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  • Title: Development of a fluorescence in situ hybridization method for cheese using a 16S rRNA probe.
    Author: Ercolini D, Hill PJ, Dodd CE.
    Journal: J Microbiol Methods; 2003 Feb; 52(2):267-71. PubMed ID: 12459248.
    Abstract:
    A 16S rRNA fluorescence in situ hybridization (FISH) method for cheese was developed to allow detection in situ of microorganisms within the dairy matrix. An embedding procedure using a plastic resin was applied to Stilton cheese, providing intact embedded cheese sections withstanding the hybridization reaction. The use of a fluorescein-labelled 16S rRNA Domain Bacteria probe allowed observation of large colonies of microbial cells homogeneously distributed in the cheese matrix. FISH experiments performed on cheese suspensions provided images of the different microbial morphotypes occurring. The technique has great potential to study the spatial distribution of microbial populations in situ in foods, especially where the matrix is too fragile to allow manipulation of cryosections.
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