Infections caused by Listeria monocytogenes are increasing in vulnerable groups
Apr 18, 2018 - Microbiology
Infections caused by Listeria monocytogenes are increasing in vulnerable groups
In two demographic groups in the EU, there has been an increase in infections caused by Listeria monocytogenes in recent years: people over 75 years of age and women aged 25 to 44 years (presumably mostly in connection with pregnancy). This is one of the most important findings of a scientific EFSA opinion on Listeria monocytogenes and the public health risks associated with the consumption of contaminated ready-to-eat food.
EFSA experts concluded that the higher incidence of listeriosis in older people is likely due to the increased prevalence of underlying conditions such as cancer and diabetes.
Most people become infected through ready-to-eat foods like smoked and gravad fish, heat-treated meat, as well as soft and semi-soft cheese. However, other foods - such as ready-prepared salads (more information here) - can also lead to infections.
The experts estimated that one-third of listeriosis cases are due to the growth of Listeria monocytogenes in foods prepared or stored in refrigerators at home. This underscores the importance of adhering to basic hygiene rules, such as maintaining recommended storage temperatures and times. International organizations like the World Health Organization recommend refrigerating food below 5°C.
In our laboratory, testing for Listeria monocytogenes is one of our core services. In 2017 alone, we conducted over 30,000 such tests using three accredited methods:
- Classical ISO methods (ISO 11290-1 and ISO 11290-2)
- Rapid methods in 48 hours (qualitative and quantitative)
- Rapid method with RT-PCR in 24 hours (qualitative)
More information about Listeria monocytogenes can be found in our FAQs:
- Why is Listeria monocytogenes so dangerous?
- What are the specific characteristics of Listeria monocytogenes?
- In which foods is Listeria monocytogenes found?
- Fact sheet "Listeria monocytogenes"
Additionally, you can find more interesting information at:
- www.rki.de: under "Infectious Diseases A-Z"
- www.bfr.bund.de: under "Food Safety"
- www.lgl.bayern.de: under "Food" and then "Hygiene"
Our customer advisors are happy to assist with any questions.