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. 2021 May 12;23(5):e22973. doi: 10.2196/22973

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©Theresa L Rager, Cristian Koepfli, Wasif A Khan, Sabeena Ahmed, Zahid Hayat Mahmud, Katherine N Clayton. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 12.05.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on https://www.jmir.org/, as well as this copyright and license information must be included.

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OmniVis device and app workflow: (1) environmental water sample is collected into well of single-use disposable test kit and channel is sealed, (2) test kit is inserted into hardware heating unit for loop-mediated isothermal amplification, (3) after 40 minutes, sample is placed in microscope imaging slot, (4) OmniVis app displays results: contaminated/not contaminated.