Category Archives: Research

USA – New Course from ChildCare Education Institute on Preventing Foodborne Illnesses

Global News Wire

ATLANTA, GA, March 25, 2021 (GLOBE NEWSWIRE) — ChildCare Education Institute® (CCEI), an online child care training provider dedicated exclusively to the early care and education workforce, is proud to introduce NFS102: Preventing Foodborne Illnesses to the online child care training course catalog.

Foodservice managers and others tasked with preparing meals for children enjoy creating delicious and nutritious options for the children in their care. Those who prepare food in the early childhood environment are eager to prepare tasty, nutritious meals because they know how important good nutrition is for young bodies and minds.

Foodborne illnesses are infectious or toxic diseases caused by bacteria or other agents that enter the body through contaminated food.  Every person is at risk of contracting a foodborne illness. Foodborne illnesses are prevented by combining good hygiene and sanitation, safe storage, and proper preparation and handling.

New Zealand – New Zealand Food Safety warns consumers not to eat raw mussels

MPI

New Zealand Food Safety is advising people to stay safe from food poisoning by cooking mussels thoroughly before eating them.

Dr Paul Dansted, director of food regulation at New Zealand Food Safety, says Vibrio parahaemolyticus are naturally occurring bacteria that are found in seawater and occur when warmer temperatures during summer are favourable for growth.

“We expect to see an increase in incidence of Vibrio parahaemolyticus in the warmer months. However, statistics from the Institute of Environmental Science and Research (ESR) show a recent spike in cases, with 22 since the beginning of the year. This compares with 14 for the first 3 months of 2020, and 4 for the same period in 2019.

“Symptoms of Vibrio parahaemolyticus may include watery or bloody diarrhoea, abdominal cramps, nausea, vomiting, fever, and/or headache. The consequences can be more serious for people with weakened immunity, the young, the elderly and frail, and pregnant women.

“As undercooked mussels can be a risk factor, it’s important to take care with their preparation. To be safe to eat, thoroughly cook mussels at above 65oC for one minute. This will ensure that any Vibrio parahaemolyticus present in the mussels will be destroyed.

“One good way to know when mussels are fully cooked is that their shells pop open when boiled or steamed, and the mussel inside is firm to the touch.

“If you get sick, phone Healthline for advice on 0800 61 11 16 or seek medical attention immediately. If possible, store and refrigerate any leftover food for testing.”

Take care when handling, preparing and consuming mussels. Follow this simple food safety guidance to avoid getting Vibrio parahaemolyticus: Clean, Cook, Chill.

“It is raw mussels that we are advising against consuming. They are not the mussels that can be bought in plastic pottles. Those mussels are cooked and marinated and are not affected,” Dr Dansted says.

Find out more

EU – Stable Campylobacter and Salmonella cases in the EU

Oulah

The number of reported cases of illnesses caused by Campylobacter  and  Salmonella bacteria   in humans in Europe appear to level off over the past five years, according to the  latest zoonoses report released by the European Food Safety Authority (EFSA) and the European Center for Disease Prevention and Control (ECDC).

Campylobacteriosis, the most frequently reported gastrointestinal disease in the EU since 2005, affected more than 220,000 people in 2019. Salmonellosis was the second most frequently reported zoonosis in the EU, with around 88,000 people affected.

Of the 66,113 ready-to-eat food samples – foods that did not require cooking before consumption – 0.3% tested positive for  Salmonella . Of the 191,181 non-ready-to-eat food samples, 1.5% tested positive. 18 of the 26 Member States reporting on programs to control  Salmonella  in poultry populations met all their reduction targets, up from 14 in 2018.

The next most frequently reported diseases are   shiga-toxin-producing Escherichia coli (STEC), yersiniosis and listeriosis. The trend in confirmed human cases of listeriosis remained stable between 2015 and 2019, after a long period of increase. 2,621 cases were reported in 2019, mostly affecting individuals over the age of 64. It is the most serious disease, with high rates of hospitalization (92%) and mortality (17.6%).

The report also looks at the cause of outbreaks of foodborne illness in the EU, i.e. outbreaks in which two or more people contract the same disease after consuming the same contaminated food. Salmonella  remains the most frequently detected agent and causes 926 outbreaks; the number of outbreaks due to  S . Enteritidis  , on the other hand, has declined. The most common sources of outbreaks of salmonellosis were eggs and egg products. Noroviruses in fish and fishery products cause the greatest number of outbreaks (145) with “strong evidence” involving a food source.

A total of 5,175 outbreaks of foodborne illness were reported in 2019, a decrease of 12.3% from 2018.

The report also contains data on  Mycobacterium bovis / caprae ,  Brucella ,  Yersinia ,  Trichinella ,  Echinococcus ,  Toxoplasma  gondii , rabies, Q fever, West Nile virus and tularemia.


▸ Source
https://www.efsa.europa.eu/

UK – The FSA reveals that 50% of adults do not always check the use-by date on their food putting themselves and family at risk

FSA

The Food Standards Agency (FSA) new snapshot poll of 2,132 adults aged 16-75 in England, Wales, and Northern Ireland reveals half of adults do not always check the use-by date on their food before eating it.

