Abstract
MOST workers in microbiological assay will have had experience of the well-established assay procedure that will occasionally give sub-optimal growth in some of the tubes, and hence discordant replicates. In our experience, folic acid assays using Streptococcus faecalis R are particularly prone to troubles of this kind, and such behaviour can be a serious practical difficulty.
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PRICE, S., GARE, L. A Source of Error in Microbiological Assays attributable to a Bacterial Inhibitor in Distilled Water. Nature 183, 838–840 (1959). https://doi.org/10.1038/183838b0
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DOI: https://doi.org/10.1038/183838b0
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