Tag: Biofilms

Nanotechnology helps prevent biofilms

Nanotechnology helps prevent biofilms

| January 21, 2015

A new study by scientists at Cornell University and the Rensselaer Polytechnic Institute in the USA has developed a process that creates nanoscale pores on a metal surface and can help to prevent bacterial attachment and biofilm formation. The researchers used an electrochemical anodisation process to produce cylindrical nanopores between 15 and 100 nm in […]

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Zero tolerance to Listeria – pipe dream or real possibility?

Zero tolerance to Listeria – pipe dream or real possibility?

| January 23, 2014 | 1 Comment

In the EU, the rules state that Listeria monocytogenes cannot be present in a ready-to-eat product at levels above 100 cfu/g at the end of shelf life, whereas in the US a ‘zero-tolerance’ policy does not permit any amount of Listeria to be present in ready-to-eat foods at any point. There has been much inconclusive debate over which approach is the more effective, but what can be said is that the regulatory differences do influence how manufacturers meet the challenge of Listeria.

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Salmonella in biofilms proves highly resistant to disinfectants

Salmonella in biofilms proves highly resistant to disinfectants

| January 16, 2014

A team of researchers from the National University of Ireland in Galway has been investigating the effect of commonly used sanitising chemicals on Salmonella bacteria contained in biofilms on surfaces. The researchers used a biofilm reactor to grow Salmonella biofilms and then tested the efficacy of three disinfectants, sodium hypochlorite, sodium hydroxide and benzalkonium chloride, […]

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Low-level biocide exposure increases antibiotic resistance

Low-level biocide exposure increases antibiotic resistance

| January 8, 2014

Researchers at the University of Leon in Spain have discovered that sub-lethal doses of some biocides in common use in the food industry could both enhance the ability of bacteria to form biofilms and increase their resistance to certain antibiotics. The team investigated the effect of increasing sub-inhibitory concentrations of trisodium phosphate, sodium nitrite and […]

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Adaptations allow E. coli to live on plants

| November 9, 2012

A recently published research report from a team at the UK Institute of Food Research reveals that populations of E. coli isolated from plants are subtly different from those found in the guts of animals. The findings suggest ways that the bacteria have adapted to different environments. The researchers compared more than 100 isolates taken […]

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BIOFILMS ADD NEW DIMENSIONS TO FOOD MICROBIOLOGY

BIOFILMS ADD NEW DIMENSIONS TO FOOD MICROBIOLOGY

| June 24, 2008

If you are a food scientist or food technologist you are probably familiar with the term ‘biofilm’. You are probably aware that a biofilm consists of a layer of microorganisms embedded in a kind of microbial slime that forms on wet surfaces in food processing areas and makes them more difficult to clean properly. You […]

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