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Application of Multiparametric Flow Cytometry (FCM) to Enumerate the Diagnosis of Pseudomonas aeruginosa and Escherichia coli
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  • Journal title : Environmental Engineering Research
  • Volume 17, Issue 1,  2012, pp.35-39
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2012.17.1.035
 Title & Authors
Application of Multiparametric Flow Cytometry (FCM) to Enumerate the Diagnosis of Pseudomonas aeruginosa and Escherichia coli
Hwang, Myoung-Goo; Oh, Jung-Woo; Katayama, Hiroyuki; Ohgaki, Shinichiro; Cho, Jin-Kyu;
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In this study, multiparametric flow cytometry (FCM) was installed to enumerate the diagnosis of Pseudomonas aeruginosa ATCC 10145 and Escherichia coli K12 (IFO 3301). The nucleic acids (DNA/RNA) were double stained by a LIVE/DEAD bacLight viability kit, involving green SYTO 9 and red propidium iodide (PI), based on the permeability of two chemicals according to the integrity of plasma membrane. As the results showed, the gate for dead bacteria was defined as the range of to photo multiplier tube (PMT) 2 fluorescence (X-axis) and to PMT 4 fluorescence (Y-axis), and the gate for live bacteria was defined as the range of to PMT 2 fluorescence (X-axis) and to PMT 4 fluorescence (Y-axis). In the comparison of the number of the tested bacteria detected by FCM (viability assessment) and plate culture (cultivability assessment), the number of bacteria detected by FCM well represented the number of bacteria that was detected by the colony forming unit (CFU) counting method when bacteria were exposed to isopropyl alcohol and silver/copper cations. Consequently, it is concluded that the application of FCM to monitor the functional effect of disinfectants on the physiological status of target bacteria can offer more rapid and reliable data than the plate culture colony counting method.
Bacterial diagnosis;Escherichia coli;Flow cytometry;Pseudomonas aeruginosa;
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