometer is required.

But there’s something of a burger rebellion happening on America’s east coast, and it’s beginning to spread.

The secret is a technique called “ultra-smashing”, a phrase coined by The Food Lab for a process that’s being used by burger superstars Harlem Shake in NYC, and the obsession-worthy Shake Shack.

With just a couple of pieces of equipment and a small piece of meat, it creates a flavour-packed burger in under a minute. Yes, in less than 60 seconds.

All you need is:

— A stainless steel pan, or BBQ hotplate. Your favourite non-stick pan WON’T work here.

— Any tool that will help you press down on the meat as hard as possible once it’s on the pan. A (new, washed) $10 stainless steel plastering trowel from a hardware store is perfect, and capable of much more pressure than a kitchen spatula.

— A scraper to dislodge the meat from the pan. A steel pastry scraper will work, but a joint knife or scraper from the hardware store is even better.

Heat the unoiled pan to nearly smoking and roll your mince (the fattier the better) into a 5cm diameter ball. Place the meat into the centre of the pan and immediately press down on the patty with the trowel or spatula, applying extra pressure with the scraper if needed.

Keep pushing as hard as you can until the meat is only a few millimetres thick.

Whatever the technique, a tip-sensitive digital thermometer, inserted sideways in this case, is still required.

Blame celebrity chefs and lack of thermometer use: Campy increases in undercooked chicken livers

In the United Kingdom, outbreaks of Campylobacter infection are increasingly attributed to undercooked chicken livers, yet many recipes, including those of top chefs, advocate short cooking times and serving livers pink.

chicken-liver-pate-2During 2015, we studied preferences of chefs and the public in the United Kingdom and investigated the link between liver rareness and survival of Campylobacter. We used photographs to assess chefs’ ability to identify chicken livers meeting safe cooking guidelines.

To investigate the microbiological safety of livers chefs they preferred to serve, we modeled Campylobacter survival in infected chicken livers cooked to various temperatures. Most chefs correctly identified safely cooked livers but overestimated the public’s preference for rareness and thus preferred to serve them more rare.

We estimated that 19%–52% of livers served commercially in the United Kingdom fail to reach 70°C and that predicted Campylobacter survival rates are 48%–98%. These findings indicate that cooking trends are linked to increasing Campylobacter infections.

Restaurant cooking trends and increased risk for Camplyobacter infection

Emerging Infectious Disease Journal, Volume 22, Number 7, July 2016, DOI: 10.3201/eid2207.151775

A.K. Jones, D. Rigby, M. Burton, C. Millman, N.J. Williams, T.R. Jones, P. Wigley, S.J. O’Brien, P. Cross

http://wwwnc.cdc.gov/eid/article/22/7/15-1775_article

Burgers may need higher cooking temperature to be safe from E. coli

Food safety friend Lynn McMullen at the University of Alberta, and others have found that cooking ground beef at 71C — the level of heat long advised by Health Canada — does not always eliminate all the strains of Escherichia coli.

mcmullen.e.coli.hamburger“We’ve been hammering consumers for years to cook chicken properly, to handle it properly, and to do the same with ground beef but still we seem to have these outbreaks of E. coli (attributed to hamburgers),” said food microbiologist McMullen.

“Does this explain why? It might.”

McMullen, fellow food microbiologist Michael Gänzle, and several graduate students, first became aware of the inconsistent behaviour of E. coli eight years ago.

For decades, scientific papers about the thermal killing of microorganisms have noted that there were sometimes survivors. But little attention was paid to that information until 2008, when McMullen and Gänzle assigned a student to look for differences in thermal survival amongst organisms in a large collection of E. coli from beef, which the U of A happens to house.

The first student, Elena Dlusskaya, showed that one organism had survived for 70 minutes at 60C. Both professors felt her study must be flawed, because most E. coli are killed just a few seconds after such heat application. Repeating her experiments twice produced the same odd results.

Then Dlusskaya compared her cultures to those from other labs, which already had published survival values. Again, she found that some of the U of A’s cultures were behaving differently.

“These organisms aren’t supposed to survive, but every once in a while they do,” said McMullen. “So we decided to find out why. We looked at the genomes to see what was different.”

Working with postdoctoral fellow Ryan Mercer, they discovered a suite of 16 genes that are found only in the highly heat-resistant strains of E. coli under wet conditions (i.e. fresh meat). This genomic grouping is called the locus of heat resistance, or LHR.