Findings show that 44% view use-by dates as a ‘useful guide’ – not realising the potential health risks of getting food poisoning, which could make them or their family seriously ill.

According to the poll, 50% of adults in England, Wales and Northern Ireland, cannot identify the correct definition for a use-by date: that is, that food can be eaten until the use-by date, but not safely after. This is in contrast to the best before date, which is about quality, and food eaten past this date might not taste as good.

The research also showed that 76% of these adults have knowingly eaten food past the use-by date, with 37% admitting to cooking food for other people that is past its use-by date – which rises to 43% people aged 25-34 years old.

The poll revealed 77% of people decide whether food is safe to eat by smelling it, which rises to 80% of women compared to 73% of men.

Professor Robin May, Chief Scientific Advisor at the FSA said:

“These findings are worrying. They indicate that people are often confused about food dates, potentially putting themselves and others at risk of illness. A use-by date on food is there for a reason. It is about safety. After the use-by date you cannot cook, freeze or eat the food safely, even if it smells or looks ok. It’s really not possible to tell whether food is safe to eat by smelling or tasting it. We would like everyone to take the use-by dates on their food seriously.”

Dr Dawn Harper, spokesperson for the campaign commented:

“It’s so important to understand that best before and use-by dates are not the same. If you eat food past the use-by date it could make you or your family seriously ill. I’ve treated a number of patients for food poisoning over the years, and it can be particularly nasty to those more vulnerable to infection such as young children and elderly people. Make sure you’re looking after yourself and always checking the use-by date to keep you and your family safe and healthy.”

According to the poll, of those adults who sometimes eat food past the use-by date, 43% do so believing that if food is just past the use-by date, it’s safe to eat. Over half (51%) continue to eat food past the use-by date because they’ve done it before and felt fine and 59% say they eat food past the use-by date because they don’t want it to go to waste.

Professor Robin May continues:

“It’s great that people are trying to minimise food waste, but there are lots of ways to do that without gambling with your health, such as planning your meals ahead of time, checking what you have in the fridge that’s close to its use-by date and freezing food right up until the use-by date.”

Findings also show that 39% of 16-24 year olds reported they were more likely to pay attention to the use-by date during the lockdown in February 2021, compared to before the pandemic (March 2020). 55-75s are the group least likely to change their behaviour when it comes to checking use-by dates, with 90% reporting no change in behaviour.

You can find more advice on use-by dates on our Best before and use-by dates page.

About this poll

The Research poll completed by Ipsos Mori based on 2,132 respondents across all adults aged 16-75 in England, Wales and Northern Ireland. Ipsos MORI interviewed a representative sample of 2,132 adults in England, Wales and Northern Ireland aged 16-75 online between 5 and 8 March 2021. Data are weighted to the profile of the population. All polls are subject to a wide range of potential sources of error.

Last week we published the Food in a Pandemic report which explored people’s experiences of food during COVID-19, and the findings from our Food and You 2 survey which provides  more detailed information on the public’s self-reported knowledge, attitudes, and behaviour regarding food safety, including use-by dates.

Research – UK – 2018 Shigella Outbreak – Coriander

Cambridge Org

In April 2018, Public Health England was notified of cases of Shigella sonnei who had eaten food from three different catering outlets in England. The outbreaks were initially investigated as separate events, but whole-genome sequencing (WGS) showed they were caused by the same strain. The investigation included analyses of epidemiological data, the food chain and microbiological examination of food samples. WGS was used to determine the phylogenetic relatedness and antimicrobial resistance profile of the outbreak strain. Ultimately, 33 cases were linked to this outbreak; the majority had eaten food from seven outlets specialising in Indian or Middle Eastern cuisine. Five outlets were linked to two or more cases, all of which used fresh coriander although a shared supplier was not identified. An investigation at one of the venues recorded that 86% of cases reported eating dishes with coriander as an ingredient or garnish. Four cases were admitted to hospital and one had evidence of treatment failure with ciprofloxacin. Phylogenetic analysis showed that the outbreak strain was part of a wider multidrug-resistant clade associated with travel to Pakistan. Poor hygiene practices during cultivation, distribution or preparation of fresh produce are likely contributing factors.

Research – Quality changes and shelf life prediction of cooked cured ham stored at different temperatures

Journal of Food Protection

Cooked cured ham is a ready-to-eat food that is popular among consumers. Stored temperature has a key effect on the quality and shelf life of ham. In this work, the quality changes and shelf life prediction of cooked cured ham stored at different temperatures were investigated. Sensory evaluation, physical and chemical indicators, and aerobic plate count were determined. Results showed that high storage temperature of cooked ham accelerates quality deterioration. Partial least squares (PLS) regression analysis based on the variable importance for projection (VIP) identified nine important variables for predicting the shelf life of cooked cured ham. Compared with either PLS or back-propagation artificial neural network (BP-ANN), the hybrid PLS–BP-ANN model better predicts the shelf life of cooked cured ham using the nine important variables. This study provides a theoretical basis and data support for the quality control of cooked cured ham and a new idea for research on the shelf life prediction of cooked cured ham.

