"Factories handling raw and processed meat products can become plagued by persistent harmful Listeria monocytogenes bacteria stuck to their work surfaces and machinery from where they can enter food products and potentially cause food poisoning," according to Professor Christine Dodd from the University of Nottingham, UK.
"We have examined which factors affect attachment and have shown that the presence of a common food spoilage bacteria called Pseudomonas fluorescens may affect the ability of Listeria monocytogenes to stick to surfaces" said Professor Dodd.
The team of Nottingham scientists found that Listeria was not as successful. at attaching to stainless steel surfaces when in competition with other bacteria. However, when Pseudomonas fluorescens was allowed to attach to the surface first, Listeria was able to attach to the same surface much more effectively.
According to the scientists, bacteria which form communities on surfaces,, known as biofilms are much more highly resistant to cleaning products and even antibiotics, Listeria's success in persisting in factories comes partly from this ability to form resistant biofilms, and partly from its extraordinary tolerance to drying out, thereby allowing it to survive on what should be clean surfaces.
"We also looked at the influence of different cooked meat juices including beef, pork, lamb, chicken and duck," said Professor Dodd. "We found significant differences between the ability of Listeria to stick to stainless steel surfaces at different temperatures, depending upon which meat was used. Cooked duck juices at 25oC allowed the highest levels of Listeria attachment." The different meat residues may affect the ability of Listeria monocytogenes to attach by causing changes in the surface of the bacterial cells.
This means that meat factories may need to modify their cleaning and disinfecting procedures according to the type of meat product being processed, if food poisoning outbreaks are to be avoided.
Lucy Goodchild | alfa
Cells communicate in a dynamic code
19.02.2018 | California Institute of Technology
Studying mitosis' structure to understand the inside of cancer cells
19.02.2018 | Biophysical Society
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
19.02.2018 | Materials Sciences
19.02.2018 | Materials Sciences
19.02.2018 | Life Sciences