Hunting through the genome databases for LHR, they saw that it exists in about two per cent of all E. coli in the databases and is present in both the harmless and pathogenic strains.

barfblog.Stick It In“If it’s in two per cent of all E. coli, and in pathogenic E.coli, there’s the potential that a pathogen could survive the standard cooking protocols for ground beef. It could mean we have to change the guidelines for cooking meat, because 71C may not be enough.”

Salt also makes E. coli bacteria heat resistant, though McMullen and the other researchers don’t know why.

Though McMullen and the other researchers haven’t discovered what temperature will ultimately kill all E. coli, McMullen recommended using a thermometer and cooking meat at 71 C to 73 C. “It doesn’t matter when you’re grilling any ground meat, you should be using a thermometer.”

Genetic determinants of heat resistance in Escherichia coli

Front Microbiol. 2015; 6: 932.

Published online 2015 Sep 9. doi:  10.3389/fmicb.2015.00932

Ryan G. Mercer, Jinshui Zheng, Rigoberto Garcia-Hernandez, Lifang Ruan, Michael G. Gänzle, and Lynn M. McMullen

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4563881/

Escherichia coli AW1.7 is a heat resistant food isolate and the occurrence of pathogenic strains with comparable heat resistance may pose a risk to food safety. To identify the genetic determinants of heat resistance, 29 strains of E. coli that differed in their of heat resistance were analyzed by comparative genomics. Strains were classified as highly heat resistant strains, exhibiting a D60-value of more than 6 min; moderately heat resistant strains, exhibiting a D60-value of more than 1 min; or as heat sensitive. A ~14 kb genomic island containing 16 predicted open reading frames encoding putative heat shock proteins and proteases was identified only in highly heat resistant strains. The genomic island was termed the locus of heat resistance (LHR). This putative operon is flanked by mobile elements and possesses >99% sequence identity to genomic islands contributing to heat resistance in Cronobacter sakazakii and Klebsiella pneumoniae. An additional 41 LHR sequences with >87% sequence identity were identified in 11 different species of β- and γ-proteobacteria. Cloning of the full length LHR conferred high heat resistance to the heat sensitive E. coli AW1.7ΔpHR1 and DH5α. The presence of the LHR correlates perfectly to heat resistance in several species of Enterobacteriaceae and occurs at a frequency of 2% of all E. coli genomes, including pathogenic strains. This study suggests the LHR has been laterally exchanged among the β- and γ-proteobacteria and is a reliable indicator of high heat resistance in E. coli.

National Chicken Council petitions FSIS for labelling law for frozen chicken thingies

Labels aren’t the same as risk communication. And it’s not clear how effective they are as behavior change vehicles.

Information and safe handling labels can provide the basics, if developed in a science-based manner, but as the National Advisory Committee on Meat and Poultry Inspection said in 2014, risk communication folks should really be involved in message crafting and evaluating effectiveness.

The frozen chicken thingie outbreaks are starting to matter. Like these two in 2015.Barber-Foods-stuffed-chicken-breasts

In an effort to ensure safe eating experiences and address potential consumer confusion, the National Chicken Council (NCC) has petitioned the US Department of Agriculture’s Food Safety and Inspection Service (FSIS) for mandatory labelling of raw, stuffed chicken products that may appear cooked and ready-to-eat.

Specifically, NCC is requesting that the agency take the following actions:

Conduct a rulemaking to adopt a regulation requiring that not-ready-to-eat stuffed chicken breast products that appear ready-to-eat be prominently and uniformly labelled to clearly inform consumers that the products are raw and how to properly handle and cook them; and

Publish a Compliance Guideline explaining how to validate cooking instructions for not-ready-to-eat stuffed chicken breast products that appear ready-to-eat, which incorporates NCC’s “Best Practices for Cooking Instruction Validation for Frozen NRTE Stuffed Chicken Breast Products.”

“NCC increasingly is aware that some consumers may be uncertain of the proper handling and cooking methods for not-ready-to-eat stuffed chicken breast products that may appear ready-to-eat, and the proposed measures are necessary to ensure proper handling and cooking of these products,” said NCC President Mike Brown in the petition.

“This labelling would clearly inform consumers that these products are raw and require proper cooking while providing specific and uniform instructions on how to cook the products.”

FSIS has had labeling guidance out for a while. Making it a rule will help with consistency of info but it’s not a magic bullet.

