Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Beware of Washing Away the Pathogens and Sending Them to the Food

13.08.2009
Research at Kansas State University's Food safety Consortium shows that without proper precautions, washing the floor drains in food processing plants could actually make it easier for any Listeria monocytogenes to travel from the drain to points on the processing line.

When it’s time to wash down the facilities in food processing plants to clear out any pathogenic bacteria, industry needs to watch for one unintended consequence. Washing the floor drains could actually make it easier for any Listeria monocytogenes to travel from the drain to points on the processing line.

Food Safety Consortium researchers at Kansas State University already knew that the open floor drains in processing environments can harbor the bacteria, which is why those drains are the targets of high pressure washing and cleaning. They found out a new angle: that the aerosols generated by the washing can transfer the bacterial cells away from the drain as intended but onto surfaces where food is being processed a few feet above the floor.

The situation can be remedied, but workers need to be trained how to do so, said Jasdeep Saini, a KSU doctoral student in food science who researched the issue with food science professors James Marsden and Daniel Fung. The workers would then modify their cleaning procedures.

“If the worker who is actually doing that knows that this is the point from where the translocation of bacteria is actually occurring and is told to be careful, some change in that respect can be made,” Saini said.

The research team ran tests to find out the potential for translocating L. monocytogenes from drains to food contact surfaces. The researchers placed stainless steel markers at heights of 1, 3 and 5 feet above the drain level. They checked the markers after using a high-pressure hose to wash the drain and took samples after eight hours and again after 48 hours.

The numbers for both the eight-hour and 48-hour tests showed that bacterial cells from the drain were found at all three height levels, the highest number at the 1-foot level closest to the drain. More bacterial cells were present on the contact surfaces after 48 hours than after eight hours, likely because of the longer time available for the cells to proliferate and form a biofilm – thin, resistant layers of microorganisms – as protection against environmental stress.

“Listeria has been known to form bioflilms,” Saini said. “Biofilms develop between 36 and 48 hours. If there are biofilms existing in the drain, how those are actually translocated can cause contamination on the line.”

Dave Edmark | Newswise Science News
Further information:
http://www.uark.edu
http://www.ksu.edu

More articles from Health and Medicine:

nachricht Study tracks inner workings of the brain with new biosensor
16.08.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Foods of the future
15.08.2018 | Georg-August-Universität Göttingen

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

Staying in Shape

16.08.2018 | Life Sciences

Diving robots find Antarctic seas exhale surprising amounts of carbon dioxide in winter

16.08.2018 | Earth Sciences

Protein droplets keep neurons at the ready and immune system in balance

16.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>