Category Archives: pathogenic

Research – Application of a Novel Lytic Podoviridae Phage Pu20 for Biological Control of Drug-Resistant Salmonella in Liquid Eggs

MDPI

kswfoodworld Salmonella

Salmonella is a globally distributed zoonotic pathogen. Among them, S. Pullorum is a host-specific pathogen that seriously affects the development of the poultry breeding industry in China. It mainly infects chickens and can cause white scabs, and the mortality rate after infection is almost 100%. As antibiotics are widely used in animal feed and other production processes, Salmonella resistance has gradually increased. Therefore, there is an increasing need to develop new technologies to control multi-drug resistant (MDR) pathogens and confirm their actual effectiveness in the target food matrix. Bacteriophage can efficiently and specifically lyse bacteria, and will be a potential bactericide to replace antibiotics. In this study, 34 strains of Salmonella bacteriophages were isolated from environmental resources. Therein, phage Pu20 with the widest host spectrum had the strongest ability to lyse tested Salmonella strains. Further studies showed that Pu20 had high pH tolerance and heat resistance, short incubation period. Pu20 can effectively inhibit the growth of two strains of MDR Salmonella in liquid egg white and yolk at 4 ℃ and 25 ℃, respectively. According to morphological and phylogenetic analysis, Pu20 belongs to the Podoviridae family. Genomic analysis of Pu20 indicates a linear 59435 bp dsDNA sequence with no homology to virulence or antibiotic resistance-related genes. Together, these results sheds light on the potential biocontrol application value of Pu20 in food products.

Research – Special Issue: Shiga Toxin-Producing Escherichia coli

MDPI

Globally, Shiga toxin-producing Escherichia coli (STEC) is an important cause of diarrheal disease, most notably hemorrhagic colitis, and post-diarrheal sequela, such as hemolytic-uremic syndrome (HUS) [1]. Cattle are a major reservoir of STEC, with approximately half of the cases in humans attributable to foodborne exposure [2]. Prevention of human illness has mainly been through food safety measures [2]. Despite extensive research, no other generally accepted and effective preventive measures or therapies for STEC infections in human patients are available [3]. Many questions remain about STEC virulence factors, pathogenesis, detection, and other aspects that necessitate a continuation of basic and applied research on a wide front. This Special Issue includes 14 papers (nine articles, two communications, one review, one comment, and one reply) that collectively provide novel information on the epidemiology [4,5,6,7], virulence factors [7,8,9,10], and pathogenesis [11,12,13] of STEC, and the molecular structure or toxicity [14,15,16] and immunodetection [17] of Shiga toxin.

Research – Growth and Survival of Foodborne Pathogens during Soaking and Drying of Almond (Prunus dulcis) Kernels

Journal of Food Protection

ABSTRACT

The practice of soaking almonds prior to consumption is popular both commercially and at home. The food safety implications of soaking almonds was investigated through analysis of blogs and videos (n = 85 recipes) to identify both the reasons for soaking almonds and the common practices employed. Among the recipes analyzed, the most common reasons for soaking almonds (94.1%) were perceived benefits such as improved digestion and nutrient uptake. Most recipes (34.1%) suggested soaking at “room temperature” for times that ranged from 4 to 24 h or, more commonly, “overnight” (51.8%). Postsoaking drying instructions were provided in 40 recipes (47.1%). Among those providing a drying temperature (31.8%), 85% specified 66°C and lower. To evaluate the growth of foodborne pathogens during almond soaking, separate cocktails of Escherichia coli O157:H7, Listeria monocytogenes, and Salmonella enterica were inoculated onto raw almonds or into the soak water (almonds-to-water ratios of 1:1 and 1:3 [w/v]). Populations were monitored during soaking at 15, 18, and 23°C for up to 24 h, and during postsoak drying at 66°C for 14 h (for Salmonella only). At 15°C and a 1:1 almond:water ratio, no significant population increase (P > 0.05) was observed between 0 and 24 h for any of the pathogens. At 18°C, increases of 0.63, 1.70, and 0.88 log CFU per sample were observed over 24 h for populations of E. coli O157:H7, L. monocytogenes, and Salmonella, respectively. Populations of E. coli O157:H7, L. monocytogenes, and Salmonella increased by 3.48, 3.22, and 3.94 log CFU per sample, respectively, after 24 h at 23°C. When soaked almonds were dried for 14 h at 66°C, moisture and water activity decreased from 40 to ∼6% and 0.99 to 0.60, respectively, but no significant reduction in Salmonella populations was observed. Recommendations for using shorter times (<8 h) and cooler temperatures (≤15°C) should reduce the potential for foodborne pathogens, if present, to grow during soaking of almonds.

HIGHLIGHTS
  • Online recipes described soaking conditions that would support growth of pathogens.
  • Foodborne pathogens were able to multiply in almonds soaked at 18 and 23°C.
  • Pathogen populations significantly increased after 8 h of soaking at 23°C.
  • Foodborne pathogens did not multiply in almonds soaked at 15°C for 24 h.
  • Drying soaked almonds at 66°C for 14 h did not reduce populations of Salmonella.

