USE OF THE GREEN FLUORESCENT PROTEIN TO RAPIDLY ASSESS VIABILITY OF E. COLI IN PRESERVED SOLUTIONS
1996
E. coli strain HB101 was genetically engineered to a fluorescent phenotype by transformation with a plasmid containing complementary DNA for a green fluorescent protein. The level of fluorescence in the transformed strain was directly proportional to the number of viable cells. There was a rapid decrease in fluorescence when transformed cells were inoculated into lamivudine solutions containing ten different preservative formulations. The decrease in fluorescence correlated to a decrease in the number of viable cells, allowing the relative antimicrobial properties of each solution to be compared. This method provides a simple, rapid (
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