Abstract
Cyclic voltam mo grams of wild and antibiotic resistant cells were obtained by an electrode system with a basal plane pyrolytic graphite and a membrane filter to trap bacteria after the cells were incubated at 37°C for 1 h in the medium containing 50 μg/ml ampicillin or 20 μg/ml tetracycline. Wild and ampicillin or tetracycline resistant strains of E. coli were classified from the peak potential and shape of the cyclic voltammograms, when the potential of the graphite electrode was swept in the range from 0 to 1. 0 V versus saturated calomel electrode (SCE). The peak current of wild strains decreased with increasing antibiotic concentration. On the other hand, the peak current of antibiotic resistant strains slightly decreased for ampicillin and almost constant for tetracycline. The peak current increased with increasing initial cell numbers. Consequently it was shown that cell number and minimal inhibitory concentration were estimated from the peak current of the cyclic voltammograms. Electrochemical reaction of CoA in the cell contributed to the classification of the wild and antibiotic resistant strains of E. coli. The minimal inhibitory concentrations obtained by the electrode system were almost in good agreement with those obtained by the conventional method.
| Original language | English |
|---|---|
| Pages (from-to) | 518-523 |
| Number of pages | 6 |
| Journal | Nippon Kagaku Kaishi |
| Volume | 1987 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1987 |
| Externally published | Yes |
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Classification of Wild and Antibiotic Resistant Bacteria with Electrode. / Matsunaga, Tadashi; Shigematsu, Akinori.
In: Nippon Kagaku Kaishi, Vol. 1987, No. 3, 1987, p. 518-523.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Classification of Wild and Antibiotic Resistant Bacteria with Electrode
AU - Matsunaga, Tadashi
AU - Shigematsu, Akinori
PY - 1987
Y1 - 1987
N2 - Cyclic voltam mo grams of wild and antibiotic resistant cells were obtained by an electrode system with a basal plane pyrolytic graphite and a membrane filter to trap bacteria after the cells were incubated at 37°C for 1 h in the medium containing 50 μg/ml ampicillin or 20 μg/ml tetracycline. Wild and ampicillin or tetracycline resistant strains of E. coli were classified from the peak potential and shape of the cyclic voltammograms, when the potential of the graphite electrode was swept in the range from 0 to 1. 0 V versus saturated calomel electrode (SCE). The peak current of wild strains decreased with increasing antibiotic concentration. On the other hand, the peak current of antibiotic resistant strains slightly decreased for ampicillin and almost constant for tetracycline. The peak current increased with increasing initial cell numbers. Consequently it was shown that cell number and minimal inhibitory concentration were estimated from the peak current of the cyclic voltammograms. Electrochemical reaction of CoA in the cell contributed to the classification of the wild and antibiotic resistant strains of E. coli. The minimal inhibitory concentrations obtained by the electrode system were almost in good agreement with those obtained by the conventional method.
AB - Cyclic voltam mo grams of wild and antibiotic resistant cells were obtained by an electrode system with a basal plane pyrolytic graphite and a membrane filter to trap bacteria after the cells were incubated at 37°C for 1 h in the medium containing 50 μg/ml ampicillin or 20 μg/ml tetracycline. Wild and ampicillin or tetracycline resistant strains of E. coli were classified from the peak potential and shape of the cyclic voltammograms, when the potential of the graphite electrode was swept in the range from 0 to 1. 0 V versus saturated calomel electrode (SCE). The peak current of wild strains decreased with increasing antibiotic concentration. On the other hand, the peak current of antibiotic resistant strains slightly decreased for ampicillin and almost constant for tetracycline. The peak current increased with increasing initial cell numbers. Consequently it was shown that cell number and minimal inhibitory concentration were estimated from the peak current of the cyclic voltammograms. Electrochemical reaction of CoA in the cell contributed to the classification of the wild and antibiotic resistant strains of E. coli. The minimal inhibitory concentrations obtained by the electrode system were almost in good agreement with those obtained by the conventional method.
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U2 - 10.1246/nikkashi.1987.518
DO - 10.1246/nikkashi.1987.518
M3 - Article
VL - 1987
SP - 518
EP - 523
JO - Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal
JF - Nippon Kagaku Kaishi / Chemical Society of Japan - Chemistry and Industrial Chemistry Journal
SN - 0369-4577
IS - 3
ER -