RASFF Alerts – Salmonella – Chilled Fuet – Thyme – Chicken Products – Frozen Tenders – Black Pepper

European Food Alerts

RASFF

Salmonella (presence /25g) in chilled fuet from Spain in the Netherlands

RASFF

Salmonella enterica ser. Amberg (presence /25g) and Salmonella enterica ser. Charity (presence /25g) in thyme from Turkey in Lithuania

RASFF

Salmonella enterica ser. Infantis (presence /25g) in chilled chicken wings from Poland in Poland

RASFF

Salmonella enterica ser. Infantis (in 2 out of 5 samples /25g) in frozen chicken drumsticks from Slovakia in Lithuania

RASFF

Salmonella (presence /25g) in frozen chicken products from Poland in France

RASFF

Salmonella enterica ser. Enteritidis (presence /25g) in chilled chicken meat from Poland, with raw material from Hungary in Poland

RASFF

Salmonella enterica ser. Enteritidis (presence /25g) in chilled poultry carcasses from unknown origin in Slovakia

RASFF

Salmonella enterica ser. Infantis (presence /25g) in frozen tenders from Poland in France

RASFF

Salmonella enterica ser. Infantis (in 5 out of 5 samples /25g) in chilled chicken fillets from Poland in Poland

RASFF

Salmonella enterica ser. Infantis (present /25g) and Salmonella enterica ser. Panama (present /25g) in black pepper from Brazil in Germany

USA – Most Listeria Cases Are in Massachusetts in Deli Meat Listeria Outbreak

Food Poisoning Bulletin

Most Listeria cases are in Massachusetts in the deli meat Listeria monocytogenes outbreak announced last week by the Centers for Disease Control and Prevention (CDC). All ten patients have been hospitalized, and one person, who  lived in Florida, has died.

Netherlands – Important safety warning for various ripened goat cheeses Bettinehoeve – Listeria monocytogenes

NVWA

Bettinehoeve is preventively recalling its ripened goat’s cheeses with white mold rind due to a possible listeria contamination.

It concerns the following products:  

Warning
Product name EAN code ce Expiry dates
  • Bettine matured goat cheese 200g
  • 8712023011292
Between 10/28/2020 and 12/30/2020
  • Bettine Blanc matured goat cheese 450g
  • 8712023020089
Between 10/28/2020 and 12/30/2020
  • Bettine Blanc matured goat cheese 1kg
  • 8712023011209
  • 8712023001774
  • 8712023020027
  • 8712023000852
  • 8712023000821
  • 290020CWWWWWC
  • 2885220WWWWWC
Between 10/28/2020 and 12/30/2020
  • Bettine BIO Blanc matured goat cheese 1kg
  • 8712023014156
Between 10/28/2020 and 12/30/2020

Bettinehoeve advises not to consume these cheeses, because they may contain traces of Listeria monocytogenes. This can pose serious health risks, especially in risk groups such as very young children, pregnant, elderly and people with low immunity. 

No contamination has been demonstrated on the end products. A potential source of contamination has only been identified during testing in the environment at the production site. Bettinehoeve has decided to recall all matured goat cheese products (with white mold crust) as a precaution from distributors, retailers and food service partners. 

Contamination is excluded for all other products such as fresh goat’s cheeses and dairy products. These goat dairy products are not contaminated, because these products are produced at a different production location. 

Consumers can call the telephone number +31 (0) 76-502 22 47 

See also: website Bettinehoeve

Download ‘Important safety warning for various ripened goat cheeses Bettinehoeve’

PDF document | 1 page | 127 KB

Warning | 28-10-2020

Different packs of goat cheese

Netherlands – Important Safety Warning PLUS Spanish Fuet Sweet Tomato and PLUS Spanish Fuet BBQ – Salmonella

NVWA

PLUS Supermarkets has decided to immediately recall 2 products from the stores. It’s about:

Warning
Description Barcode Best before
PLUS Spanish fuet sweet tomato PACK 150GR 8710624810764 31-10-20
PLUS Spanish Fuet BBQ PAK 150GR 8710624810757 3-11-20
5-11-20
19-11-20

The products may contain salmonella. Consuming the fuet with these expiration dates can cause food infections and pose a health hazard, especially in young children, the elderly, people with a weakened immune system and pregnant women. Consult your doctor or general practitioner if you have any questions about health problems.

Customers are urged not to eat the products and to return them to a PLUS store.

If you have any questions, please contact PLUS Consumer Service on 0800-222 44 43 (free). They are available on working days from 08:00 to 19:00 and on Saturday from 08:00 to 16:00.

Download ‘Important Safety Warning PLUS Spanish Fuet Sweet Tomato and PLUS Spanish Fuet BBQ’

PDF document | 1 page | 158 KB

Warning | 28-10-2020

Photo of 2 fuet sausages

© PLUS Supermarket

Australia – Sunny Seafood Pty Ltd — Sunny Supreme Frozen Shredded Coconut 200g -Salmonella

PSA

Photograph of Sunny Supreme Frozen Shredded Coconut

Identifying features

Best before date
20 August 2022
Other
APN/EPN 9337724006492

What are the defects?

