Abstract
A new sensor method based on a multi-channel series piezoelectric quartz crystal (MSPQC) was proposed for studying the effect of gentamicin and cefotaxime combination against Escherichia coli ATCC 25922. The frequency curves under different combination regimens were obtained and compared with each other. When antibiotic had an inhibitory effect to the growth of bacteria, frequency detection time (FDT) would be prolonged. The FDT was used to assess the effect of an antibiotic combination. By using the proposed method, simultaneous administration, different order, and time interval of nonsimultaneous administration were investigated in detail. The MSPQC method can provide the process information in real time. It is simple, rapid, and easy to perform.
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