Category Archives: Salmonella

USA – University of Maryland – Salmonella Outbreak

Health UMD

kswfoodworld Salmonella

Image CDC

As of today, we are aware of three UMD students who have been identified with Salmonella, two confirmed at outside medical facilities and one at the University Health Center. The source of the infection is not yet clear – two of the three individuals have eaten at a variety of campus dining facilities and one has not eaten on campus at all.  The three students who were identified with this infection have fully recovered without incident.  The Prince George’s County Health Department and the Maryland Department of Health are looking into these incidents to form a better understanding of any potential source.

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.

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.

RASFF Alerts – Salmonella – Chilled Pork Shoulder – Sesame Seeds – BBQ Chicken Wings – Chicken Wings – Chicken Breast – Chicken Fillet – Poultry Meat – MSM Chicken -Frozen Mixed Turkey and Lamb Shawarma – Oregano

Last two weeks catch up.

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RASFF – Salmonella enterica ser. Typhimurium (in 1 out of 5 samples /25g) in chilled pork boneless shoulder from Spain in Italy

RASFF – Salmonella (presence /25g) in sesame seeds from Sudan in Greece

RASFF – Salmonella (in 5 out 5 samples /25g) in barbecue chicken wings from Slovenia in Croatia

RASFF – Salmonella enterica ser. Infantis (presence /25g) in chilled chicken breasts from Poland in the Czech Republic

RASFF – Salmonella enterica ser. Enteritidis (presence /25g) in chilled chicken breast from Poland in the Czech Republic

RASFF – Salmonella (presence /25g) in whitish sesame seeds from Sudan in Greece

RASFF – Salmonella (presence /25g) in chilled chicken fillet from Poland in Poland

RASFF – Salmonella enterica ser. Enteritidis (presence /25g) in chilled chicken breast slices from Italy, with raw material from Germany in Italy

RASFF – Salmonella (in 1 out of 5 samples /25g) in sesame seeds from Sudan in Greece

RASFF – Salmonella (presence /25g) in sesame seeds from Sudan in Greece

RASFF – Salmonella (presence /25g) in chilled poultry meat from Poland in Poland

RASFF – Salmonella enterica ser. Infantis (presence /25g) in frozen mechanically separated (MSM) chicken meat from Spain in France

RASFF – Salmonella (in 5 out of 5 samples /25g) in frozen mixed turkey and lamb shawarma from the Netherlands in the Netherlands

RASFF – Salmonella enterica ser. Potsdam (present /25g) in oregano from Turkey in Germany

RASFF Alert – Foodborne Outbreak suspected Salmonella – Chilled Raw Minced Horse Meat

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RASFF – foodborne outbreak suspected (Salmonella enterica ser. Bovismorbificans) to be caused by chilled raw minced horse meat from Romania, via Belgium in France

RASFF Alerts – Animal Feed – Salmonella – Frozen Sausages – Dog Chews – Rapeseed Meal – Rape Seed Expeller -Lamb Meal – Pig Ears -Palm Flakes

Last two weeks catch up.

RASFF-Logo

RASFF – Salmonella (1 out of 5 samples /25g) in frozen sausages for dogs from Croatia in Croatia

RASFF – Salmonella enterica ser. Infantis (in 1 out of 5 samples /25g) in dog chews from Germany in Austria

RASFF – Salmonella group E4 (presence /25g) in rapeseed meal from Ukraine in Poland

RASFF – Salmonella enterica ser. Mbandaka (presence /25g) in rape seed expeller from Estonia in Finland

RASFF – Salmonella enterica ser. Brandenburg (presence /25g) and Salmonella enterica ser. Derby (presence /25g) in lamb meal from New Zealand in Belgium

RASFF – Salmonella enterica ser. Kottbus (presence /25g) in rapeseed meal from Germany in Finland

RASFF – Salmonella (presence /25g) in dog chews from Germany in Germany

RASFF – Salmonella (presence /25g) in dog chews from the Netherlands in Germany

RASFF – Salmonella (presence /25g) in pig ears from Poland in Germany

RASFF – Salmonella enterica ser. Mbandaka (presence /25g) in palm flakes from the Netherlands in Belgium

 

 

Research – Inactivation of Salmonella, Listeria monocytogenes and Enterococcus faecium NRRL B-2354 in a selection of low moisture foods

Science Direct

Highlights

Pathogens or surrogate survived well in samples during storage (21 days at 16 °C).

