PMID- 33291693 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201226 IS - 2072-666X (Print) IS - 2072-666X (Electronic) IS - 2072-666X (Linking) VI - 11 IP - 12 DP - 2020 Dec 4 TI - Portable Device for Quick Detection of Viable Bacteria in Water. LID - 10.3390/mi11121079 [doi] LID - 1079 AB - (1) Background: Access to clean water is a very important factor for human life. However, pathogenic microorganisms in drinking water often cause diseases, and convenient/inexpensive testing methods are urgently needed. (2) Methods: The reagent contains 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and phenazine methosulfate (PMS) and can react with succinate dehydrogenase within bacterial cell membranes to produce visible purple crystals. The colorimetric change of the reagent after reaction can be measured by a sensor (AS7262). (3) Results: Compared with traditional methods, our device is simple to operate and can provide rapid (i.e., 5 min) semi-quantitative results regarding the concentration of bacteria within a test sample. (4) Conclusions: This easy-to-use device, which employs MTT-PMS reagents, can be regarded as a potential and portable tool for rapid water quality determination. FAU - Liao, Yu-Hsiang AU - Liao YH AD - Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. FAU - Muthuramalingam, Karthickraj AU - Muthuramalingam K AD - Electronic and Optoelectronic System Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan. FAU - Tung, Kuo-Hao AU - Tung KH AD - Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. FAU - Chuan, Ho-Hsien AU - Chuan HH AD - Department of Surgery, National Taiwan University Hospital, Chu-Tung Branch, Hsinchu 300, Taiwan. FAU - Liang, Ko-Yuan AU - Liang KY AD - Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, Kaohsiung 833, Taiwan. AD - Super Micro Mass Research and Technology Center, Cheng Shiu University, Kaohsiung 833, Taiwan. FAU - Hsu, Chen-Peng AU - Hsu CP AD - Electronic and Optoelectronic System Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan. FAU - Cheng, Chao-Min AU - Cheng CM AD - Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. LA - eng PT - Journal Article DEP - 20201204 PL - Switzerland TA - Micromachines (Basel) JT - Micromachines JID - 101640903 PMC - PMC7761948 OTO - NOTNLM OT - MTT OT - PMS OT - bacterial detection OT - colorimetry OT - portable device COIS- The authors declare no conflict of interest. EDAT- 2020/12/10 06:00 MHDA- 2020/12/10 06:01 PMCR- 2020/12/04 CRDT- 2020/12/09 01:02 PHST- 2020/10/26 00:00 [received] PHST- 2020/11/30 00:00 [revised] PHST- 2020/12/03 00:00 [accepted] PHST- 2020/12/09 01:02 [entrez] PHST- 2020/12/10 06:00 [pubmed] PHST- 2020/12/10 06:01 [medline] PHST- 2020/12/04 00:00 [pmc-release] AID - mi11121079 [pii] AID - micromachines-11-01079 [pii] AID - 10.3390/mi11121079 [doi] PST - epublish SO - Micromachines (Basel). 2020 Dec 4;11(12):1079. doi: 10.3390/mi11121079.