Category Archives: Food Microbiology Research

Research – Belgian Salmonella outbreak traced to tartare sauce

Food Safety News

 

A Salmonella outbreak that sickened almost 200 people at a Belgian school was likely caused by eggs used to make a tartare sauce, according to authorities.

The Agency for Care and Health (Zorg en Gezondheid) and Federal Agency for the Safety of the Food Chain (FASFC) investigation detected Salmonella in the freshly prepared tartare sauce. Findings from an online survey of students and teachers also reached the same conclusion on the source.

The Agency for Care and Health had previously received information about a number of students from the school complaining of gastrointestinal illness.

Since Sept. 14, no new cases of illness have been reported so the Spermalie Hotel and Tourism School in Bruges has been allowed to resume normal operation.

About 200 students and teachers from the school became ill from Sept. 6 onward. Laboratory analyses of stool samples revealed students and teachers had been affected by Salmonella.

 

Australia – Byul Mi Kim Chi — Byul Mi Salted Clams 150g – Hepatitis A

ACCC

Photograph of Byul Mi Salted Clams 150g

What are the defects?

The recall is due to possible microbial (Hepatitis A virus) contamination.

What are the hazards?

Food products contaminated with Hepatitis A virus may cause illness if consumed.

What should consumers do?

Consumers must not eat this product and anyone concerned about their health should seek medical advice.

Return affected product to the place of purchase for a full refund.

Further information is available from Byul Mi Kim Chi on 0410 596 688.

Supplier
Byul Mi Kim Chi
Traders who sold this product

Korean grocery stores in NSW

Where the product was sold
New South Wales

Recall advertisements and supporting documentation

Coordinating agency

Food Standards Australia New Zealand is the coordinating agency for this recall.

Research – Control of pathogens in fresh pork sausage by inclusion of Lactobacillus sakei BAS0117

Canadian Journal of Microbiology

ABSTRACT

A pork sausage was produced with low sodium content (1.64%) to which Lactobacillus sakei was added with the aim of developing a meat pork sausage for cooking and having technological, organoleptic, and hygienic advantages. The lactic acid bacteria (LAB) L. sakeiLactococcus sp., and Pediococcus pentosaceus were submitted to extreme pH, temperature, and NaCl conditions. Lactobacillus sakei was used in pork sausage because of its resistance to different culture conditions and its antimicrobial potential. The food-borne pathogens Listeria monocytogenes Scott A, Enterococcus faecalis, and Staphylococcus aureus were used as indicator microorganisms to evaluate the antimicrobial activity of selected LAB strains. Salmonella enterica serotype Choleraesuis is a common pathogen of pigs. To the raw sausage product containing L. sakei and nonpathogenic endogenous microbiota, we added about >104 and <105 CFU/g of S. enterica serotype Choleraesuis to evaluate the inhibitory potential of L. sakei towards this pathogen. Salmonella Choleraesuis was inhibited in the presence of Lsakei over 7 days of storage of the meat product (about 3.0 log cycles reduction). Lactobacillus sakei significantly increased inhibition when compared with the nonfermented sausage. Thus, L. sakei BAS0117 played an important role as an additional hurdle in the fermented meat pork sausage during storage.

USA – Philadelphia mystery E. coli outbreak adds 19th Victim

Food Poison Journal

ecoli

Image CDC

According to Food Safety News, Philadelphia officials have added more people to the patient list in an E. coli outbreak that is associated with “shared restaurant exposure.”

Earlier this month the Philadelphia Department of Public Health reported the outbreak but did not name a specific restaurant or restaurants. The department continues to decline to provide that information.

“A total of 19 cases were identified in this cluster. The last report was received on Sept. 6, and our investigation into the source continues,” department spokesman James Garrow told Food Safety News.

Outbreak investigations typically involve interviews with patients to find out what they ate and where they ate it in the days before becoming ill.

