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Promotion of competitive exclusion by ‘good’ bacteria against Salmonella
- Organisation CSIRO
- Full Report
- Publication
- Researchers L.L Duffy, E. Fox
- Categories
Promotion of competitive exclusion by ‘good’ bacteria against Salmonella
The research found that by using a cocktail of isolates there is good potential to develop an application that can exclude numerous Salmonella serovars from attaching to abiotic surfaces that may precede the development of a biofilm.
This project was conducted to improve the biocontrol of Salmonella in egg production through the use of ‘good’ bacteria presenting an alternate approach to Salmonella control.
Control of undesirable bacteria in food production systems typically involves application of chemical sanitisers or an antimicrobial processing control such as heat or pressure treatment.
Bacteria constantly compete for space and nutrients in localised environments. As a result of this competitive pressure, bacteria have developed mechanisms to inhibit other bacterial species and thus give themselves a competitive edge in colonising their environmental niches.
In this project naturally occurring non-pathogenic bacteria from the layer farm environment were isolated and assessed for their ability to inhibit Salmonella growth via agar overlay assays.
The ability of selected candidates to competitively exclude Salmonella was assayed by examining competitive exclusion dynamics on stainless steel via the use of pre-formed biofilms.
Want to see what an egg farm looks like? Take this interactive 360 degree tour to see how eggs are produced in Australia.
