alexa Biofilm formation by Campylobacter jejuni in controlled mixed-microbial populations.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Teh KH, Flint S, French N

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Abstract This study was to screen the ability of biofilm formation by Campylobacter jejuni strains found in New Zealand, and investigate the biofilm growth of C. jejuni in a controlled mixed-microbial population that includes five different bacteria. The ability of C. jejuni to form a biofilm in monoculture and mixed-microbial populations was measured in a laboratory assay using a microtiter plate screening assay. The optical density of the biofilm and cell growth from mixed-microbial populations was converted to a Biofilm Formation Index (BFI). This index was used to standardize the biofilm formation in the mixed-microbial populations. High BFI was observed for Enterococcus faecalis (2.30) and Staphylococcus simulans (3.75) when they were grown with C. jejuni multilocus sequence type ST-474: a dominant poultry and human-associated type in New Zealand. C. jejuni cells were recovered from most of the biofilms containing E. faecalis and/or S. simulans. These results suggest that E. faecalis and S. simulans may play a role in biofilm formation in the poultry environment as both of these microorganisms are found in poultry processing environments and were able to form a biofilm in association with C. jejuni under microaerobic conditions. Understanding the relationships among C. jejuni, E. faecalis and S. simulans in poultry processing plants and farms may help in the design of strategies to reduce the reservoir of contamination of these bacteria and reduce the incidence of campylobacteriosis. Copyright © 2010 Elsevier B.V. All rights reserved. This article was published in Int J Food Microbiol and referenced in Journal of Microbial & Biochemical Technology

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