Oh, and this:

Self-reported and observed behavior of primary meal preparers and adolescents during preparation of frozen, uncooked, breaded chicken products
01.nov.09
British Food Journal, Vol 111, Issue 9, p 915-929
Sarah DeDonder, Casey J. Jacob, Brae V. Surgeoner, Benjamin Chapman, Randall Phebus, Douglas A. Powell
http://www.emeraldinsight.com/Insight/viewContentItem.do;jsessionid=6146E6AFABCC349C376B7E55A3866D4A?contentType=Article&contentId=1811820
Abstract:
Purpose – The purpose of the present study was to observe the preparation practices of both adult and young consumers using frozen, uncooked, breaded chicken products, which were previously involved in outbreaks linked to consumer mishandling. The study also sought to observe behaviors of adolescents as home food preparers. Finally, the study aimed to compare food handler behaviors with those prescribed on product labels.
Design/methodology/approach – The study sought, through video observation and self-report surveys, to determine if differences exist between consumers’ intent and actual behavior.
Findings – A survey study of consumer reactions to safe food-handling labels on raw meat and poultry products suggested that instructions for safe handling found on labels had only limited influence on consumer practices. The labels studied by these researchers were found on the packaging of chicken products examined in the current study alongside step-by-step cooking instructions. Observational techniques, as mentioned above, provide a different perception of consumer behaviors.
Originality/value – This paper finds areas that have not been studied in previous observational research and is an excellent addition to existing literature.

Hucksters abound: orangoutangs and gluten instead of real food safety

I learned so much from Dr. Jonny Bower, PhD’s KCRA segment on food safety for grilling.

Like preserving orangoutang habitats. Marinade to stay safe from acrylamide. Protect against gluten. Use a proprietary blend of probiotics. Add lots of spices.Screen Shot 2016-05-23 at 2.46.38 PM

Too bad the good doctor didn’t mix in a thermometer. Or talk about cross-contamination.

I couldn’t get the video to embed, check out the full segment here.

Food Safety Talk 100: No buns in the bathroom

Food Safety Talk, a bi-weekly podcast for food safety nerds, by food safety nerds. The podcast is hosted by Ben Chapman and barfblog contributor Don Schaffner, Extension Specialist in Food Science and Professor at Rutgers University.  Every two weeks or so, Ben and Don get together virtually and talk for about an hour.1459283728049

They talk about what’s on their minds or in the news regarding food safety, and popular culture. They strive to be relevant, funny and informative — sometimes they succeed. You can download the audio recordings right from the website, or subscribe using iTunes.1461946810971

Episode 100 can be found here and on iTunes.

Here is a bulleted list of link to the topics mentioned on the show:

Trump, castes, and microbial food safety

Roberto A. Ferdman and Christopher Ingraham, reporters for the Washington Post, write there are few things as regrettable as a steak well done.

idiocracy_thumbCooking meat to the point of leathery toughness dulls the flavor, among many other things. “Forgive my snobbishness, but well-done meat is dry and flavorless,” Mark Bittman wrote in 2007, imploring people to serve hamburgers “rare, or at most medium rare.”

What Bittman actually said was, “if you grind your own beef, you can make a mixture and taste it raw,” adding that, “To reassure the queasy, there’s little difference, safety-wise, between raw beef and rare beef: salmonella is killed at 160 degrees, and rare beef is cooked to 125 degrees.”

This is food safety idiocracy: Using Bittman to prop up an argument is silly.

The authors continue by commenting on the gastro habits of Donald Trump, who apparently likes his steak well-done.

This, more than anything else Trump has ssaid or done, brings him into ridicule.

A 2014 survey by 538 found that fully one-quarter of Americans said they liked their steak done “well” or “medium-well.”  Is this Trump’s base? Hard to tell, since there weren’t enough steak-eaters in the 538 survey to break out demographic groups. But we can turn instead to a 2012 60 Minutes/Vanity Fair survey that asked 1,000 Americans how they liked their burgers done.

The results shock the conscience. Thirty-six percent of respondents said they liked their burgers well done, making that the most popular response. Another 29 percent liked medium burgers, 19 percent prefer medium-rare, and only 4 percent cook their burgers rare.

Digging into the demographics, a few interesting patterns stand out. First, preference for overcooked meat is strongly correlated with age. Forty-six percent of senior citizens prefer their burgers well done, compared to only 27 percent of those aged 18 to 29.

The less-educated are also more likely to prefer well done burgers – 47 percent of those with a high school education or less like their burgers well done, compared to only 25 percent of those with a college or advanced degree.

barfblog.Stick It InThere’s a similar relationship with income, with people in higher-income households less likely to overcook their burgers than people in low-income households.

These are the same demographics as anti-vaxxers, raw-milk connoisseurs and anti-GMO types.

And surveys still suck.

