Growth and location of bacterial colonies within dairy foods using microscopy techniques: a review

Frontiers in Microbiology
Cian D HickeyMark A E Auty

Abstract

The growth, location, and distribution of bacterial colonies in dairy products are important factors for the ripening and flavor development of cheeses, yogurts, and soured creams. Starter, non-starter, spoilage, and pathogenic bacteria all become entrapped in the developing casein matrix of dairy foods. In order to visualize these bacterial colonies and the environments surrounding them, microscopy techniques are used. The use of various microscopy methods allow for the rapid detection, enumeration, and distribution of starter, non-starter and pathogenic bacteria in dairy foods. Confocal laser scanning microscopy is extensively utilized to identify bacteria location via the use of fluorescent dyes. Further study is needed in relation to the development of micro- gradients and localized ripening parameters in dairy products due to the location of bacteria at the protein-fat interface. Development in the area of bacterial discrimination using microscopy techniques and fluorescent dyes/tags is needed as the benefits of rapidly identifying spoilage/pathogenic bacteria early in product manufacture would be of huge benefit in relation to both safety and financial concerns.

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Citations

Jan 12, 2019·Annual Review of Food Science and Technology·F GomandC Gaiani
Sep 27, 2019·Critical Reviews in Food Science and Nutrition·Jonathan C L ChuaPhil J Bremer
Sep 11, 2020·BioMed Research International·José Domingos FontanaCynara de Melo Rodovalho
Oct 5, 2020·Journal of Dairy Science·Martin G Wilkinson, Gisèle LaPointe
Jun 3, 2021·Foods·Raphael Dos Santos MoraisJennifer Burgain
Jun 1, 2021·Food Research International·Shan LiYuhui Li
Jun 24, 2017·Microbiology Spectrum·Claudio Hidalgo-CantabranaAbelardo Margolles
Aug 5, 2021·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Rafael Torres-GuardadoAlbert Bordons

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Methods Mentioned

BETA
scanning
transmission electron microscopy
electrophoresis
electron based microscopy
super-resolution
Raman microscopy

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