9 dead, 38 sick from Listeria linked to frozen corn in EU back to 2015

My daughters ate a lot of frozen peas and corn when they were young.

Now I’m being told by Europeans I’m stupid.

As I’ve written before, Chapman and I did a bunch of work with the processing vegetable growers in Ontario (that’s in Canada).

We didn’t do any testing, but all the plants we visited had internal Listeria testing and used test-and-hold procedures. That was over 15 years ago.

Additionally, the blanching process should have removed Listeria (but should be verified).

The UK Food Standards Agency, Food Standards Scotland, Public Health England and Health Protection Scotland – that’s a lot of admin types — are reminding people that most frozen vegetables, including sweetcorn, need to be cooked before eating. This includes if adding them to salads, smoothies or dips.

People should always follow manufacturers’ instructions when preparing their food. If the product is not labelled as “ready to eat”, the cooking instructions should always be followed before eating the food hot or cold. 

In the UK, that means piping hot mush.

Any barfbloggers in the EU wanna take a picture of those clear cooking instructions on frozen corn and send them on?

Last week, the European Food Safety Authority said that frozen corn and possibly other frozen vegetables are the likely source of an outbreak of Listeria monocytogenes that has been affecting Austria, Denmark, Finland, Sweden, and the United Kingdom since 2015.

Experts used whole genome sequencing to identify the food source, which initially was thought to be limited to frozen corn. As of 8 June 2018, 47 cases including nine deaths had been reported.

The same strains of L. monocytogenes have been detected in frozen vegetables produced by the same Hungarian company in 2016, 2017 and 2018. This suggests that the strains have persisted in the processing plant despite the cleaning and disinfection procedures that were carried out.

The available information confirms the contamination at the Hungarian plant. However, further investigations, including thorough sampling and testing, are needed to identify the exact points of environmental contamination at the Hungarian plant. The same recommendation applies to other companies belonging to the same commercial group if environmental contamination is detected.

On 29 June 2018, the Hungarian Food Chain Safety Office banned the marketing of all frozen vegetable and frozen mixed vegetable products produced by the affected plant between August 2016 and June 2018, and ordered their immediate withdrawal and recall. This last measure is likely to significantly reduce the risk of human infections and contain the outbreak. All freezing activity at the plant has been stopped.

New cases could still emerge due to the long incubation period of listeriosis (up to 70 days); the long shelf-life of frozen corn products; and the consumption of frozen corn bought before the recalls and eaten without being cooked properly.

To reduce the risk of infection, consumers should thoroughly cook non ready-to-eat frozen vegetables, even though these products are commonly consumed without cooking (e.g. in salads and smoothies). This applies especially to consumers at highest risk of contracting listeriosis – such as the elderly, pregnant women, new-borns and adults with weakened immune systems.

Frozen fruit and veg: That’s what my 2-decade hockey buddy, who also has four Canadian kids about the same age as mine, said when I asked, how do you go about managing the food for all these kids (along with the pets and horses).

But like Hepatitis A in frozen fruit, I now cook the shit out of them.

6 dead, 32 sick in European Listeria outbreak linked to frozen corn

As listeria continues it death stroll in South Africa, Australia, and before that, Canada, the European Food Safety Authority reports an outbreak of invasive Listeria monocytogenes (L. monocytogenes) infections defined by whole-genome sequencing (WGS) and probably linked to frozen corn has been ongoing in five EU Member States (Austria, Denmark, Finland, Sweden and the United Kingdom) since 2015.

As of 8 March 2018, 32 cases have been reported and six patients have died due to or with the infection. WGS analysis of six non-human L. monocytogenes isolates detected from 2016 to January 2018 in Austria, Finland, France and Sweden found these isolates closely related to the multi-country cluster of L. monocytogenes  serogroup  IVb, multi-locus sequence type 6 (ST6).

The non-human isolates were detected in two different samples from mixed frozen vegetables; three samples from frozen corn, and one sample from a surface where various vegetables could have been processed. The only common food item in all non-human samples was corn. The WGS analysis provides a strong microbiological link between the human and the non-human isolates and is suggestive of a potential contaminated food source related to frozen corn persisting in the food chain at least since 2016.

Traceability information for the three frozen corn samples pointed to frozen corn products packed in Poland and processed/produced in Hungary. Two additional non-human strains isolated in Austria from frozen vegetable mixes with corn as an ingredient were traced back to the same common origin in Hungary. Further investigations are needed to verify the point of contamination in the food chain.

Consumption of frozen corn has been confirmed by two patients, one in Finland and one in Sweden. In addition, a Danish patient reported consumption of mixed frozen vegetables, which could have included corn. The Finnish patient confirmed consumption of frozen corn of one suspected brand, supporting an epidemiological link between the outbreak cases and frozen corn. However, no traceability and microbiological information was available for the corn consumed by the Finnish and the Swedish patients.

Food business operators in Estonia, Finland, Poland and Sweden have withdrawn and recalled the implicated frozen corn products from the market. These measures are likely to significantly reduce the risk of human infections in these countries. However, new invasive listeriosis cases may be identified due to the long incubation period (1–70 days), long shelf-lives of frozen corn products and potential consumption of frozen corn bought by the customers before the recalls and eaten without being properly cooked. Furthermore, until the root source of contamination is established and control measures implemented, new cases may occur.

So where does frozen corn – one of my personal favorites – come from?

In 2001, long before barfblog.com or youtube, Chapman and I toured some farms and vegetable processing plants in Ontario (that’s in Canada) in 2001.

We more both amazed at the efforts involved in taking corn from the field to a frozen packaged state.

At the time we were wandering around combines in fields – something comfortable for me – and a dude said, we’re gonna sell 90-minute, non-GMO frozen corn in the EU./em>

That’s 90 minutes from harvest to the frozen bag.

I won’t go into the BS marketing aspects of this, but that they were able to pull it off was something to watch.

Intricate timing with the harvest, metal detectors, individually quick frozen (IQF) kernels and into a box to be bagger later.

I asked what the biggest microbial risks were, and the manager said, Listeria.

So they ran a test-and-hold procedure.

That’s how it’s done.

No idea what’s happening with the EU suppliers.