UK – The BIJ: At least 100 cases of salmonella poisoning from British eggs

Poultry Med

 

Source: BIJ22 September, 2019

At least 100 cases of people have been poisoned after eating British eggs contaminated with one of the most dangerous forms of salmonella, The Bureau of Investigative Journalism can reveal, despite government assurances that the risk had been virtually eliminated.
There have been at least 100 cases recorded in the past three years, and 45 since January, in a major outbreak that health officials have traced back to contaminated eggs and poultry farms.
Despite outbreaks of this strain occurring for more than three years, the government has issued no public warnings about the safety of hens’ eggs. In 2017, the Food Standards Agency (FSA) told the public that it was safe for vulnerable people, including pregnant women, the elderly and children, to eat raw, runny or soft-boiled eggs. At the time the head of the FSA said: “The risk of salmonella is now so low you needn’t worry.” Internal records obtained by the Bureau show that 25 egg-laying poultry flocks in the UK have tested positive for salmonella this year. Seven were contaminated with the most serious strains of the bacteria, including Salmonella enteritidis, the strain behind this major outbreak. Two egg-packing factories – one of which supplies leading supermarkets – have also been contaminated.
Eggs from the infected flocks were kept from sale and either sent for processing to kill the bacteria or disposed of, while the birds were culled.
However, contaminated eggs still reached the public, with Public Health England (PHE) confirming 45 people had been poisoned since January. The exact route to the public is unclear. PHE told the Bureau it was not aware of any deaths.
An egg business that supplies major supermarkets is among those contaminated by the bug. One of Fridays Ltd’s egg-packing factories was temporarily closed this year to deal with salmonella, which has also been found on three farms that supply the business. The company, which produces 10m eggs a week, confirmed it had removed the farms from its supply chain and disinfected the factory.
Fridays said in a statement: “Like all responsible UK egg farmers and egg packers, we carry out regular testing of our firms and those of our suppliers … Salmonella occurs naturally in the environment. However, with regular precautionary testing, vaccination of hens and rigorous control procedures, its prevalence in farming can be minimised.” Public Health England told the Bureau that it had been investigating this strain of salmonella for three years. The Bureau has established that in 2018, 28 flocks tested positive for salmonella, four of them with dangerous strains.
This means that PHE knew of poisoning cases even as the FSA declared that almost all eggs produced in the UK were free of salmonella, and that it was safe once again for those vulnerable to infection to eat raw eggs.
In October 2017 the FSA said that the presence of salmonella in eggs had been “dramatically reduced” and that British Lion eggs – which make up about 90% of UK egg production – were safe to eat.
The FSA confirmed the outbreak to the Bureau.

USA – Surveillance for Foodborne Disease Outbreaks, United States, 2017 Annual Report

CDC

  • Highlights
  • In 2017, 841 foodborne disease outbreaks were reported, resulting in 14,481 illnesses, 827 hospitalizations, 20 deaths, and 14 food product recalls.
  • Norovirus was the most common cause of confirmed, single-etiology outbreaks, accounting for 140 (35%) outbreaks and 4,092 (46%) illnesses. Salmonella
    was the next most common cause, accounting for 113 (29%) outbreaks and 3,007 (34%) illnesses, followed by Shiga toxin-producing Escherichia coli, which caused 19 (5%) outbreaks and 513 (6%) illnesses, and Clostridium perfringens, which
    caused 19 (5%) outbreaks and 478 (5%) illnesses.
  • Mollusks (41 outbreaks), fish (37), and chicken (23) were the most common single food categories implicated. The most outbreak associated illnesses were from turkey (609 illnesses), fruits (521), and chicken (487).
  • As reported in previous years, restaurants (489) outbreaks, 64% of outbreaks for which a single location of preparation was reported), specifically
    restaurants with sit-down dining (366, 48%), were the most commonly reported locations of food preparation associated with outbreaks.

Research – How 26 Percent of Participants Transferred Bacteria from Raw Chicken to Their Salads

USDA

The debate on whether or not to wash raw poultry is a fierce one, but until recently it was not a debate backed by science. A recent study from the U.S. Department of Agriculture (USDA) further demonstrates that individuals are putting themselves at risk of illness when they wash or rinse raw poultry.

“During this year’s study, 26 percent of participants that washed raw poultry transferred bacteria from that raw poultry to their ready to eat salad lettuce,” said Dr. Mindy Brashears, the USDA’s Deputy Under Secretary for Food Safety. “Fortunately, small changes in the kitchen can lead to big health benefits for you and your family. Not washing meat and poultry reduces your risk of cross-contamination and can keep your family safe from foodborne illness.”

Many individuals may be unknowingly contaminating foods and causing illness for themselves or their family members. The good news is that the USDA has a few easy options to help prevent illness when you are preparing meat and poultry.