The recall is due to microbial (Salmonella) contamination.

What are the hazards?

Food products contaminated with Salmonella may cause illness if consumed.

What should consumers do?

Any consumers concerned about their health should seek medical advice and should return the products to the place of purchase for a full refund.

For further information, please contact Sunny Seafood Pty Ltd on 03 9480 6880 or via https://www.sunnyseafood.com.au

Traders who sold this product

Asian grocery stores and Asian supermarkets

Where the product was sold
Victoria
Dates available for sale
  • 8 October 2020 – 27 October 2020

Recall advertisements and supporting documentation

Coordinating agency

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

UK – FSA issues precautionary safety and handling advice for specific eggs – Salmonella

FSA

Precautionary advice to consumers who have purchased a specific batch of British Lion eggs which may be contaminated with salmonella.

The FSA is issuing precautionary advice to consumers who have purchased a specific batch of British Lion eggs which may be contaminated with salmonella.

Affected eggs can be identified by the batch code and the best before date stamped on the eggshell.

The eggs affected are sold in some selected stores listed below in England and Wales only

The eggs affected are in batch 1UK15270. 

Product details

Sainsbury’s (certain stores)

Product Pack size Best before date
Medium Free Range Eggs by Sainsbury’s 6 30 October 2020

05 November 2020

Large Free Range Eggs by Sainsbury’s 6 30 October 2020

05 November 2020

Very Large Free Range Eggs by Sainsbury’s 6 30 October 2020

01 November 2020

05 November 2020

Medium Free Range Eggs by Sainsbury’s 12 01 November 2020

05 November 2020

Large Free Range Eggs by Sainsbury’s 12 30 October 2020

01 November 2020

04 November 2020

05 November 2020

Mixed Size Free Range Eggs by Sainsbury’s 15 30 October 2020
Basics Mixed Size Barn Eggs 15 01 November 2020
J James Mixed Size Free Range Eggs 10 01 November 2020

05 November 2020

Aldi (certain stores)

Product Pack size Best before date
Merevale Medium Free Range Eggs 6 04 November 2020

Asda (certain stores)

Product Pack size Best before date
Asda Large Free Range Eggs 12 30 October 2020

Risk to consumers

A very small number of the above eggs may be contaminated with salmonella, due to it being found in the environment. The eggshell surface might also be contaminated.

Symptoms caused by salmonella usually include fever, diarrhoea and abdominal cramps.

Our advice to consumers

As a precaution, consumers are advised to thoroughly cook the eggs listed in the table above, this means the egg yolks and whites should not be eaten runny. This will eliminate salmonella and avoid risk of illness.

Consumers should always follow good hygiene and egg handling practices when handling eggs and associated packaging, including:

  • storing eggs in the fridge until use
  • using eggs by the best before date
  • cleaning surfaces and kitchen equipment effectively after use, including the fridge
  • washing hands thoroughly after handling of eggs, including packaging and eggshells

Anyone who is concerned about symptoms should contact their GP or out of hours service in the first instance.

Consumers who wish to return the potentially affected eggs should contact the store from where they bought them for further information.

Only the eggs listed above sold at the stores in the table are affected.  No other eggs sold by these retailers or eggs sold at other shops are affected. There is no need to change your shopping habits for eggs or your usual cooking habits for eggs not listed above.

Luxembourg – PLAIN CATALAN FUET, GARLIC, FINE HERBS, ONIONS, WHITE PEPPER, BLACK PEPPER, RED PEPPER AND ROSEMARY FROM THE SOLA BRAND – PRESENCE OF SALMONELLA

SAP

The Luxembourg food safety authorities are recalling the following products:

Last name EAN Health stamp Lot DLC
FUET CATALAN 150 GR 8420941003106 ES 10.12147 / B CE

ES 10.01924 / B CE

All

lots

All the

DLC

FUET CATALAN 150 GR

HERBS

8420941219019
FUET CATALAN 150 GR

BLACK PEPPER

8420941219026
FUET CATALAN 150 GR

RED PEPPER

8420941219033
FUET CATALAN 150 GR

WHITE PEPPER

8420941219040
FUET CATALAN 150 GR

GARLIC

8420941219057
FUET CATALAN 150 GR

ONIONS

8420941219064
FUET CATALAN 150 GR

ROSEMARY

8420941219071

Danger  : Presence of Salmonella

Salmonella can cause symptoms such as nausea, vomiting, abdominal cramps, diarrhea, fever and headache within 6 to 72 hours after consumption. These symptoms may be aggravated in young children, immunocompromised individuals and the elderly. People who have consumed these products and who present these symptoms are advised to consult a doctor, notifying him of this consumption.

Sale in Luxembourg by: Auchan

A sale by other operators cannot be excluded.

Source of information: Auchan recall notification

Communicated by: Government Commission for Quality, Fraud and Food Safety .