Research – Ozone Treatments for Preserving Fresh Vegetables Quality: A Critical Review

MDPI

Ozone is recognized as an antimicrobial agent for vegetables storage, washing, and processing. This strong disinfectant is now being used in the food industry. In this review, the chemical and physical properties of ozone, its generation, and factors affecting ozone processing efficiency were explained as well as recent regulatory developments in the food industry. By then selecting three vegetables, we show that ozone avoids and controls biological growth on vegetables, keeping their attractive appearance and sensorial qualities, assuring nutritional characteristics’ retention and maintaining and increasing the shelf-life. In liquid solution, ozone can be used to disinfect processing water and vegetables, and in gaseous form, ozone helps to sanitize and preserve vegetables during storage. The multifunctionality of ozone makes it a promising food processing agent. However, if ozone is improperly used, it causes some deleterious effects on products, such as losses in their sensory quality. For an effective and a safe use of ozone, specific treatment conditions should be determined for all kinds of vegetables. In a last step, we propose highlighting the different essential characteristics of ozone treatment in order to internationally harmonize the data relating to the treatments carried-out.

Research – Rapid Testing and Interventions to Control Legionella Proliferation following a Legionnaires’ Disease Outbreak Associated with Cooling Towers

MDPI

Legionella_Plate_01

Most literature to date on the use of rapid Legionella tests have compared different sampling and analytical techniques, with few studies on real-world experiences using such methods. Rapid tests offer a significantly shorter feedback loop on the effectiveness of the controls. This study involved a complex of five factories, three of which had a history of Legionella contamination in their cooling water distribution system. Multiple sampling locations were utilised to take monthly water samples over 39 months to analyse for Legionella by both culture and quantitative polymerase chain reaction (qPCR). Routine monitoring gave no positive Legionella results by culture (n = 330); however, samples were frequently (68%) positive by qPCR for Legionella spp. (n = 1564). Legionella spp. qPCR assay was thus found to be a good indicator of cooling tower system health and suitable as a routine monitoring tool. An in-house qPCR limit of 5000 genomic units (GU)/L Legionella spp. was established to trigger investigation and remedial action. This approach facilitated swift remedial action to prevent Legionella proliferation to levels that may represent a public health risk. Cooling tower operators may have to set their own action levels for their own systems; however, in this study, 5000 GU/L was deemed appropriate and pragmatic. View Full-Text

Research – Microbiological contamination of ready to eat algae and evaluation of Bacillus cereus behavior by microbiological challenge test

Journal of Food Protection

Consumption of seaweeds, often categorized as a superfood, is becoming popular in western countries. Algae can be marketed fresh, but are usually sold dehydrated to ensure longer shelf life. The consumption, often as ready to eat, open up possible risks for public health because of foodborne pathogens that can contaminate the raw material during harvesting or manipulation. In this study, fourteen ready to eat foods based on dehydrated algae, representative of the most consumed species, were considered. The microbial content, with a focus on Listeria monocytogenes and Bacillus cereus, was investigated by plate counts and B. cereus strains were isolated and identified by 16s rRNA gene sequencing. The microbiological quality was heterogeneous among the samples and, in particular, marine bacteria, Listeria spp., B. cereus and coliforms were detected. To contribute to related risk assessment, the ability of B. cereus to grow during refrigerated storage was evaluated, to our knowledge for the first time, by a microbiological challenge test on two ready to eat foods based on Undaria pinnatifida and Palmaria palmata.  Despite this study demonstrating the inability of B. cereus to proliferate in seaweed-based food, its presence in dehydrated foodstuffs cannot rule out the replication after rehydration before consumption, making it necessary to shed light on the possible risks for consumers.

Research – Biofilm-forming ability of poultry Campylobacter jejuni strains in the presence and absence of Pseudomonas aeruginosa

Canadian Journal of Microbiology

The aims of this study were to evaluate the ability of Campylobacter jejuni isolated from a poultry slaughterhouse to form biofilm in the presence and absence of Pseudomonas aeruginosa, and the effect of surface (stainless steel, polystyrene), temperature (7, 25, and 42 °C), and oxygen concentration (microaerophilic and aerobic conditions) on the formation of biofilm. The genes ahpCcadFclpPdnaJdocAflaAflaBkatAkpsMluxSracR, and sodB, related to biofilm formation by C. jejuni, were also investigated. All isolates formed biofilm on stainless steel and on polystyrene, in both aerobic and microaerophilic atmospheres, including temperatures not optimal for C. jejuni growth (7 and 25 °C), and biofilm also was formed in the presence of P. aeruginosa. In dual-species biofilm on stainless steel, biofilm formation was 2–6 log CFU·cm−2 higher at 7 °C for all isolates, in comparison with monospecies biofilm. Ten genes (ahpCcadFclpPdnaJdocAflaAflaBluxSracR, and sodB) were detected in all isolates, but katA and kpsM were found in four and six isolates, respectively. The results obtained are of concern because the poultry C. jejuni isolates form biofilm in different conditions, which is enhanced in the presence of other biofilm formers, such as P. aeruginosa.