MUG negative Escherichia coli are a small fraction (2.5%) of the total E. coli in Kentucky groundwater samples. It is unlikely that they alone will cause a significant potential to underestimate fecal contamination using MUG as the primary criterion for that assessment. An unresolved question is how effectively MUG-based, defined-substrate tests address false negative water samples containing MUG positive E. coli.
Digital Object Identifier (DOI)
Coyne, Mark S. and Shuler, J. C., "Frequency of MUG Negative Escherichia coli in Kentucky Groundwater Samples" (1994). Plant and Soil Sciences Faculty Publications. 18.