Comparison between cage and free-range egg production on microbial composition, diversity and the presence of Salmonella enterica

Article


Wilson, Annaleise, Chandry, P. Scott, Turner, Mark S., Courtice Jodi M. and Fegan, Narelle. 2021. "Comparison between cage and free-range egg production on microbial composition, diversity and the presence of Salmonella enterica ." Food Microbiology. 97. https://doi.org/10.1016/j.fm.2021.103754
Article Title

Comparison between cage and free-range egg production on microbial composition, diversity and the presence of Salmonella enterica

ERA Journal ID2473
Article CategoryArticle
AuthorsWilson, Annaleise, Chandry, P. Scott, Turner, Mark S., Courtice Jodi M. and Fegan, Narelle
Journal TitleFood Microbiology
Journal Citation97
Article Number103754
Number of Pages9
Year2021
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0740-0020
1095-9998
Digital Object Identifier (DOI)https://doi.org/10.1016/j.fm.2021.103754
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0740002021000198
Abstract

The microbial composition of the food production environment plays an important role in food safety and quality. This study employed both 16 S rRNA gene sequencing technology and culture-based techniques to investigate the bacterial microbiota of an egg production facility comprising of both free-range and conventional cage housing systems. The study also aimed to detect the presence of Salmonella enterica and determine whether its presence was positively or negatively associated with other taxa. Our findings revealed that microbiota profiles of free-range and cage houses differ considerably in relation to the relative abundance and diversity with a number of taxa unique to each system and to individual sampling sites within sheds. Core to each housing system were known inhabitants of the poultry gastrointestinal tracts, Romboutsia and Turicibacter, as well as common spoilage bacteria. Generally, free-range samples contained fewer taxa and were dominated by Staphylococcus equorum, differentiating them from the cage samples. Salmonella enterica was significantly associated with the presence of a taxa belonging to the Carnobacteriaceae family. The results of this study demonstrate that the diversity and composition of the microbiota is highly variable across egg layer housing systems, which could have implications for productivity, food safety and spoilage.

KeywordsBacterial microbiota; Culture-independent; Eggs; Farm environmental bacteria; Food safety; Salmonella enterica
PubMed ID33653527
FunderCommonwealth Scientific and Industrial Research Organisation
Byline AffiliationsUniversity of Queensland
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
School of Mathematics, Physics and Computing
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