Hamburger should be cooked to 165F, steak 140F, as verified with a tip-sensitive digital thermometer.

No amount of flowery put-downs or caste-style insults will change the safety data.

Thermometers an afterthought: UK wants views on rare burgers advice

The UK Food Standards Agency has made a begrudgingly acknowledgement to thermometers, but still insists on color to tell if burgers are done.

barfblog.Stick It InThe growing popularity of burgers served pink has led the FSA to develop the advice on rare burgers. It is aimed at helping businesses meet consumer demand for rare burgers while keeping customers protected. Burgers that aren’t thoroughly cooked can contain bacteria that cause food poisoning if the right controls aren’t in place.

In September 2015, the FSA Board agreed a number of controls that food businesses serving burgers pink will need to have in place to demonstrate that they are maintaining customer safety. The new advice sets the options out and they include:

  • sourcing the meat only from establishments which have specific controls in place to minimise the risk of contamination of meat intended to be eaten raw or lightly cooked;
  • ensuring that the supplier carries out appropriate testing of raw meat to check that their procedures for minimising contamination are working;
  • sStrict temperature control to prevent growth of any bugs and appropriate preparation and cooking procedures;
  • notifying their local authority that burgers that aren’t thoroughly cooked are being served by the business; and,
  • providing advice to consumers, for example on menus, regarding the additional risk.

chipotle.BSThe draft advice is for caterers and local authorities only and the FSA’s long-standing advice to consumers is unchanged: burgers prepared at home should be cooked thoroughly until they are steaming hot throughout, the juices run clear and there is no pink meat left inside. If using a temperature probe or cooking thermometer, make sure the middle of the burgers reaches a temperature of 70⁰C for 2 minutes.

hamburger-safe and unsafe-thumb-450x138-175

Everyone’s got a camera: California uni receives A rating after alleged raw chicken is served

The Cal State Fullerton Gastronome maintained an “A” food safety rating following an inspection conducted after reports of undercooked chicken.

According to the CSUF Food Facility Inspection Reports, conducted by the Department of Risk Management and Environmental Health & Safety, Inspector Justine Baldacci carried out the Feb. 24 inspection three days after students lodged complaints.

Baldacci also performed the Gastronome’s last inspection on July 28, 2015. The dining facility received a score of 95. The department scheduled a reinspection date for Nov. 20, 2015. However, no inspection report for November was filed on the CSUF Risk Management and Environmental Health & Safety website.

The most recent inspection report states that Baldacci inspected the facility following a report of allegedly undercooked chicken served to a customer.

cooked.chickenThe inspection found that “the processes, procedures and record keeping for batch cooking were reviewed with management and found to be adequate.”

The incident that caused the complaint took place Sunday, Feb. 21, when students said the chicken they were served for dinner was undercooked.

Elana Stein, 18, posted a picture of the chicken she said was undercooked on the Gastronome’s Facebook page and sent a complaint with the pictures of the alleged raw chicken to Rhonda Robinson, manager of the Gastronome.

Color is a lousy indicator of safety. Use a thermometer and stick it in.

barfblog.Stick It In

Food is getting safer, but still might make you sick

Scott Canon of The Kansas City Star writes in a good food safety feature, go ahead and eat out. Or eat in (edited excerpts below).

produceWhether you dig into Mom’s casserole, feast on the local diner’s daily special or snarf up something from a mega-corporation’s drive-through, America’s meals may arrive as safe now as mankind has ever known.

Just not 100 percent.

Government rules continue to tighten. Various industries, fearful of lawsuits and the lost business that follows bad publicity, put more muscle into keeping things clean.

Yet experts also describe an increasingly elaborate system that tests the power to keep a meal safe.

“The marketplace is probably more complex,” said Charles Hunt, the Kansas state epidemiologist. “The produce that you get in the store today was in Mexico or someplace else just a few days before.”

The Chipotle chain saw multiple, high-profile problems last year. An E. coli outbreak traced to its restaurants in October. In December, the company also was tied to a norovirus incident in Boston, following outbreaks of the pathogen earlier in the year at outlets in California and Minnesota.

In the Kansas City area, more than 600 people got sick after attending shows at the New Theater Restaurant in January, and tests confirmed infections of the norovirus in at least some. It also struck at least 18 staff and patients at the University of Kansas Hospital’s Marillac Campus that month. And about a dozen people were hit with the same vomiting and diarrhea shortly afterward at a Buffalo Wild Wings in Overland Park.

Upticks in detections of outbreaks of food-borne illness, analysts say, likely reflect our increasing powers to spot them — not a growing danger.