  • Significantly decrease your risk by preparing foods that will not be cooked, such as vegetables and salads, BEFORE handling and preparing raw meat and poultry.
    • Of the participants who washed their raw poultry, 60% had bacteria in their sink after washing or rinsing the poultry. Even more concerning was that 14% of participants still had bacteria in their sinks after they attempted to clean the sink.
  • Thoroughly clean and sanitize ANY surface that has potentially touched or been otherwise contaminated from raw meat and poultry, or their juices.
    • Of the participants that did not wash their raw poultry, 31% still managed to get bacteria from the raw poultry onto their salad lettuce.
    • This high rate of cross-contamination was likely due to a lack of effective handwashing and contamination of the sink and utensils.
      • Clean sinks and countertops with hot soapy water and then apply a sanitizer.
      • Use one cutting board for raw meat and poultry a different one for fruit, vegetables and cooked foods.
      • Wash hands immediately after handling raw meat and poultry. Wet your hands with water, lather with soap and then make sure you scrub your hands for 20 seconds.
  • Destroy any illness causing bacteria by cooking meat and poultry to a safe internal temperature as measured by a food thermometer.
    • Beef, pork, lamb and veal (steaks, roasts and chops) are safe to eat at 145°F.
    • Ground meats (burgers) are safe to eat at 160°F.
    • Poultry (whole or ground) are safe to eat at 165°F.
      • Washing, rinsing, or brining meat and poultry in salt water, vinegar or lemon juice does not destroy bacteria.

If you would like to talk about different options for preventing foodborne illness, you are in luck! You can call the USDA Meat and Poultry Hotline (1-888-674-6854) Monday through Friday, from 10 a.m. to 6 p.m. ET, or email or chat at AskKaren.gov.

Research – Soy Nut Butter E. coli O157:H7 Outbreak Studied in Journal of Pediatrics

Food Poisoning Bulletin

The Journal of Pediatrics has published a study on the 2017 soy nut butter E. coli O157:H7 outbreak that sickened 32 people, mostly children, in 12 states. That outbreak was linked to I.M. Healthy SoyNut Butter, which is used as a substitute for peanut butter in many daycare settings and schools around the country.

Australia – How a frozen meringue led investigators to the source of a potent Salmonella outbreak

ABC Net

When people started getting sick from a particularly potent strain of salmonella last year, a team of experts rushed to try to trace the source of the outbreak.

Key points:

  • Salmonella enteritidis (SE) is worse than other forms of the bacteria because it infects the hen’s ovaries, meaning the bacteria is deposited inside eggs
  • Other forms of salmonella are just found on the outside of eggs and human illness can be avoided by washing them and discarding those with cracked shells
  • SE is found in egg industries around the world, but until last year Australian farms were free of the harmful bacteria

Investigation is the key to managing and containing an outbreak’s impact — for consumers, farmers and entire industries, which can be brought to their knees if things go badly.

But investigators depend on people’s memories of what they’ve eaten, making it a seemingly impossible task.

A few weeks after being interviewed, one of those people remembered they had a frozen meringue cake in their freezer, leftover from a birthday party, around the time they got sick.

Officers went to that person’s home, collected the cake and had it tested.

“We were able to isolate the salmonella enteritidis and it had that same whole genome sequence. At the same time we could see who manufactured that cake,” Ms Szabo said.

HPS publishes annual surveillance reports for Cryptosporidium, Giardia and Cyclospora in Scotland, 2018

HPS

 

Article: 53/3701

On 17 September 2019, Health Protection Scotland (HPS) published annual surveillance reports for laboratory-confirmed cases of:

  • Cryptosporidium – In 2018, HPS received 536 laboratory reports of Cryptosporidium. This represents an increase of 27 reports (5.3%) when compared with 2017 (509 reports), but is within the year-on-year variation observed in Cryptosporidium as reported in the previous ten years.
  • Giardia – In 2018, HPS received 199 laboratory reports of Giardia, which represents a decrease of 70 reports (26.0%) when compared with 2017 (269 reports).
  • Cyclospora – A total of 12 laboratory reports of Cyclospora were received by HPS in 2018, compared with 46 in 2017, 167 in 2016, 24 in 2015 and two in 2014.