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Simplified Henry technique for initial recognition of Listeria colonies.

By R V Lachica


The Henry oblique transmitted-light viewing technique was modified to provide a more precise, convenient, and familiar manner with which to read (score) and recognize colonies of listeriae by their distinct bluish cast. The simplified technique involved illuminating each colony directly with a high-intensity lamp while viewing it with a hand lens at a precise angle in place of a scanning light microscope

Topics: Research Article
Year: 1990
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Provided by: PubMed Central
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