In 1998, the U.S. Food and Drug Administration traced an outbreak of salmonella agona to a Malt-O-Meal processing plant in Minnesota. Ten years later, the same plant again shipped out cereal tainted with salmonella, sickening at least 33 people.

With the two incidents separated by a decade, any link seemed coincidental.

But a few years later, the FDA built a powerful tool for analyzing bacterial strains — Whole Genome Sequencing. It can identify down the lineage of any bacterium in its database. In this case it showed the new salmonella was the direct descendant of the earlier one.

barfblog.Stick It InIt turned out that the first outbreak stemmed from contaminated water used to clean the plant during a renovation. That same water was mixed in with mortar for the construction. Dangerous salmonella had been preserved in that mortar. Over the years, the surface of the mortar turned to dust, got wet and gave new life to that distinct family of salmonella.

Imagine the implications. The plant could prevent repeats by painting a sealant over the unlikely culprit — mortar in its walls.

But think of the child who becomes sick down the road with salmonella. The source could be any of thousands of ingredients consumed by an American kid in a normal day. But what if a doctor shares the salmonella sample with federal disease trackers? By looking at the particular genetic line, scientists can spot the family tree and the likely source.

“It tells you who’s related to who even over many years,” said Eric Brown, the director of the Division of Microbiology at the FDA’s Center for Food Safety & Applied Nutrition.

Technology, food safety experts say, only goes so far.

The bigger payoffs come from diligence. That means, foremost, avoiding contamination from feces.

“Our food safety starts on the farm,” said Doug Powell. A former Kansas State University professor of food safety, he’s now the chief author of barfblog.

“It has to be systemic, repeated and relevant.”

For starters, farmers should not use manure on fresh produce. They need to know where their irrigation supply comes from and whether runoff during heavy rains travels from feedlots or other places where livestock or farm workers defecate. Washing those fruits and vegetables later down the line is necessary, but that often can’t overcome massive exposure to E. coli and other potentially fatal bacteria that thrive in poop.

Bill Marler, a Seattle attorney who’s made a high-profile career filing lawsuits in food-borne illness cases, speaks with less alarm about the direction of Big Meat.

After years of restaurants and meat packers weathering expensive lawsuits and public relations disasters, he said, they’ve changed.

Take the slaughterhouse. Cattle arrive splattered with barnyard waste. For years, that created problems because the tainted hides would inevitably taint the skinned carcasses. But now, packing operations routinely steam-clean or treat the carcasses with an acid wash.

“You started to see an amazing turnaround and recalls linked to hamburger have fallen like a stone,” Marler said.

Meantime, he said, restaurants better recognize the business risk of not killing pathogens that cling to meat. Marler said big chains, in particular, devote increasing effort to thoroughly cooking beef, pork and poultry.

And federal rules on the required temperature for cooked meat have increased. Some chains, such as Taco Bell, now cook meat at centralized locations before shipping it to franchises. The local teenager preparing that food for customers still needs to be wary of temperature control, but much of the responsibility for safety has been standardized by corporate operations.

Produce, he and others say, poses a more difficult problem. Food that’s not cooked lacks the critical “kill step” to render harmless the bacteria that do slip through.

That, goes the critique, sets up a corporate culture that valued freshness over safety.

The company has responded by shutting down its restaurants repeatedly for special training days and saying its redoubled efforts to track the practices of its suppliers.

(Many have noted that much of Chipotle’s problems related to contamination from sick workers, not from its pursuit of freshness. More on that later.)

food-handler-card-skillsBut consumers have shown an increasing interest in the source of their food, preferring fresh over processed and local or organic over cheaper commodity ingredients. That’s tied, analysts say, to the belief that food made on a smaller scale and without the use of antibiotics in livestock or pesticides in crops is safer.

Some evidence suggests that such methods provide a more nutritious meal that may avoid long-term health risks. Yet they can pose new challenges in dodging food-borne pathogens in the short term, said barfblog’s Powell and others.

“Natural, organic, sustainable, dolphin-free — those are lifestyle choices,” Powell said. “There’s been no study that has conclusively said one way or another if it’s more likely to make you barf more.”

He worries it might. Smaller farms might not have the resources, or the sophistication, to keep soiled rain runoff from their vegetable patches. The farmer’s market customers or restaurants drawn to their farm-to-plate marketing, he said, might be less inclined to question safety.

“McDonald’s has it covered,” Powell said. “At the boutique places, I say I want my meat cooked to 165 degrees and they look at me like I just came off the turnip truck.”