Heat resistance did not change significantly throughout the storage period.

Viability of pathogens or surrogate was adequate for inactivation/validation studies.

E. faecium NRRL B2354 was a suitable surrogate in tested products except confectionery.

Pathogens were inactivated by heating to 112 °C solid foods in sealed thermal cells.

Abstract

The aims of this study were to obtain data on survival and heat resistance of cocktails of SalmonellaListeria monocytogenes and the surrogate Enterococcus faecium(NRRL B-2354) in four low moisture foods (confectionery formulation, chicken meat powder, pet food and savoury seasoning) during storage before processing. Inoculated samples were stored at 16 °C and cell viability examined at day 0, 3, 7 and 21. At each time point, the heat resistance at 80 °C was determined. The purpose was to determine a suitable storage time of inoculated foods that can be applied in heat resistance studies or process validations with similar cell viability and heat resistance characteristics. The main inactivation study was carried out within 7 days after inoculation, the heat resistance of each bacterial cocktail was evaluated in each low moisture food heated in thermal cells exposed to temperatures between 70 and 140 °C. The Weibull model and the first order kinetics (D-value) were used to express inactivation data and calculate the heating time to achieve 5 log reduction at each temperature.

Results showed that the pathogens Salmonella and Lmonocytogenes and the surrogate E. faecium NRRL B-2354, can survive well (maximum reduction < 0.8 log) in low moisture foods maintained at 16 °C, as simulation of warehouse raw material storage in winter and before processing. The D80 value of the pathogens and surrogate did not significantly change during the 21 day storage (p > 0.05). The inactivation kinetics of the pathogens and surrogate at temperatures between 70 and 140 °C, were different between each organism and product. E. faecium NRRL B-2354 was a suitable Salmonella surrogate for three of the low moisture foods studied, but not for the sugar-containing confectionery formulation. Heating low moisture food in moisture-tight environments (thermal cells) to 111.2, 105.3 or 111.8 °C can inactivate 5 log of SalmonellaL. monocytogenes or E. faecium NRRL B-2354 respectively.

Research – Comparison of pH effects on ohmic heating and conventional heating for inactivation of Escherichia coli O157:H7, Salmonella enterica Serovar Typhimurium and Listeria monocytogenes in orange juice

Science Direct

Highlights

Effect of pH on ohmic heating compared to conventional heating was investigated.

Adjusting pH has significant effect on the heating rate of ohmic heating.

Unusual tendency of pathogen inactivation was identified in ohmic heating.

Quality aspects of samples were not severely degraded regardless of pH.

Abstract

The objective of the current study is to identify the influence of acidity on ohmic heating compared to conventional heating for inactivation of food-borne pathogensin orange juice. For conventional heating, the heating rate was not significantly different (P > 0.05) regardless of pH and pathogens were inactivated more effectively at lower pH. However, different patterns were observed for ohmic heating. Although temperature and electrical conductivity were not greatly affected by lowering pH, temperature increased more rapidly with increasing pH due to higher electrical conductivity. Also, the inactivation patterns were significantly different (P < 0.05) from conventional heating. While Salmonella Typhimurium was inactivated most rapidly at pH 2.5, Escherichia coli O157:H7 and Listeria monocytogenes were inactivated most rapidly at pH 4.5. When pathogens were exposed to each heating method at a fixed temperature, additional effects of ohmic heating were not observed. Also, the overall quality of orange juice subjected to ohmic heating was not greatly affected at any pH level. Therefore, increasing as well as lowering pH can also be considered effective ways to optimize pasteurization of orange juice when using ohmic heating. The different characteristics of ohmic heating compared to conventional heating indicate the necessity of a new approach.

USA – MDH Sambar Masala recalled for Salmonella risk

Food Safety News Screen Shot 2019-09-08 at 5.17.26 PM

House of Spices (India), packaging products under MDH brand names, is recalling various lots of “MDH SAMBAR MASALA” because of the risk of Salmonella contamination, according to a  recall notice posted on the FDA’s website.

The recalled product, produced by R-Pure Agro Specialities and distributed by House of Spices (India), were sold in retail grocery stores in Northern California.